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Posted to dev@activemq.apache.org by "jk@penguinsfan.com (JIRA)" <ji...@apache.org> on 2006/11/19 21:08:02 UTC

[jira] Created: (AMQ-1061) Memory usage jumps > 100% with durable subscription and stays there

Memory usage jumps > 100% with durable subscription and stays there
-------------------------------------------------------------------

                 Key: AMQ-1061
                 URL: https://issues.apache.org/activemq/browse/AMQ-1061
             Project: ActiveMQ
          Issue Type: Bug
    Affects Versions: 4.2.0
         Environment: Windows XP Professional, JVM 1.5.0_09
            Reporter: jk@penguinsfan.com
            Priority: Critical
             Fix For: 4.2.0


Using the store pending cursor, activemq.xml configured to use 200M of RAM and Kaha store.  JVM started with options -Xms512M -Xmx512M -Xmn100M.  Messages are 10KB in size, prefetch is default. 

I am seeing the memory usage immediately jump up really high (>100) as soon as a durable consumer is activated when a large number of messages are waiting for that consumer. 

The producer hangs under this situation. 

If the consumer is killed before memory usage drops to normal, memory usage does not drop (i.e., the server locks forever).

Sometimes, it is possible to exhaust the Java heap and actually crash the server.

Here is the kind of things I'm seeing in the DEBUG log: 

2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 10, to: 9 
2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 9, to: 8 
2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 8, to: 7 
2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 7, to: 6 
2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 6, to: 5 
2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 5, to: 4 
2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 4, to: 3 
2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 3, to: 2 
2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 2, to: 1 
2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 1, to: 0 
2006-11-19 13:51:53,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 58, to: 59 
2006-11-19 13:51:53,593 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 59, to: 60 
2006-11-19 13:51:53,812 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 60, to: 61 
2006-11-19 13:51:53,843 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 61, to: 62 
2006-11-19 13:51:53,890 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 62, to: 63 
2006-11-19 13:51:54,015 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 63, to: 64 
2006-11-19 13:51:54,015 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 64, to: 65 
2006-11-19 13:51:54,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 65, to: 66 
2006-11-19 13:51:54,062 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 66, to: 67 
2006-11-19 13:51:54,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 67, to: 68 
2006-11-19 13:51:54,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 68, to: 69 
2006-11-19 13:51:54,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 69, to: 70 
2006-11-19 13:51:54,125 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 70, to: 71 
2006-11-19 13:51:54,171 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 71, to: 72 
2006-11-19 13:51:54,171 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 72, to: 73 
2006-11-19 13:51:54,171 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 73, to: 74 
2006-11-19 13:51:54,187 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 74, to: 75 
2006-11-19 13:51:54,234 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 75, to: 76 
2006-11-19 13:51:54,234 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 76, to: 77 
2006-11-19 13:51:54,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 77, to: 78 
2006-11-19 13:51:54,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 78, to: 79 
2006-11-19 13:51:54,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 79, to: 80 
2006-11-19 13:51:54,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 80, to: 81 
2006-11-19 13:51:54,281 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 81, to: 82 
2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 82, to: 83 
2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 83, to: 84 
2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 84, to: 85 
2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 85, to: 86 
2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 86, to: 87 
2006-11-19 13:51:54,359 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 87, to: 88 
2006-11-19 13:51:54,390 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 88, to: 89 
2006-11-19 13:51:54,390 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 89, to: 90 
2006-11-19 13:51:54,406 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 90, to: 91 
2006-11-19 13:51:54,406 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 91, to: 92 
2006-11-19 13:51:54,406 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 92, to: 93 
2006-11-19 13:51:54,421 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 93, to: 94 
2006-11-19 13:51:54,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 94, to: 95 
2006-11-19 13:51:54,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 95, to: 96 
2006-11-19 13:51:54,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 96, to: 97 
2006-11-19 13:51:54,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 97, to: 98 
2006-11-19 13:51:54,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 98, to: 99 
2006-11-19 13:51:54,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 99, to: 100 
2006-11-19 13:51:54,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 100, to: 101 
2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 101, to: 102 
2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 102, to: 103 
2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 103, to: 104 
2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 104, to: 105 
2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 105, to: 106 
2006-11-19 13:51:54,562 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 106, to: 107 
2006-11-19 13:51:54,562 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 107, to: 108 
2006-11-19 13:51:54,562 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 108, to: 109 
2006-11-19 13:51:54,593 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 109, to: 110 
2006-11-19 13:51:54,609 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 110, to: 111 
2006-11-19 13:51:54,609 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 111, to: 112 
2006-11-19 13:51:54,609 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 112, to: 113 
2006-11-19 13:51:54,609 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 113, to: 114 
2006-11-19 13:51:54,625 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 114, to: 115 
2006-11-19 13:51:54,687 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 115, to: 116 
2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 116, to: 117 
2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 117, to: 118 
2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 118, to: 119 
2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 119, to: 120 
2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 120, to: 121 
2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 121, to: 122 
2006-11-19 13:51:54,734 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 122, to: 123 
2006-11-19 13:51:54,734 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 123, to: 124 
2006-11-19 13:51:54,750 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 124, to: 125 
2006-11-19 13:51:54,765 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 125, to: 126 
2006-11-19 13:51:54,781 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 126, to: 127 
2006-11-19 13:51:54,781 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 127, to: 128 
2006-11-19 13:51:54,812 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 128, to: 129 
2006-11-19 13:51:54,828 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 129, to: 130 
2006-11-19 13:51:54,828 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 130, to: 131 
2006-11-19 13:51:54,828 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 131, to: 132 
2006-11-19 13:51:54,843 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 132, to: 133 
2006-11-19 13:51:54,984 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 133, to: 134 
2006-11-19 13:51:54,984 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 134, to: 135 
2006-11-19 13:51:54,984 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 135, to: 136 
2006-11-19 13:51:55,031 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 136, to: 137 
2006-11-19 13:51:55,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 137, to: 138 
2006-11-19 13:51:55,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 138, to: 139 
2006-11-19 13:51:55,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 139, to: 140 
2006-11-19 13:51:55,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 140, to: 141 
2006-11-19 13:51:55,062 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 141, to: 142 
2006-11-19 13:51:55,062 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 142, to: 143 
2006-11-19 13:51:55,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 143, to: 144 
2006-11-19 13:51:55,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 144, to: 145 
2006-11-19 13:51:55,234 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 145, to: 146 
2006-11-19 13:51:55,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 146, to: 147 
2006-11-19 13:51:55,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 147, to: 148 
2006-11-19 13:51:55,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 148, to: 149 
2006-11-19 13:51:55,281 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 149, to: 150 
2006-11-19 13:51:55,281 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 150, to: 151 
2006-11-19 13:51:55,281 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 151, to: 152 
2006-11-19 13:51:55,375 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 152, to: 153 
2006-11-19 13:51:55,390 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 153, to: 154 
2006-11-19 13:51:55,406 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 154, to: 155 
2006-11-19 13:51:55,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 155, to: 156 
2006-11-19 13:51:55,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 156, to: 157 
2006-11-19 13:51:55,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 157, to: 158 
2006-11-19 13:51:55,453 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 158, to: 159 
2006-11-19 13:51:55,453 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 159, to: 160 
2006-11-19 13:51:55,453 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 160, to: 161 
2006-11-19 13:51:55,484 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 161, to: 162 
2006-11-19 13:51:55,484 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 162, to: 163 
2006-11-19 13:51:55,531 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 163, to: 164 
2006-11-19 13:51:55,562 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 164, to: 165

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[jira] Commented: (AMQ-1061) Memory usage jumps > 100% with durable subscription and stays there

Posted by "jk@penguinsfan.com (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/activemq/browse/AMQ-1061?page=comments#action_37494 ] 
            
jk@penguinsfan.com commented on AMQ-1061:
-----------------------------------------

Looking closer at this, it appears I goofed and didn't set the 200M in my config file.

However, this is still an issue because it is possible for a client to send a single big message (or several big messages in succession) and kill the server.

It would be nice if the prefetch/page in could be configured in terms of bytes, not just number of messages.  Also, some kind of global optimization that looks at the current memory usage percentage and tries to keep it below some threshold.

My application has some use cases where big messages will be going into the queues, where the queues usually contain lots of small messages but there can be much larger ones and possible even streams of larger ones in succession.  It would be great if the server could handle this gracefully.

> Memory usage jumps > 100% with durable subscription and stays there
> -------------------------------------------------------------------
>
>                 Key: AMQ-1061
>                 URL: https://issues.apache.org/activemq/browse/AMQ-1061
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 4.2.0
>         Environment: Windows XP Professional, JVM 1.5.0_09
>            Reporter: jk@penguinsfan.com
>            Priority: Critical
>             Fix For: 4.2.0
>
>
> Using the store pending cursor, activemq.xml configured to use 200M of RAM and Kaha store.  JVM started with options -Xms512M -Xmx512M -Xmn100M.  Messages are 10KB in size, prefetch is default. 
> I am seeing the memory usage immediately jump up really high (>100) as soon as a durable consumer is activated when a large number of messages are waiting for that consumer. 
> The producer hangs under this situation. 
> If the consumer is killed before memory usage drops to normal, memory usage does not drop (i.e., the server locks forever).
> Sometimes, it is possible to exhaust the Java heap and actually crash the server.
> Here is the kind of things I'm seeing in the DEBUG log: 
> 2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 10, to: 9 
> 2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 9, to: 8 
> 2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 8, to: 7 
> 2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 7, to: 6 
> 2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 6, to: 5 
> 2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 5, to: 4 
> 2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 4, to: 3 
> 2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 3, to: 2 
> 2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 2, to: 1 
> 2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 1, to: 0 
> 2006-11-19 13:51:53,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 58, to: 59 
> 2006-11-19 13:51:53,593 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 59, to: 60 
> 2006-11-19 13:51:53,812 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 60, to: 61 
> 2006-11-19 13:51:53,843 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 61, to: 62 
> 2006-11-19 13:51:53,890 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 62, to: 63 
> 2006-11-19 13:51:54,015 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 63, to: 64 
> 2006-11-19 13:51:54,015 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 64, to: 65 
> 2006-11-19 13:51:54,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 65, to: 66 
> 2006-11-19 13:51:54,062 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 66, to: 67 
> 2006-11-19 13:51:54,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 67, to: 68 
> 2006-11-19 13:51:54,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 68, to: 69 
> 2006-11-19 13:51:54,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 69, to: 70 
> 2006-11-19 13:51:54,125 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 70, to: 71 
> 2006-11-19 13:51:54,171 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 71, to: 72 
> 2006-11-19 13:51:54,171 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 72, to: 73 
> 2006-11-19 13:51:54,171 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 73, to: 74 
> 2006-11-19 13:51:54,187 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 74, to: 75 
> 2006-11-19 13:51:54,234 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 75, to: 76 
> 2006-11-19 13:51:54,234 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 76, to: 77 
> 2006-11-19 13:51:54,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 77, to: 78 
> 2006-11-19 13:51:54,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 78, to: 79 
> 2006-11-19 13:51:54,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 79, to: 80 
> 2006-11-19 13:51:54,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 80, to: 81 
> 2006-11-19 13:51:54,281 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 81, to: 82 
> 2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 82, to: 83 
> 2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 83, to: 84 
> 2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 84, to: 85 
> 2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 85, to: 86 
> 2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 86, to: 87 
> 2006-11-19 13:51:54,359 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 87, to: 88 
> 2006-11-19 13:51:54,390 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 88, to: 89 
> 2006-11-19 13:51:54,390 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 89, to: 90 
> 2006-11-19 13:51:54,406 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 90, to: 91 
> 2006-11-19 13:51:54,406 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 91, to: 92 
> 2006-11-19 13:51:54,406 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 92, to: 93 
> 2006-11-19 13:51:54,421 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 93, to: 94 
> 2006-11-19 13:51:54,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 94, to: 95 
> 2006-11-19 13:51:54,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 95, to: 96 
> 2006-11-19 13:51:54,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 96, to: 97 
> 2006-11-19 13:51:54,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 97, to: 98 
> 2006-11-19 13:51:54,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 98, to: 99 
> 2006-11-19 13:51:54,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 99, to: 100 
> 2006-11-19 13:51:54,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 100, to: 101 
> 2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 101, to: 102 
> 2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 102, to: 103 
> 2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 103, to: 104 
> 2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 104, to: 105 
> 2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 105, to: 106 
> 2006-11-19 13:51:54,562 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 106, to: 107 
> 2006-11-19 13:51:54,562 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 107, to: 108 
> 2006-11-19 13:51:54,562 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 108, to: 109 
> 2006-11-19 13:51:54,593 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 109, to: 110 
> 2006-11-19 13:51:54,609 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 110, to: 111 
> 2006-11-19 13:51:54,609 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 111, to: 112 
> 2006-11-19 13:51:54,609 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 112, to: 113 
> 2006-11-19 13:51:54,609 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 113, to: 114 
> 2006-11-19 13:51:54,625 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 114, to: 115 
> 2006-11-19 13:51:54,687 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 115, to: 116 
> 2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 116, to: 117 
> 2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 117, to: 118 
> 2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 118, to: 119 
> 2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 119, to: 120 
> 2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 120, to: 121 
> 2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 121, to: 122 
> 2006-11-19 13:51:54,734 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 122, to: 123 
> 2006-11-19 13:51:54,734 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 123, to: 124 
> 2006-11-19 13:51:54,750 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 124, to: 125 
> 2006-11-19 13:51:54,765 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 125, to: 126 
> 2006-11-19 13:51:54,781 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 126, to: 127 
> 2006-11-19 13:51:54,781 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 127, to: 128 
> 2006-11-19 13:51:54,812 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 128, to: 129 
> 2006-11-19 13:51:54,828 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 129, to: 130 
> 2006-11-19 13:51:54,828 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 130, to: 131 
> 2006-11-19 13:51:54,828 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 131, to: 132 
> 2006-11-19 13:51:54,843 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 132, to: 133 
> 2006-11-19 13:51:54,984 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 133, to: 134 
> 2006-11-19 13:51:54,984 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 134, to: 135 
> 2006-11-19 13:51:54,984 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 135, to: 136 
> 2006-11-19 13:51:55,031 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 136, to: 137 
> 2006-11-19 13:51:55,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 137, to: 138 
> 2006-11-19 13:51:55,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 138, to: 139 
> 2006-11-19 13:51:55,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 139, to: 140 
> 2006-11-19 13:51:55,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 140, to: 141 
> 2006-11-19 13:51:55,062 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 141, to: 142 
> 2006-11-19 13:51:55,062 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 142, to: 143 
> 2006-11-19 13:51:55,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 143, to: 144 
> 2006-11-19 13:51:55,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 144, to: 145 
> 2006-11-19 13:51:55,234 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 145, to: 146 
> 2006-11-19 13:51:55,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 146, to: 147 
> 2006-11-19 13:51:55,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 147, to: 148 
> 2006-11-19 13:51:55,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 148, to: 149 
> 2006-11-19 13:51:55,281 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 149, to: 150 
> 2006-11-19 13:51:55,281 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 150, to: 151 
> 2006-11-19 13:51:55,281 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 151, to: 152 
> 2006-11-19 13:51:55,375 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 152, to: 153 
> 2006-11-19 13:51:55,390 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 153, to: 154 
> 2006-11-19 13:51:55,406 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 154, to: 155 
> 2006-11-19 13:51:55,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 155, to: 156 
> 2006-11-19 13:51:55,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 156, to: 157 
> 2006-11-19 13:51:55,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 157, to: 158 
> 2006-11-19 13:51:55,453 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 158, to: 159 
> 2006-11-19 13:51:55,453 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 159, to: 160 
> 2006-11-19 13:51:55,453 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 160, to: 161 
> 2006-11-19 13:51:55,484 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 161, to: 162 
> 2006-11-19 13:51:55,484 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 162, to: 163 
> 2006-11-19 13:51:55,531 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 163, to: 164 
> 2006-11-19 13:51:55,562 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 164, to: 165

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[jira] Assigned: (AMQ-1061) Memory usage jumps > 100% with durable subscription and stays there

Posted by "Rob Davies (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/activemq/browse/AMQ-1061?page=all ]

Rob Davies reassigned AMQ-1061:
-------------------------------

    Assignee: Rob Davies

> Memory usage jumps > 100% with durable subscription and stays there
> -------------------------------------------------------------------
>
>                 Key: AMQ-1061
>                 URL: https://issues.apache.org/activemq/browse/AMQ-1061
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 4.2.0
>         Environment: Windows XP Professional, JVM 1.5.0_09
>            Reporter: jk@penguinsfan.com
>         Assigned To: Rob Davies
>            Priority: Critical
>             Fix For: 4.2.0
>
>
> Using the store pending cursor, activemq.xml configured to use 200M of RAM and Kaha store.  JVM started with options -Xms512M -Xmx512M -Xmn100M.  Messages are 10KB in size, prefetch is default. 
> I am seeing the memory usage immediately jump up really high (>100) as soon as a durable consumer is activated when a large number of messages are waiting for that consumer. 
> The producer hangs under this situation. 
> If the consumer is killed before memory usage drops to normal, memory usage does not drop (i.e., the server locks forever).
> Sometimes, it is possible to exhaust the Java heap and actually crash the server.
> Here is the kind of things I'm seeing in the DEBUG log: 
> 2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 10, to: 9 
> 2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 9, to: 8 
> 2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 8, to: 7 
> 2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 7, to: 6 
> 2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 6, to: 5 
> 2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 5, to: 4 
> 2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 4, to: 3 
> 2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 3, to: 2 
> 2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 2, to: 1 
> 2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 1, to: 0 
> 2006-11-19 13:51:53,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 58, to: 59 
> 2006-11-19 13:51:53,593 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 59, to: 60 
> 2006-11-19 13:51:53,812 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 60, to: 61 
> 2006-11-19 13:51:53,843 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 61, to: 62 
> 2006-11-19 13:51:53,890 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 62, to: 63 
> 2006-11-19 13:51:54,015 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 63, to: 64 
> 2006-11-19 13:51:54,015 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 64, to: 65 
> 2006-11-19 13:51:54,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 65, to: 66 
> 2006-11-19 13:51:54,062 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 66, to: 67 
> 2006-11-19 13:51:54,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 67, to: 68 
> 2006-11-19 13:51:54,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 68, to: 69 
> 2006-11-19 13:51:54,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 69, to: 70 
> 2006-11-19 13:51:54,125 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 70, to: 71 
> 2006-11-19 13:51:54,171 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 71, to: 72 
> 2006-11-19 13:51:54,171 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 72, to: 73 
> 2006-11-19 13:51:54,171 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 73, to: 74 
> 2006-11-19 13:51:54,187 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 74, to: 75 
> 2006-11-19 13:51:54,234 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 75, to: 76 
> 2006-11-19 13:51:54,234 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 76, to: 77 
> 2006-11-19 13:51:54,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 77, to: 78 
> 2006-11-19 13:51:54,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 78, to: 79 
> 2006-11-19 13:51:54,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 79, to: 80 
> 2006-11-19 13:51:54,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 80, to: 81 
> 2006-11-19 13:51:54,281 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 81, to: 82 
> 2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 82, to: 83 
> 2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 83, to: 84 
> 2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 84, to: 85 
> 2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 85, to: 86 
> 2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 86, to: 87 
> 2006-11-19 13:51:54,359 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 87, to: 88 
> 2006-11-19 13:51:54,390 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 88, to: 89 
> 2006-11-19 13:51:54,390 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 89, to: 90 
> 2006-11-19 13:51:54,406 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 90, to: 91 
> 2006-11-19 13:51:54,406 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 91, to: 92 
> 2006-11-19 13:51:54,406 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 92, to: 93 
> 2006-11-19 13:51:54,421 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 93, to: 94 
> 2006-11-19 13:51:54,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 94, to: 95 
> 2006-11-19 13:51:54,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 95, to: 96 
> 2006-11-19 13:51:54,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 96, to: 97 
> 2006-11-19 13:51:54,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 97, to: 98 
> 2006-11-19 13:51:54,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 98, to: 99 
> 2006-11-19 13:51:54,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 99, to: 100 
> 2006-11-19 13:51:54,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 100, to: 101 
> 2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 101, to: 102 
> 2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 102, to: 103 
> 2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 103, to: 104 
> 2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 104, to: 105 
> 2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 105, to: 106 
> 2006-11-19 13:51:54,562 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 106, to: 107 
> 2006-11-19 13:51:54,562 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 107, to: 108 
> 2006-11-19 13:51:54,562 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 108, to: 109 
> 2006-11-19 13:51:54,593 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 109, to: 110 
> 2006-11-19 13:51:54,609 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 110, to: 111 
> 2006-11-19 13:51:54,609 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 111, to: 112 
> 2006-11-19 13:51:54,609 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 112, to: 113 
> 2006-11-19 13:51:54,609 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 113, to: 114 
> 2006-11-19 13:51:54,625 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 114, to: 115 
> 2006-11-19 13:51:54,687 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 115, to: 116 
> 2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 116, to: 117 
> 2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 117, to: 118 
> 2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 118, to: 119 
> 2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 119, to: 120 
> 2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 120, to: 121 
> 2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 121, to: 122 
> 2006-11-19 13:51:54,734 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 122, to: 123 
> 2006-11-19 13:51:54,734 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 123, to: 124 
> 2006-11-19 13:51:54,750 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 124, to: 125 
> 2006-11-19 13:51:54,765 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 125, to: 126 
> 2006-11-19 13:51:54,781 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 126, to: 127 
> 2006-11-19 13:51:54,781 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 127, to: 128 
> 2006-11-19 13:51:54,812 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 128, to: 129 
> 2006-11-19 13:51:54,828 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 129, to: 130 
> 2006-11-19 13:51:54,828 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 130, to: 131 
> 2006-11-19 13:51:54,828 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 131, to: 132 
> 2006-11-19 13:51:54,843 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 132, to: 133 
> 2006-11-19 13:51:54,984 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 133, to: 134 
> 2006-11-19 13:51:54,984 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 134, to: 135 
> 2006-11-19 13:51:54,984 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 135, to: 136 
> 2006-11-19 13:51:55,031 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 136, to: 137 
> 2006-11-19 13:51:55,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 137, to: 138 
> 2006-11-19 13:51:55,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 138, to: 139 
> 2006-11-19 13:51:55,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 139, to: 140 
> 2006-11-19 13:51:55,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 140, to: 141 
> 2006-11-19 13:51:55,062 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 141, to: 142 
> 2006-11-19 13:51:55,062 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 142, to: 143 
> 2006-11-19 13:51:55,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 143, to: 144 
> 2006-11-19 13:51:55,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 144, to: 145 
> 2006-11-19 13:51:55,234 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 145, to: 146 
> 2006-11-19 13:51:55,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 146, to: 147 
> 2006-11-19 13:51:55,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 147, to: 148 
> 2006-11-19 13:51:55,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 148, to: 149 
> 2006-11-19 13:51:55,281 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 149, to: 150 
> 2006-11-19 13:51:55,281 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 150, to: 151 
> 2006-11-19 13:51:55,281 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 151, to: 152 
> 2006-11-19 13:51:55,375 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 152, to: 153 
> 2006-11-19 13:51:55,390 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 153, to: 154 
> 2006-11-19 13:51:55,406 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 154, to: 155 
> 2006-11-19 13:51:55,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 155, to: 156 
> 2006-11-19 13:51:55,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 156, to: 157 
> 2006-11-19 13:51:55,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 157, to: 158 
> 2006-11-19 13:51:55,453 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 158, to: 159 
> 2006-11-19 13:51:55,453 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 159, to: 160 
> 2006-11-19 13:51:55,453 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 160, to: 161 
> 2006-11-19 13:51:55,484 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 161, to: 162 
> 2006-11-19 13:51:55,484 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 162, to: 163 
> 2006-11-19 13:51:55,531 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 163, to: 164 
> 2006-11-19 13:51:55,562 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 164, to: 165

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[jira] Resolved: (AMQ-1061) Memory usage jumps > 100% with durable subscription and stays there

Posted by "Rob Davies (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/activemq/browse/AMQ-1061?page=all ]

Rob Davies resolved AMQ-1061.
-----------------------------

    Resolution: Fixed

SVN revision 478967.

> Memory usage jumps > 100% with durable subscription and stays there
> -------------------------------------------------------------------
>
>                 Key: AMQ-1061
>                 URL: https://issues.apache.org/activemq/browse/AMQ-1061
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 4.2.0
>         Environment: Windows XP Professional, JVM 1.5.0_09
>            Reporter: jk@penguinsfan.com
>         Assigned To: Rob Davies
>            Priority: Critical
>             Fix For: 4.2.0
>
>
> Using the store pending cursor, activemq.xml configured to use 200M of RAM and Kaha store.  JVM started with options -Xms512M -Xmx512M -Xmn100M.  Messages are 10KB in size, prefetch is default. 
> I am seeing the memory usage immediately jump up really high (>100) as soon as a durable consumer is activated when a large number of messages are waiting for that consumer. 
> The producer hangs under this situation. 
> If the consumer is killed before memory usage drops to normal, memory usage does not drop (i.e., the server locks forever).
> Sometimes, it is possible to exhaust the Java heap and actually crash the server.
> Here is the kind of things I'm seeing in the DEBUG log: 
> 2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 10, to: 9 
> 2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 9, to: 8 
> 2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 8, to: 7 
> 2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 7, to: 6 
> 2006-11-19 13:51:53,046 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 6, to: 5 
> 2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 5, to: 4 
> 2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 4, to: 3 
> 2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 3, to: 2 
> 2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 2, to: 1 
> 2006-11-19 13:51:53,062 [ata File Writer] DEBUG UsageManager                   - Memory usage change.  from: 1, to: 0 
> 2006-11-19 13:51:53,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 58, to: 59 
> 2006-11-19 13:51:53,593 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 59, to: 60 
> 2006-11-19 13:51:53,812 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 60, to: 61 
> 2006-11-19 13:51:53,843 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 61, to: 62 
> 2006-11-19 13:51:53,890 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 62, to: 63 
> 2006-11-19 13:51:54,015 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 63, to: 64 
> 2006-11-19 13:51:54,015 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 64, to: 65 
> 2006-11-19 13:51:54,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 65, to: 66 
> 2006-11-19 13:51:54,062 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 66, to: 67 
> 2006-11-19 13:51:54,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 67, to: 68 
> 2006-11-19 13:51:54,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 68, to: 69 
> 2006-11-19 13:51:54,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 69, to: 70 
> 2006-11-19 13:51:54,125 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 70, to: 71 
> 2006-11-19 13:51:54,171 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 71, to: 72 
> 2006-11-19 13:51:54,171 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 72, to: 73 
> 2006-11-19 13:51:54,171 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 73, to: 74 
> 2006-11-19 13:51:54,187 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 74, to: 75 
> 2006-11-19 13:51:54,234 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 75, to: 76 
> 2006-11-19 13:51:54,234 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 76, to: 77 
> 2006-11-19 13:51:54,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 77, to: 78 
> 2006-11-19 13:51:54,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 78, to: 79 
> 2006-11-19 13:51:54,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 79, to: 80 
> 2006-11-19 13:51:54,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 80, to: 81 
> 2006-11-19 13:51:54,281 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 81, to: 82 
> 2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 82, to: 83 
> 2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 83, to: 84 
> 2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 84, to: 85 
> 2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 85, to: 86 
> 2006-11-19 13:51:54,312 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 86, to: 87 
> 2006-11-19 13:51:54,359 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 87, to: 88 
> 2006-11-19 13:51:54,390 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 88, to: 89 
> 2006-11-19 13:51:54,390 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 89, to: 90 
> 2006-11-19 13:51:54,406 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 90, to: 91 
> 2006-11-19 13:51:54,406 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 91, to: 92 
> 2006-11-19 13:51:54,406 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 92, to: 93 
> 2006-11-19 13:51:54,421 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 93, to: 94 
> 2006-11-19 13:51:54,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 94, to: 95 
> 2006-11-19 13:51:54,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 95, to: 96 
> 2006-11-19 13:51:54,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 96, to: 97 
> 2006-11-19 13:51:54,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 97, to: 98 
> 2006-11-19 13:51:54,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 98, to: 99 
> 2006-11-19 13:51:54,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 99, to: 100 
> 2006-11-19 13:51:54,468 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 100, to: 101 
> 2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 101, to: 102 
> 2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 102, to: 103 
> 2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 103, to: 104 
> 2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 104, to: 105 
> 2006-11-19 13:51:54,500 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 105, to: 106 
> 2006-11-19 13:51:54,562 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 106, to: 107 
> 2006-11-19 13:51:54,562 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 107, to: 108 
> 2006-11-19 13:51:54,562 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 108, to: 109 
> 2006-11-19 13:51:54,593 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 109, to: 110 
> 2006-11-19 13:51:54,609 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 110, to: 111 
> 2006-11-19 13:51:54,609 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 111, to: 112 
> 2006-11-19 13:51:54,609 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 112, to: 113 
> 2006-11-19 13:51:54,609 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 113, to: 114 
> 2006-11-19 13:51:54,625 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 114, to: 115 
> 2006-11-19 13:51:54,687 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 115, to: 116 
> 2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 116, to: 117 
> 2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 117, to: 118 
> 2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 118, to: 119 
> 2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 119, to: 120 
> 2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 120, to: 121 
> 2006-11-19 13:51:54,718 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 121, to: 122 
> 2006-11-19 13:51:54,734 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 122, to: 123 
> 2006-11-19 13:51:54,734 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 123, to: 124 
> 2006-11-19 13:51:54,750 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 124, to: 125 
> 2006-11-19 13:51:54,765 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 125, to: 126 
> 2006-11-19 13:51:54,781 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 126, to: 127 
> 2006-11-19 13:51:54,781 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 127, to: 128 
> 2006-11-19 13:51:54,812 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 128, to: 129 
> 2006-11-19 13:51:54,828 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 129, to: 130 
> 2006-11-19 13:51:54,828 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 130, to: 131 
> 2006-11-19 13:51:54,828 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 131, to: 132 
> 2006-11-19 13:51:54,843 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 132, to: 133 
> 2006-11-19 13:51:54,984 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 133, to: 134 
> 2006-11-19 13:51:54,984 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 134, to: 135 
> 2006-11-19 13:51:54,984 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 135, to: 136 
> 2006-11-19 13:51:55,031 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 136, to: 137 
> 2006-11-19 13:51:55,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 137, to: 138 
> 2006-11-19 13:51:55,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 138, to: 139 
> 2006-11-19 13:51:55,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 139, to: 140 
> 2006-11-19 13:51:55,046 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 140, to: 141 
> 2006-11-19 13:51:55,062 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 141, to: 142 
> 2006-11-19 13:51:55,062 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 142, to: 143 
> 2006-11-19 13:51:55,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 143, to: 144 
> 2006-11-19 13:51:55,109 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 144, to: 145 
> 2006-11-19 13:51:55,234 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 145, to: 146 
> 2006-11-19 13:51:55,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 146, to: 147 
> 2006-11-19 13:51:55,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 147, to: 148 
> 2006-11-19 13:51:55,265 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 148, to: 149 
> 2006-11-19 13:51:55,281 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 149, to: 150 
> 2006-11-19 13:51:55,281 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 150, to: 151 
> 2006-11-19 13:51:55,281 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 151, to: 152 
> 2006-11-19 13:51:55,375 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 152, to: 153 
> 2006-11-19 13:51:55,390 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 153, to: 154 
> 2006-11-19 13:51:55,406 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 154, to: 155 
> 2006-11-19 13:51:55,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 155, to: 156 
> 2006-11-19 13:51:55,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 156, to: 157 
> 2006-11-19 13:51:55,437 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 157, to: 158 
> 2006-11-19 13:51:55,453 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 158, to: 159 
> 2006-11-19 13:51:55,453 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 159, to: 160 
> 2006-11-19 13:51:55,453 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 160, to: 161 
> 2006-11-19 13:51:55,484 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 161, to: 162 
> 2006-11-19 13:51:55,484 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 162, to: 163 
> 2006-11-19 13:51:55,531 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 163, to: 164 
> 2006-11-19 13:51:55,562 [/127.0.0.1:1999] DEBUG UsageManager                   - Memory usage change.  from: 164, to: 165

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