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Posted to users@activemq.apache.org by pradeep <pr...@gmail.com> on 2006/08/25 09:12:14 UTC
Significance of usageManager
1. What is the significance of usageManager? Why do we need it?
2. Is it used to specify the maximum memory allocated for storing messages ?
3. What happenes when max memory is reached ? Will ActiveMQ stop processing
further messages from client ?
I am facing memory problem when running evaulation test on AvtiveMQ as
posted in another thread. It is surprising that I did not face this issue
when using another JMS server embedded in a app server.
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Re: Significance of usageManager
Posted by James Strachan <ja...@gmail.com>.
On 8/25/06, pradeep <pr...@gmail.com> wrote:
>
> No, there are no consumers :)
> Another question- how are you measuring the amount of RAM allocated to the
> usageManager in java ? Just curious.
The size of the messages used since the broker knows the size of the
messages (as its just marshalled/unmarshalled them).
--
James
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Re: Significance of usageManager
Posted by pradeep <pr...@gmail.com>.
No, there are no consumers :)
Another question- how are you measuring the amount of RAM allocated to the
usageManager in java ? Just curious.
sorry for asking too many questions but since I am evaluating jms servers it
is important for me to understand.
James.Strachan wrote:
>
> On 8/25/06, pradeep <pr...@gmail.com> wrote:
>>
>> Thanks again. When max memory is reached client's dont get exception
>> message.
>> Why ?
>
> Because its not an exception. If consumers start processing messages
> things will carry on.
>
>> The clients are blocked for ever as I am seeing it.
>
> Do you have any consumers consuming messages?
>
> --
>
> James
> -------
> http://radio.weblogs.com/0112098/
>
>
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Re: Significance of usageManager
Posted by James Strachan <ja...@gmail.com>.
On 8/25/06, pradeep <pr...@gmail.com> wrote:
>
> Thanks again. When max memory is reached client's dont get exception message.
> Why ?
Because its not an exception. If consumers start processing messages
things will carry on.
> The clients are blocked for ever as I am seeing it.
Do you have any consumers consuming messages?
--
James
-------
http://radio.weblogs.com/0112098/
Re: Significance of usageManager
Posted by James Strachan <ja...@gmail.com>.
On 8/25/06, John Heitmann <jh...@gmail.com> wrote:
>
> On Aug 25, 2006, at 12:48 AM, pradeep wrote:
>
> >
> > Thanks again. When max memory is reached client's dont get
> > exception message.
> > Why ? The clients are blocked for ever as I am seeing it.
> > Pradeep
>
> If you're willing to muck about with the sources you might want to
> try this patch to make the broker it give you an exception instead of
> block:
>
> http://issues.apache.org/activemq/browse/AMQ-515
Patch applied now John with thanks.
--
James
-------
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Re: Significance of usageManager
Posted by John Heitmann <jh...@gmail.com>.
On Aug 25, 2006, at 12:48 AM, pradeep wrote:
>
> Thanks again. When max memory is reached client's dont get
> exception message.
> Why ? The clients are blocked for ever as I am seeing it.
> Pradeep
If you're willing to muck about with the sources you might want to
try this patch to make the broker it give you an exception instead of
block:
http://issues.apache.org/activemq/browse/AMQ-515
John
Re: Significance of usageManager
Posted by pradeep <pr...@gmail.com>.
Thanks again. When max memory is reached client's dont get exception message.
Why ? The clients are blocked for ever as I am seeing it.
Pradeep
James.Strachan wrote:
>
> On 8/25/06, pradeep <pr...@gmail.com> wrote:
>>
>> Thanks James.What not depend on JVM heap size rather than having another
>> parameter.
>
> Because there's no way of knowing when you will run out of heap and so
> the JVM will be completely useless. e.g. folks do the same when
> writing Caches in Java
>
> --
>
> James
> -------
> http://radio.weblogs.com/0112098/
>
>
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Re: Significance of usageManager
Posted by James Strachan <ja...@gmail.com>.
On 8/25/06, pradeep <pr...@gmail.com> wrote:
>
> Thanks James.What not depend on JVM heap size rather than having another
> parameter.
Because there's no way of knowing when you will run out of heap and so
the JVM will be completely useless. e.g. folks do the same when
writing Caches in Java
--
James
-------
http://radio.weblogs.com/0112098/
Re: Significance of usageManager
Posted by pradeep <pr...@gmail.com>.
Thanks James.What not depend on JVM heap size rather than having another
parameter.
pradeep wrote:
>
> 1. What is the significance of usageManager? Why do we need it?
> 2. Is it used to specify the maximum memory allocated for storing messages
> ?
> 3. What happenes when max memory is reached ? Will ActiveMQ stop
> processing further messages from client ?
>
> I am facing memory problem when running evaulation test on AvtiveMQ as
> posted in another thread. It is surprising that I did not face this issue
> when using another JMS server embedded in a app server.
>
>
--
View this message in context: http://www.nabble.com/Significance-of-usageManager-tf2163175.html#a5978742
Sent from the ActiveMQ - User forum at Nabble.com.
Re: Significance of usageManager
Posted by James Strachan <ja...@gmail.com>.
On 8/25/06, pradeep <pr...@gmail.com> wrote:
>
> 1. What is the significance of usageManager? Why do we need it?
It defines the amount of RAM used by non persistent messaging or the
amount of RAM used to cache messages for persistent messaging
> 3. What happenes when max memory is reached ? Will ActiveMQ stop processing
> further messages from client ?
ActiveMQ stops accepting new messages until messages are consumed.
--
James
-------
http://radio.weblogs.com/0112098/