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Posted to user@cassandra.apache.org by Manu Zhang <ow...@gmail.com> on 2012/10/15 17:02:43 UTC
Why my Cassandra is compacting like mad
My Cassandra is compacting like mad (look at the following messages) after
I restart it after a timeout query. It won't stop until I kill the process.
INFO 22:57:41,839 Compacting
[SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1258-Data.db')]
INFO 22:57:42,077 Compacted to
[/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1259-Data.db,].
4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.017539MB/s.
Time: 238ms.
INFO 22:57:42,079 Compacting
[SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1259-Data.db')]
INFO 22:57:42,309 Compacted to
[/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1260-Data.db,].
4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.018149MB/s.
Time: 230ms.
INFO 22:57:42,311 Compacting
[SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1260-Data.db')]
INFO 22:57:42,574 Compacted to
[/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1261-Data.db,].
4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.015872MB/s.
Time: 263ms.
INFO 22:57:42,576 Compacting
[SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1261-Data.db')]
INFO 22:57:42,814 Compacted to
[/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1262-Data.db,].
4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.017539MB/s.
Time: 238ms.
INFO 22:57:42,816 Compacting
[SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1262-Data.db')]
INFO 22:57:43,070 Compacted to
[/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1263-Data.db,].
4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.016434MB/s.
Time: 254ms.
Re: Why my Cassandra is compacting like mad
Posted by Alain RODRIGUEZ <ar...@gmail.com>.
Well I guess we will need some information to help you...
At least:
-Hardware ?
-Version of Cassandra ?
-Any specific action before restarting ?
-cassandra.yaml (options about compaction) ?
-...
Alain
2012/10/15 Manu Zhang <ow...@gmail.com>
> My Cassandra is compacting like mad (look at the following messages) after
> I restart it after a timeout query. It won't stop until I kill the process.
>
>
> INFO 22:57:41,839 Compacting
> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1258-Data.db')]
> INFO 22:57:42,077 Compacted to
> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1259-Data.db,].
> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.017539MB/s.
> Time: 238ms.
> INFO 22:57:42,079 Compacting
> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1259-Data.db')]
> INFO 22:57:42,309 Compacted to
> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1260-Data.db,].
> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.018149MB/s.
> Time: 230ms.
> INFO 22:57:42,311 Compacting
> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1260-Data.db')]
> INFO 22:57:42,574 Compacted to
> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1261-Data.db,].
> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.015872MB/s.
> Time: 263ms.
> INFO 22:57:42,576 Compacting
> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1261-Data.db')]
> INFO 22:57:42,814 Compacted to
> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1262-Data.db,].
> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.017539MB/s.
> Time: 238ms.
> INFO 22:57:42,816 Compacting
> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1262-Data.db')]
> INFO 22:57:43,070 Compacted to
> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1263-Data.db,].
> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.016434MB/s.
> Time: 254ms.
>
Re: Why my Cassandra is compacting like mad
Posted by Manu Zhang <ow...@gmail.com>.
oh, forgot to mention that my Cassandra is 1.2beta-2
On Mon, Oct 15, 2012 at 11:11 PM, Michael Kjellman
<mk...@barracuda.com>wrote:
> I had a similar bug with 1.1.5 but I couldn't reproduce it so I didn't
> file a bug. I did a rolling restart of my nodes and things went back to
> normal.
>
> From: Manu Zhang <ow...@gmail.com>
> Reply-To: "user@cassandra.apache.org" <us...@cassandra.apache.org>
> Date: Monday, October 15, 2012 8:02 AM
> To: "user@cassandra.apache.org" <us...@cassandra.apache.org>
> Subject: Why my Cassandra is compacting like mad
>
> My Cassandra is compacting like mad (look at the following messages) after
> I restart it after a timeout query. It won't stop until I kill the process.
>
>
> INFO 22:57:41,839 Compacting
> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1258-Data.db')]
> INFO 22:57:42,077 Compacted to
> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1259-Data.db,].
> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.017539MB/s.
> Time: 238ms.
> INFO 22:57:42,079 Compacting
> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1259-Data.db')]
> INFO 22:57:42,309 Compacted to
> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1260-Data.db,].
> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.018149MB/s.
> Time: 230ms.
> INFO 22:57:42,311 Compacting
> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1260-Data.db')]
> INFO 22:57:42,574 Compacted to
> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1261-Data.db,].
> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.015872MB/s.
> Time: 263ms.
> INFO 22:57:42,576 Compacting
> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1261-Data.db')]
> INFO 22:57:42,814 Compacted to
> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1262-Data.db,].
> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.017539MB/s.
> Time: 238ms.
> INFO 22:57:42,816 Compacting
> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1262-Data.db')]
> INFO 22:57:43,070 Compacted to
> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1263-Data.db,].
> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.016434MB/s.
> Time: 254ms.
>
> ----------------------------------
> 'Like' us on Facebook for exclusive content and other resources on all
> Barracuda Networks solutions.
> Visit http://barracudanetworks.com/facebook
>
>
Re: Why my Cassandra is compacting like mad
Posted by Manu Zhang <ow...@gmail.com>.
only 1/8 of heap is used. Only system-schema_columns cf is compacted. The
weird thing is that it never stops itself.
On Tue, Oct 16, 2012 at 5:14 PM, Alain RODRIGUEZ <ar...@gmail.com> wrote:
> "I don't what hardware information may help"
>
> A low memory server will produce an intensive use of CPU and disk IO. It
> will write a lot of small SSTables which will need to be compacted very
> often. That was one of my thought when I asked.
>
> Alain
>
>
> 2012/10/15 Manu Zhang <ow...@gmail.com>
>
>> I use default option for compaction:
>> in_memory_compaction_limit_in_mb: 64
>> multithreaded_compaction: false
>> compaction_throughput_mb_per_sec: 16
>> compaction_preheat_key_cache: true
>>
>>
>> I aborted Cassandra after a timeout query;
>> my Cassandra is 1.2beta-2
>> I don't what hardware information may help
>>
>>
>> On Mon, Oct 15, 2012 at 11:19 PM, Michael Kjellman <
>> mkjellman@barracuda.com> wrote:
>>
>>> And to clarify my reply, this was a loop in compactions on
>>> system-schema_columns specifically.
>>>
>>> From: Michael Kjellman <mk...@barracuda.com>
>>> Reply-To: "user@cassandra.apache.org" <us...@cassandra.apache.org>
>>> Date: Monday, October 15, 2012 8:11 AM
>>> To: "user@cassandra.apache.org" <us...@cassandra.apache.org>
>>> Subject: Re: Why my Cassandra is compacting like mad
>>>
>>> I had a similar bug with 1.1.5 but I couldn't reproduce it so I didn't
>>> file a bug. I did a rolling restart of my nodes and things went back to
>>> normal.
>>>
>>> From: Manu Zhang <ow...@gmail.com>
>>> Reply-To: "user@cassandra.apache.org" <us...@cassandra.apache.org>
>>> Date: Monday, October 15, 2012 8:02 AM
>>> To: "user@cassandra.apache.org" <us...@cassandra.apache.org>
>>> Subject: Why my Cassandra is compacting like mad
>>>
>>> My Cassandra is compacting like mad (look at the following messages)
>>> after I restart it after a timeout query. It won't stop until I kill the
>>> process.
>>>
>>>
>>> INFO 22:57:41,839 Compacting
>>> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1258-Data.db')]
>>> INFO 22:57:42,077 Compacted to
>>> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1259-Data.db,].
>>> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.017539MB/s.
>>> Time: 238ms.
>>> INFO 22:57:42,079 Compacting
>>> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1259-Data.db')]
>>> INFO 22:57:42,309 Compacted to
>>> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1260-Data.db,].
>>> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.018149MB/s.
>>> Time: 230ms.
>>> INFO 22:57:42,311 Compacting
>>> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1260-Data.db')]
>>> INFO 22:57:42,574 Compacted to
>>> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1261-Data.db,].
>>> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.015872MB/s.
>>> Time: 263ms.
>>> INFO 22:57:42,576 Compacting
>>> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1261-Data.db')]
>>> INFO 22:57:42,814 Compacted to
>>> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1262-Data.db,].
>>> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.017539MB/s.
>>> Time: 238ms.
>>> INFO 22:57:42,816 Compacting
>>> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1262-Data.db')]
>>> INFO 22:57:43,070 Compacted to
>>> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1263-Data.db,].
>>> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.016434MB/s.
>>> Time: 254ms.
>>>
>>> ----------------------------------
>>> 'Like' us on Facebook for exclusive content and other resources on all
>>> Barracuda Networks solutions.
>>> Visit http://barracudanetworks.com/facebook
>>>
>>>
>>> ----------------------------------
>>> 'Like' us on Facebook for exclusive content and other resources on all
>>> Barracuda Networks solutions.
>>> Visit http://barracudanetworks.com/facebook
>>>
>>>
>>
>>
>
Re: Why my Cassandra is compacting like mad
Posted by Alain RODRIGUEZ <ar...@gmail.com>.
"I don't what hardware information may help"
A low memory server will produce an intensive use of CPU and disk IO. It
will write a lot of small SSTables which will need to be compacted very
often. That was one of my thought when I asked.
Alain
2012/10/15 Manu Zhang <ow...@gmail.com>
> I use default option for compaction:
> in_memory_compaction_limit_in_mb: 64
> multithreaded_compaction: false
> compaction_throughput_mb_per_sec: 16
> compaction_preheat_key_cache: true
>
>
> I aborted Cassandra after a timeout query;
> my Cassandra is 1.2beta-2
> I don't what hardware information may help
>
>
> On Mon, Oct 15, 2012 at 11:19 PM, Michael Kjellman <
> mkjellman@barracuda.com> wrote:
>
>> And to clarify my reply, this was a loop in compactions on
>> system-schema_columns specifically.
>>
>> From: Michael Kjellman <mk...@barracuda.com>
>> Reply-To: "user@cassandra.apache.org" <us...@cassandra.apache.org>
>> Date: Monday, October 15, 2012 8:11 AM
>> To: "user@cassandra.apache.org" <us...@cassandra.apache.org>
>> Subject: Re: Why my Cassandra is compacting like mad
>>
>> I had a similar bug with 1.1.5 but I couldn't reproduce it so I didn't
>> file a bug. I did a rolling restart of my nodes and things went back to
>> normal.
>>
>> From: Manu Zhang <ow...@gmail.com>
>> Reply-To: "user@cassandra.apache.org" <us...@cassandra.apache.org>
>> Date: Monday, October 15, 2012 8:02 AM
>> To: "user@cassandra.apache.org" <us...@cassandra.apache.org>
>> Subject: Why my Cassandra is compacting like mad
>>
>> My Cassandra is compacting like mad (look at the following messages)
>> after I restart it after a timeout query. It won't stop until I kill the
>> process.
>>
>>
>> INFO 22:57:41,839 Compacting
>> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1258-Data.db')]
>> INFO 22:57:42,077 Compacted to
>> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1259-Data.db,].
>> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.017539MB/s.
>> Time: 238ms.
>> INFO 22:57:42,079 Compacting
>> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1259-Data.db')]
>> INFO 22:57:42,309 Compacted to
>> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1260-Data.db,].
>> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.018149MB/s.
>> Time: 230ms.
>> INFO 22:57:42,311 Compacting
>> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1260-Data.db')]
>> INFO 22:57:42,574 Compacted to
>> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1261-Data.db,].
>> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.015872MB/s.
>> Time: 263ms.
>> INFO 22:57:42,576 Compacting
>> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1261-Data.db')]
>> INFO 22:57:42,814 Compacted to
>> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1262-Data.db,].
>> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.017539MB/s.
>> Time: 238ms.
>> INFO 22:57:42,816 Compacting
>> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1262-Data.db')]
>> INFO 22:57:43,070 Compacted to
>> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1263-Data.db,].
>> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.016434MB/s.
>> Time: 254ms.
>>
>> ----------------------------------
>> 'Like' us on Facebook for exclusive content and other resources on all
>> Barracuda Networks solutions.
>> Visit http://barracudanetworks.com/facebook
>>
>>
>> ----------------------------------
>> 'Like' us on Facebook for exclusive content and other resources on all
>> Barracuda Networks solutions.
>> Visit http://barracudanetworks.com/facebook
>>
>>
>
>
Re: Why my Cassandra is compacting like mad
Posted by Manu Zhang <ow...@gmail.com>.
I use default option for compaction:
in_memory_compaction_limit_in_mb: 64
multithreaded_compaction: false
compaction_throughput_mb_per_sec: 16
compaction_preheat_key_cache: true
I aborted Cassandra after a timeout query;
my Cassandra is 1.2beta-2
I don't what hardware information may help
On Mon, Oct 15, 2012 at 11:19 PM, Michael Kjellman
<mk...@barracuda.com>wrote:
> And to clarify my reply, this was a loop in compactions on
> system-schema_columns specifically.
>
> From: Michael Kjellman <mk...@barracuda.com>
> Reply-To: "user@cassandra.apache.org" <us...@cassandra.apache.org>
> Date: Monday, October 15, 2012 8:11 AM
> To: "user@cassandra.apache.org" <us...@cassandra.apache.org>
> Subject: Re: Why my Cassandra is compacting like mad
>
> I had a similar bug with 1.1.5 but I couldn't reproduce it so I didn't
> file a bug. I did a rolling restart of my nodes and things went back to
> normal.
>
> From: Manu Zhang <ow...@gmail.com>
> Reply-To: "user@cassandra.apache.org" <us...@cassandra.apache.org>
> Date: Monday, October 15, 2012 8:02 AM
> To: "user@cassandra.apache.org" <us...@cassandra.apache.org>
> Subject: Why my Cassandra is compacting like mad
>
> My Cassandra is compacting like mad (look at the following messages) after
> I restart it after a timeout query. It won't stop until I kill the process.
>
>
> INFO 22:57:41,839 Compacting
> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1258-Data.db')]
> INFO 22:57:42,077 Compacted to
> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1259-Data.db,].
> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.017539MB/s.
> Time: 238ms.
> INFO 22:57:42,079 Compacting
> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1259-Data.db')]
> INFO 22:57:42,309 Compacted to
> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1260-Data.db,].
> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.018149MB/s.
> Time: 230ms.
> INFO 22:57:42,311 Compacting
> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1260-Data.db')]
> INFO 22:57:42,574 Compacted to
> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1261-Data.db,].
> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.015872MB/s.
> Time: 263ms.
> INFO 22:57:42,576 Compacting
> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1261-Data.db')]
> INFO 22:57:42,814 Compacted to
> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1262-Data.db,].
> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.017539MB/s.
> Time: 238ms.
> INFO 22:57:42,816 Compacting
> [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1262-Data.db')]
> INFO 22:57:43,070 Compacted to
> [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1263-Data.db,].
> 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.016434MB/s.
> Time: 254ms.
>
> ----------------------------------
> 'Like' us on Facebook for exclusive content and other resources on all
> Barracuda Networks solutions.
> Visit http://barracudanetworks.com/facebook
>
>
> ----------------------------------
> 'Like' us on Facebook for exclusive content and other resources on all
> Barracuda Networks solutions.
> Visit http://barracudanetworks.com/facebook
>
>
Re: Why my Cassandra is compacting like mad
Posted by Michael Kjellman <mk...@barracuda.com>.
And to clarify my reply, this was a loop in compactions on system-schema_columns specifically.
From: Michael Kjellman <mk...@barracuda.com>>
Reply-To: "user@cassandra.apache.org<ma...@cassandra.apache.org>" <us...@cassandra.apache.org>>
Date: Monday, October 15, 2012 8:11 AM
To: "user@cassandra.apache.org<ma...@cassandra.apache.org>" <us...@cassandra.apache.org>>
Subject: Re: Why my Cassandra is compacting like mad
I had a similar bug with 1.1.5 but I couldn't reproduce it so I didn't file a bug. I did a rolling restart of my nodes and things went back to normal.
From: Manu Zhang <ow...@gmail.com>>
Reply-To: "user@cassandra.apache.org<ma...@cassandra.apache.org>" <us...@cassandra.apache.org>>
Date: Monday, October 15, 2012 8:02 AM
To: "user@cassandra.apache.org<ma...@cassandra.apache.org>" <us...@cassandra.apache.org>>
Subject: Why my Cassandra is compacting like mad
My Cassandra is compacting like mad (look at the following messages) after I restart it after a timeout query. It won't stop until I kill the process.
INFO 22:57:41,839 Compacting [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1258-Data.db')]
INFO 22:57:42,077 Compacted to [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1259-Data.db,]. 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.017539MB/s. Time: 238ms.
INFO 22:57:42,079 Compacting [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1259-Data.db')]
INFO 22:57:42,309 Compacted to [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1260-Data.db,]. 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.018149MB/s. Time: 230ms.
INFO 22:57:42,311 Compacting [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1260-Data.db')]
INFO 22:57:42,574 Compacted to [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1261-Data.db,]. 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.015872MB/s. Time: 263ms.
INFO 22:57:42,576 Compacting [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1261-Data.db')]
INFO 22:57:42,814 Compacted to [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1262-Data.db,]. 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.017539MB/s. Time: 238ms.
INFO 22:57:42,816 Compacting [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1262-Data.db')]
INFO 22:57:43,070 Compacted to [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1263-Data.db,]. 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.016434MB/s. Time: 254ms.
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Re: Why my Cassandra is compacting like mad
Posted by Michael Kjellman <mk...@barracuda.com>.
I had a similar bug with 1.1.5 but I couldn't reproduce it so I didn't file a bug. I did a rolling restart of my nodes and things went back to normal.
From: Manu Zhang <ow...@gmail.com>>
Reply-To: "user@cassandra.apache.org<ma...@cassandra.apache.org>" <us...@cassandra.apache.org>>
Date: Monday, October 15, 2012 8:02 AM
To: "user@cassandra.apache.org<ma...@cassandra.apache.org>" <us...@cassandra.apache.org>>
Subject: Why my Cassandra is compacting like mad
My Cassandra is compacting like mad (look at the following messages) after I restart it after a timeout query. It won't stop until I kill the process.
INFO 22:57:41,839 Compacting [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1258-Data.db')]
INFO 22:57:42,077 Compacted to [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1259-Data.db,]. 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.017539MB/s. Time: 238ms.
INFO 22:57:42,079 Compacting [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1259-Data.db')]
INFO 22:57:42,309 Compacted to [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1260-Data.db,]. 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.018149MB/s. Time: 230ms.
INFO 22:57:42,311 Compacting [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1260-Data.db')]
INFO 22:57:42,574 Compacted to [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1261-Data.db,]. 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.015872MB/s. Time: 263ms.
INFO 22:57:42,576 Compacting [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1261-Data.db')]
INFO 22:57:42,814 Compacted to [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1262-Data.db,]. 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.017539MB/s. Time: 238ms.
INFO 22:57:42,816 Compacting [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1262-Data.db')]
INFO 22:57:43,070 Compacted to [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1263-Data.db,]. 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.016434MB/s. Time: 254ms.
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