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From "ssivikt@gmail.com" <ssiv...@gmail.com>
Subject Re: C* memory leak during compaction
Date Tue, 15 Mar 2016 09:49:32 GMT
Duplicate the answer from Russell Hatch

On 03/14/2016 07:32 PM, Russell Hatch wrote:
> Of course, no problem.
>
> On Sat, Mar 12, 2016 at 3:35 PM, ssivikt@gmail.com 
> <mailto:ssivikt@gmail.com> <ssivikt@gmail.com 
> <mailto:ssivikt@gmail.com>> wrote:
>
>     Hi,
>
>     Thank you for you reply!
>     The thing is that I've only inserted the data and just waiting
>     until compaction is finished. C* process allocates all available
>     memory during compaction... I'd added swap ~700GB and C* has
>     occupied it too..
>
>     Will itl be "ok" if I duplicate your answer to user@cassandra ?
>
>     On 03/12/2016 02:46 AM, Russell Hatch wrote:
>>     Hi there -- not sure if anyone got back to you on this question.
>>     I think I saw your question on irc the other day -- I'm not aware
>>     of any memory specific issues with 2.2.5.
>>
>>     It might be worthwhile to see if you have any very large
>>     partitions in your database, and any potential code that could be
>>     trying to retrieve those very large partitions -- I think that
>>     could be one source for a problem such as this.
>>
>>     You might get some more traction on your question using the
>>     regular cassandra mailing list (this list is for development of
>>     cassandra itself, not development with cassandra).
>>
>>     Cheers,
>>
>>     Russ
>>
>>     On Fri, Mar 11, 2016 at 5:38 AM, ssivikt@gmail.com
>>     <mailto:ssivikt@gmail.com> <ssivikt@gmail.com
>>     <mailto:ssivikt@gmail.com>> wrote:
>>
>>         I have 7 nodes of C* v2.2.5 running on CentOS 7 and using
>>         jemalloc for dynamic storage allocation.
>>         Use only one keyspace and one table with Leveled compaction
>>         strategy.
>>         I've loaded ~500 GB of data into the cluster with replication
>>         factor equals to 3 and waiting until compaction is finished.
>>         But during compaction each of the C* nodes allocates all the
>>         available memory (~128GB) and just stops its process.
>>
>>         This is a known bug ?
>>
>>         -- 
>>         Thanks,
>>         Serj
>>
>>
>
>     -- 
>     Thanks,
>     Serj
>
>

-- 
Thanks,
Serj


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