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From Віталій Тимчишин <tiv...@gmail.com>
Subject Re: Cassandra OOM
Date Fri, 13 Jan 2012 12:38:12 GMT
2012/1/4 Vitalii Tymchyshyn <tivv00@gmail.com>

> 04.01.12 14:25, Radim Kolar написав(ла):
>
>  > So, what are cassandra memory requirement? Is it 1% or 2% of disk data?
>> It depends on number of rows you have. if you have lot of rows then
>> primary memory eaters are index sampling data and bloom filters. I use
>> index sampling 512 and bloom filters set to 4% to cut down memory needed.
>>
> I've raised index sampling and bloom filter setting seems not to be on
> trunk yet. For me memtables is what's eating heap :(
>
>
Hello, all.

I've found out and fixed the problem today (after one my node OOMed
constantly replaying heap on start-up). full-key deletes are not accounted
and so column families with delete-only operations are not flushed. Here is
Jira: https://issues.apache.org/jira/browse/CASSANDRA-3741 and my pull
request to fix it: https://github.com/apache/cassandra/pull/5

Best regards, Vitalii Tymchyshyn

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