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From David Boxenhorn <da...@daotown.com>
Subject Re: Nodes frozen in GC
Date Tue, 08 Mar 2011 10:06:53 GMT
If RF=2 and CL= QUORUM, you're getting no benefit from replication. When a
node is in GC it stops everything. Set RF=3, so when one node is busy the
cluster will still work.

On Tue, Mar 8, 2011 at 11:46 AM, ruslan usifov <ruslan.usifov@gmail.com>wrote:

>
>
> 2011/3/8 Chris Goffinet <cg@chrisgoffinet.com>
>
>> How large are your SSTables on disk? My thought was because you have so
>> many on disk, we have to store the bloom filter + every 128 keys from index
>> in memory.
>>
>>
> 0.5GB
>  But as I understand store in memory happens only when read happens, i do
> only inserts. And i think that memory doesn't problem, because heap
> allocations looks like saw (in max Heap allocations get about 5,5 GB then
> they reduce to 2GB)
>
>
> Also when i increase Heap Size to 7GB, situation stay mach better, but
> nodes frozen still happens, and in gc.log I steel see:
>
> Total time for which application threads were stopped: 20.0686307 seconds
>
> lines (right not so often, like before)
>

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