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From Huming Wu <>
Subject Re: Cassandra performance
Date Thu, 20 Aug 2009 00:32:18 GMT
On Tue, Aug 18, 2009 at 12:02 PM, Michael
Greene<> wrote:
> According to the HBase guys and confirmed by
> on an 8-core machine you are not going to want to enable
> -XX:+CMSIncrementalMode -- it is for 1 or 2 core machines that are
> using the CMS GC.  This should affect your latency numbers positively,
> but I wouldn't see it changing the CPU usage much.

Looks I do need to use the incremental GC though otherwise the memory
growth is very fast... On the get_slice CPU, I tried the profiling (on
single node and low load 1 get_slice call per second) and it looks sucks up all CPU.
Here is the snapshot
(sounds an issue in thrift). Any idea?


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