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From Oleg Proudnikov <ol...@cloudorange.com>
Subject Re: Stress test inconsistencies
Date Tue, 25 Jan 2011 20:58:28 GMT
Brandon Williams <driftx <at> gmail.com> writes:

> 
> On Tue, Jan 25, 2011 at 1:23 PM, Oleg Proudnikov <olegp <at> cloudorange.com>
wrote:
> 
> When I run contrib/stress with a higher thread count, the server does scale to
> 200 inserts a second with latency of 200ms. At the same time Windows desktop
> scales to 900 inserts a second and latency of 120ms. There is a huge difference
> that I am trying to understand and eliminate.
> 
> 
> Those are really low numbers, are you still testing with 10k rows?  That's not
enough, try 1M to give both JVMs enough time to warm up.
> 
> 
> -Brandon 
> 

I agree, Brandon, the numbers are very low! The warm up does not seem to make
any difference though... There is something that is holding the server back
because the CPU is very low. I am trying to understand where this bottleneck is
on the Linux server. I do not think it is Cassandra's config as I use the same
config on Windows and get much higher numbers as I described.

Oleg



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