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From DOrlov <dor...@redaril.com>
Subject Re: TomCat 6 performance issues
Date Tue, 22 Dec 2009 08:10:48 GMT



Leon Rosenberg-3 wrote:
> 
> Hello,
> 
> you should switch on GC logs and check whether the delays happen at
> the Full GC Time.
> You should also start with Xms = Xmx -> both 6144 (why exactly 6144? :-)
> ).
> 
> -verbose:gc
> -XX:+PrintGCTimeStamps
> -XX:+PrintGCDetails
> 

Thank you for comment I will change Xmx, Xms (about 6144, it was set by our
admin :)))
About GC logging, I'm afraid that logging will reduce performance (I've
written, that this is production server). Do you have any figures of
performance lacks whith 'on' GC logging? 

We tried to reproduce issue by collecting production logs and reproducing
them via tcpreplay to test server, but we weren't able to reproduce issue
:((

Thanks,
Denis. 

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