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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Problem with JVM? concurrent mode failure
Date Wed, 28 Apr 2010 14:44:13 GMT
Yes, incremental mode is definitely contraindicated for Cassandra.

On Wed, Apr 28, 2010 at 1:07 AM, Peter Schuller
<peter.schuller@infidyne.com> wrote:
>>         -XX:+CMSIncrementalMode \
>>         -XX:+CMSIncrementalPacing \
>
> This may  not be an issue given your other VM opts, but just FYI I
> have had some difficulty making the incremental CMS mode perform GC
> work sufficiently aggressively to avoid concurrent mode failures
> during significant garbage generation.
>
> You may want to give CMS a try in non-incremental mode (i.e., the
> concurrent mark phase will be done in one burst, rather than spread
> out over time, but still concurrently).
>
> --
> / Peter Schuller
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com

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