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From Peter Schuller <>
Subject Re: Config Maximum heap size for Cassandra
Date Thu, 28 Oct 2010 16:31:37 GMT
> Is that Casandra problem?
> I want Cassandra use memory more effective. How can I do that?

I definitely recommend Jonathan's link, but just to specifically
answer this: It's not a Cassandra issue, it's how the JVM will tend to
behave in particular with the CMS garbage collector. While under the
right circumstances you may get the JVM to avoid growing to maximum
heap size, for practical purposes you should probably expect that it
will grow to maximum heap size eventually.

The way you configure and use Cassandra will determine how much heap
space Cassandra will use in operation. How that translates to "used"
memory from the perspective of the operating system will largely
depend on JVM settings.

/ Peter Schuller

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