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From James Golick <jamesgol...@gmail.com>
Subject Re: Continuously increasing RAM usage
Date Thu, 27 May 2010 17:05:44 GMT
Just upgraded to Sun JVM 1.6.0_20 and cassandra 0.6.2. Will report back when
I have data.

On Thu, May 27, 2010 at 9:39 AM, Philip Stanhope <pstanhope@wimba.com>wrote:

> I've seen numerous anecdotal references that the Sun JVM performs better.
>
> Is there a reason why the debian packaging for Cassandra installs the
> OpenJDK version?
> What would it take to create an alternative apt-get package that pulls Sun
> JVM rather than OpenJDK?
>
> -phil
>
> On May 27, 2010, at 12:33 PM, Daniel Kluesing wrote:
>
> 0.6.0 had some gc issues, (I think
> https://issues.apache.org/jira/browse/CASSANDRA-1014) if you see lots of
> gc collections in the logs, I’d give 0.6.1 a try, I found it much better.
>
> Anecdotally, the sun jvm performs better than openJDK, and the u19 drop
> fixes some jvm bugs that can cause memory problems. Sun jvm, u19 (or higher)
> and Cassandra 0.6.1 fixed a lot of memory problems I ran into.
>
> *From:* James Golick [mailto:jamesgolick@gmail.com]
> *Sent:* Thursday, May 27, 2010 9:05 AM
> *To:* user@cassandra.apache.org
> *Subject:* Re: Continuously increasing RAM usage
>
> When I say unresponsive, I mean that latency becomes very high. Swap is
> turned off, but before I turned it on, it used to swap heavily at this
> point.
>
> Cassandra version is 0.6.0 Beta1
>
> [cassandra1 ~]# java -version
> java version "1.6.0"
> OpenJDK  Runtime Environment (build 1.6.0-b09)
> OpenJDK 64-Bit Server VM (build 1.6.0-b09, mixed mode)
>
> Here is the tpstats from a node that was restarted last night:
>
> http://gist.github.com/415987
>
> On Thu, May 27, 2010 at 8:51 AM, Robert Coli <rcoli@digg.com> wrote:
> On 5/26/10 11:32 PM, James Golick wrote:
> We're seeing RAM usage continually climb until eventually, cassandra
> becomes unresponsive.
>
> Given the handful of bugs related to memory bloat in specific versions of
> Cassandra combined with specific versions of JVMs, that information may be
> relevant to your question. What version are you running, and in what JVM
> environment?
>
> =Rob
>
>
>
>

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