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From Jason Wee <peich...@gmail.com>
Subject Re: cassandra 1.0.8 memory usage
Date Thu, 11 Oct 2012 17:52:15 GMT
what jvm version?

On Thu, Oct 11, 2012 at 2:04 PM, Daniel Woo <daniel.y.woo@gmail.com> wrote:

> Hi guys,
>
> I am running a mini cluster with 6 nodes, recently we see very frequent
> ParNewGC on two nodes. It takes 200 - 800 ms on average, sometimes it takes
> 5 seconds. You know, hte ParNewGC is stop-of-wolrd GC and our client throws
> SocketTimeoutException every 3 minutes.
>
> I checked the load, it seems well balanced, and the two nodes are running
> on the same hardware: 2 * 4 cores xeon with 16G RAM, we give cassandrda 4G
> heap, including 800MB young generation. We did not see any swap usage
> during the GC, any idea about this?
>
> Then I took a heap dump, it shows that 5 instances of JmxMBeanServer holds
> 500MB memory and most of the referenced objects are JMX mbean related, it's
> kind of wired to me and looks like a memory leak.
>
> --
> Thanks & Regards,
> Daniel
>

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