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On Thu, Jun 17, 2010 at 4:53 PM, Peter Schuller
wrote:
>> drive on an EBS volume). Does that pattern look bad or is it
>> relatively normal? If it's not normal, any advice for what I should
>> change to get better performance?
>
> Assuming you're running with the default cassandra VM options o
On Thu, Jun 17, 2010 at 04:01:41PM -0400, Mike Subelsky wrote:
> I just started munin to monitor the performance of my cluster which is
> working great. I noticed the attached pattern for JVM heap size -
> lots of peaks and valleys, which looks like GC is firing pretty
> frequently. I don't have
> drive on an EBS volume). Does that pattern look bad or is it
> relatively normal? If it's not normal, any advice for what I should
> change to get better performance?
Assuming you're running with the default cassandra VM options or
similar (mainly, the CMS GC), the graph looks fairly normal to
That looks pretty normal to me. The JVM doesn't do a full GC until
the old gen crosses a (dynamic, defaults to about 70% of heap)
threshold.
On Thu, Jun 17, 2010 at 1:01 PM, Mike Subelsky wrote:
> I just started munin to monitor the performance of my cluster which is
> working great. I noticed
