On Thu, May 12, 2016 at 3:44 PM, Jonathan Moules <
jonathan-li...@lightpear.com> wrote:
> Hi Ian,
> Thanks for the suggestion but we don't think it's that. On the PG box
> there were no logs indicating that the pool had run out, and on the
> GeoServer side I can't seem to hit the pool limit when it's as low as 20
> but using 98 threads to test a single instance.
>
> We're thinking the behaviour we're seeing seems more like garbage
> collection locking up an set of instances for a while (once its freed up,
> those instances were going better than the not-locked-up ones). Is GC a
> plausible mechanism?
>
>
You can use VisualVM connected to the JVM to see if and when it's running
GC.
Do you have high CPU usage during the slowdonw?
Cheers
Andrea
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