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From Robert Coli <rc...@eventbrite.com>
Subject Re: Lots of deletions results in death by GC
Date Wed, 05 Feb 2014 00:15:44 GMT
On Tue, Feb 4, 2014 at 4:10 PM, Robert Wille <rwille@fold3.com> wrote:

> I would almost think that this is caused by high load on the server, but
> I've never seen CPU utilization go above about two of my eight available
> cores. If high load triggers this problem, then that is very disconcerting.
> That means that a CPU spike could permanently cripple a node. Okay, not
> permanently, but until a manual flush occurs.
>

While it is unlikely to be related to CPU (i/o much more likely...), the
JVM is certainly capable of finding itself in a low-heap situation which :

1) performs very poorly
2) does not crash
3) and cannot be recovered from

This usually requires a restart of the JVM. This mental model should be an
expectation for any application running in the JVM.

=Rob

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