Re: High cpu usage & segfaulting

Thanks everyone for the feedback. So some additional details... 1. Definitely using Oracle JDK (1.7.0_71-b14) 2. Yes, the segfaulting does go away after a restart 3. No OOM log messages when this occurs 4. We are seeing many GC pauses that take a long time, as in over 2 seconds - we are aware that

Re: High cpu usage & segfaulting

When I see a segfault, my first reaction is to always suspect OpenJDK. Are you using OpenJDK or the Oracle JDK? If you're using the former, I recommend the latter. On Tue, Nov 25, 2014 at 10:40 PM, Otis Gospodnetic < otis.gospodne...@gmail.com> wrote: > Hi Stan, > > Put some monitoring on this.

Re: High cpu usage & segfaulting

Hi Stan, Put some monitoring on this. The first thing I think of when I hear "chewing up CPU" for Java apps is GC. In SPM you can easily see individual JVM memory pools and see if any of them are at (close to) 100%. You can typically correlate that to increased GC tim

Re: High cpu usage & segfaulting

On Tue, Nov 25, 2014 at 8:07 PM, Stan Lemon wrote: > We are using v2.0.11 and have seen several instances in our 24 node > cluster where the node becomes unresponsive, when we look into it we find > that there is a cassandra process chewing up a lot of CPU. There are no > other indications in log

High cpu usage & segfaulting

We are using v2.0.11 and have seen several instances in our 24 node cluster where the node becomes unresponsive, when we look into it we find that there is a cassandra process chewing up a lot of CPU. There are no other indications in logs or anything as to what might be happening, however if we st