Re: nodetool (2.1.18) - Xmx, ParallelGCThreads, High CPU usage

2018-05-29 Thread Chris Lohfink
CPU caused by >> nodetool. >> >> >> >> Regards, >> >> Thomas >> >> >> >> From: kurt greaves [mailto:k...@instaclustr.com] >> Sent: Dienstag, 29. Mai 2018 13:06 >> To: User >> Subject: Re: nodetool (2.1.18) - Xmx,

Re: nodetool (2.1.18) - Xmx, ParallelGCThreads, High CPU usage

2018-05-29 Thread kurt greaves
nting me to the Xmx issue. > > > > JIRA + patch (for Linux only based on C* 3.11) for the parallel GC thread > issue is available here: > https://issues.apache.org/jira/browse/CASSANDRA-14475 > > > > Thanks, > > Thomas > > > > *From:* kurt greaves [

RE: nodetool (2.1.18) - Xmx, ParallelGCThreads, High CPU usage

2018-05-29 Thread Steinmaurer, Thomas
...@instaclustr.com] Sent: Dienstag, 29. Mai 2018 13:06 To: User Subject: Re: nodetool (2.1.18) - Xmx, ParallelGCThreads, High CPU usage Thanks Thomas. After a bit more research today I found that the whole $MAX_HEAP_SIZE issue isn't really a problem because we don't explicitly set -Xms so the minimum

Re: nodetool (2.1.18) - Xmx, ParallelGCThreads, High CPU usage

2018-05-29 Thread kurt greaves
.apache.org/ > jira/browse/CASSANDRA-14475 > > > > Thanks, > > Thomas > > > > *From:* kurt greaves [mailto:k...@instaclustr.com] > *Sent:* Dienstag, 29. Mai 2018 05:54 > *To:* User > *Subject:* Re: nodetool (2.1.18) - Xmx, ParallelGCThreads, High CPU usag

RE: nodetool (2.1.18) - Xmx, ParallelGCThreads, High CPU usage

2018-05-29 Thread Steinmaurer, Thomas
2018 05:54 To: User Subject: Re: nodetool (2.1.18) - Xmx, ParallelGCThreads, High CPU usage 1) nodetool is reusing the $MAX_HEAP_SIZE environment variable, thus if we are running Cassandra with e.g. Xmx31G, nodetool is started with Xmx31G as well This was fixed in 3.0.11/3.10 in CASSANDRA-12739

Re: nodetool (2.1.18) - Xmx, ParallelGCThreads, High CPU usage

2018-05-28 Thread kurt greaves
> > 1) nodetool is reusing the $MAX_HEAP_SIZE environment variable, thus if we > are running Cassandra with e.g. Xmx31G, nodetool is started with Xmx31G as > well This was fixed in 3.0.11/3.10 in CASSANDRA-12739 . Not sure why it didn't make

nodetool (2.1.18) - Xmx, ParallelGCThreads, High CPU usage

2018-05-28 Thread Steinmaurer, Thomas
Hello, on a quite capable machine with 32 physical cores (64 vCPUs) we see sporadic CPU usage up to 50% caused by nodetool on this box, thus digged a bit further. A few observations: 1) nodetool is reusing the $MAX_HEAP_SIZE environment variable, thus if we are running Cassandra with e.g.