Please do volume profile also for around 10 minutes when CPU% is high. On Fri, Aug 17, 2018 at 11:56 AM Pranith Kumar Karampuri < pkara...@redhat.com> wrote:
> As per the output, all io-threads are using a lot of CPU. It is better to > check what the volume profile is to see what is leading to so much work for > io-threads. Please follow the documentation at > https://gluster.readthedocs.io/en/latest/Administrator%20Guide/Monitoring%20Workload/ > section: "Running GlusterFS Volume Profile Command"and attach output of > "gluster > volume profile info", > > On Fri, Aug 17, 2018 at 11:24 AM Hu Bert <revi...@googlemail.com> wrote: > >> Good morning, >> >> i ran the command during 100% CPU usage and attached the file. >> Hopefully it helps. >> >> 2018-08-17 7:33 GMT+02:00 Pranith Kumar Karampuri <pkara...@redhat.com>: >> > Could you do the following on one of the nodes where you are observing >> high >> > CPU usage and attach that file to this thread? We can find what >> > threads/processes are leading to high usage. Do this for say 10 minutes >> when >> > you see the ~100% CPU. >> > >> > top -bHd 5 > /tmp/top.${HOSTNAME}.txt >> > >> > On Wed, Aug 15, 2018 at 2:37 PM Hu Bert <revi...@googlemail.com> wrote: >> >> >> >> Hello again :-) >> >> >> >> The self heal must have finished as there are no log entries in >> >> glustershd.log files anymore. According to munin disk latency (average >> >> io wait) has gone down to 100 ms, and disk utilization has gone down >> >> to ~60% - both on all servers and hard disks. >> >> >> >> But now system load on 2 servers (which were in the good state) >> >> fluctuates between 60 and 100; the server with the formerly failed >> >> disk has a load of 20-30.I've uploaded some munin graphics of the cpu >> >> usage: >> >> >> >> https://abload.de/img/gluster11_cpu31d3a.png >> >> https://abload.de/img/gluster12_cpu8sem7.png >> >> https://abload.de/img/gluster13_cpud7eni.png >> >> >> >> This can't be normal. 2 of the servers under heavy load and one not >> >> that much. Does anyone have an explanation of this strange behaviour? >> >> >> >> >> >> Thx :-) >> >> >> >> 2018-08-14 9:37 GMT+02:00 Hu Bert <revi...@googlemail.com>: >> >> > Hi there, >> >> > >> >> > well, it seems the heal has finally finished. Couldn't see/find any >> >> > related log message; is there such a message in a specific log file? >> >> > >> >> > But i see the same behaviour when the last heal finished: all CPU >> >> > cores are consumed by brick processes; not only by the formerly >> failed >> >> > bricksdd1, but by all 4 brick processes (and their threads). Load >> goes >> >> > up to > 100 on the 2 servers with the not-failed brick, and >> >> > glustershd.log gets filled with a lot of entries. Load on the server >> >> > with the then failed brick not that high, but still ~60. >> >> > >> >> > Is this behaviour normal? Is there some post-heal after a heal has >> >> > finished? >> >> > >> >> > thx in advance :-) >> > >> > >> > >> > -- >> > Pranith >> > > > -- > Pranith > -- Pranith
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