On both larger and smaller clusters i have never had problems with the default values. So i guess thats a pretty good start. ----- Original Message ----- From: "tim taler" <robur314@xxxxxxxxx> To: "Paul Emmerich" <paul.emmerich@xxxxxxxx> Cc: "ceph-users" <ceph-users@xxxxxxxxxxxxxx> Sent: Wednesday, June 12, 2019 3:51:43 PM Subject: Re: ceph threads and performance I will look into that, but: IS there a rule of thumb to determine the optimal setting for osd disk threads and osd op threads ? TIA On Wed, Jun 12, 2019 at 3:22 PM Paul Emmerich <paul.emmerich@xxxxxxxx> wrote: > > > > On Wed, Jun 12, 2019 at 10:57 AM tim taler <robur314@xxxxxxxxx> wrote: >> >> We experience absurd slow i/o in the VMs and I suspect >> our thread settings in ceph.conf to be one of the culprits. > > > this is probably not the cause. But someone might be able to help you if you > share details on your setup (hardware, software) and workload (iops, bandwidth, latency) > > Paul > > -- > Paul Emmerich > > Looking for help with your Ceph cluster? Contact us at https://croit.io > > croit GmbH > Freseniusstr. 31h > 81247 München > www.croit.io > Tel: +49 89 1896585 90 > >> >> Is there a rule of thumb how to get the proper setting? >> What side effect will have a higher threads setting? >> Higer cpu utilisation? higher memory impact? >> >> TIA >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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