On 12/07/2016 04:20 PM, Francois Lafont wrote:
On 12/07/2016 11:16 PM, Steve Taylor wrote:
I'm seeing the same behavior with very similar perf top output. One server with 32 OSDs has a load average approaching 800. No excessive memory usage and no iowait at all.
Exactly!
And another interesting information (maybe). I have ceph-osd process with big cpu load (as Steve said no iowait and no excessive memory usage). If I restart the ceph-osd daemon cpu load becomes OK during exactly 15 minutes for me. After 15 minutes, I have the cpu load again. It's curious this number of 15 minutes, isn't it?
Interesting - seeing the same thing; restarted all OSDs on one node and
saw pretty much the same period of 15 minutes normal cpu use before
soaring up again (to loadav 3000 on this particular node).
--
Graham Allan
Minnesota Supercomputing Institute - gta@xxxxxxx
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