Re: [ceph-users] isolate_freepages_block and excessive CPU usage by OSD process

2014-11-24 Thread Vlastimil Babka
On 11/15/2014 06:10 PM, Andrey Korolyov wrote: > On Sat, Nov 15, 2014 at 7:32 PM, Vlastimil Babka wrote: >> On 11/15/2014 12:48 PM, Andrey Korolyov wrote: >>> Hello, >>> >>> I had found recently that the OSD daemons under certain conditions >>> (moderate vm pressure, moderate I/O, slightly altered

Re: [ceph-users] isolate_freepages_block and excessive CPU usage by OSD process

2014-11-24 Thread Vlastimil Babka
On 11/15/2014 12:48 PM, Andrey Korolyov wrote: > Hello, > > I had found recently that the OSD daemons under certain conditions > (moderate vm pressure, moderate I/O, slightly altered vm settings) can > go into loop involving isolate_freepages and effectively hit Ceph > cluster performance. I found

Re: [ceph-users] isolate_freepages_block and excessive CPU usage by OSD process

2014-11-15 Thread Andrey Korolyov
On Sat, Nov 15, 2014 at 9:45 PM, Vlastimil Babka wrote: > On 11/15/2014 06:10 PM, Andrey Korolyov wrote: >> On Sat, Nov 15, 2014 at 7:32 PM, Vlastimil Babka wrote: >>> On 11/15/2014 12:48 PM, Andrey Korolyov wrote: Hello, I had found recently that the OSD daemons under certain cond

Re: [ceph-users] isolate_freepages_block and excessive CPU usage by OSD process

2014-11-15 Thread Andrey Korolyov
On Sat, Nov 15, 2014 at 7:32 PM, Vlastimil Babka wrote: > On 11/15/2014 12:48 PM, Andrey Korolyov wrote: >> Hello, >> >> I had found recently that the OSD daemons under certain conditions >> (moderate vm pressure, moderate I/O, slightly altered vm settings) can >> go into loop involving isolate_fr