I am using osd_memory_target ( http://docs.ceph.com/docs/nautilus/rados/configuration/bluestore-config-ref/#automatic-cache-sizing) for this purpose and it works flawless. Kept working after upgrading from mimic to nautilus.
Jonathan Proulx <j...@csail.mit.edu> schrieb am Di., 16. Apr. 2019, 18:06: > Hi All, > > I have a a few servers that are a bit undersized on RAM for number of > osds they run. > > When we swithced to bluestore about 1yr ago I'd "fixed" this (well > kept them from OOMing) by setting bluestore_cache_size_ssd and > bluestore_cache_size_hdd, this worked. > > after upgrading to Nautilus the OSDs again are running away and OOMing > out. > > I noticed osd_memory_target_cgroup_limit_ratio": "0.800000" so tried > setting 'MemoryHigh' and 'MemoryMax' in the unit file. But the osd > process still happily runs right upto that line and lets the OS deal > with it (and it deals harshly). > > currently I have: > > "bluestore_cache_size": "0", > "bluestore_cache_size_hdd": "1073741824", > "bluestore_cache_size_ssd": "1073741824", > > and > MemoryHigh=2560M > MemoryMax=3072M > > and processes keep running right upto that 3G line and getting smacked > down which is causing performance issues as they thrash and I suspect > some scrub issues I've seen recently. > > I guess my next traw to grab at is to set "bluestore_cache_size" but > is there something I'm missing here? > > Thanks, > -Jon > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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