Yeah, is also my thread. This thread was created before lower the cache size from 512Mb to 8Mb. I thought that maybe was my fault and I did a misconfiguration, so I've ignored the problem until now.
Greetings! El mar., 24 jul. 2018 1:00, Gregory Farnum <gfar...@redhat.com> escribió: > On Mon, Jul 23, 2018 at 11:08 AM Patrick Donnelly <pdonn...@redhat.com> > wrote: > >> On Mon, Jul 23, 2018 at 5:48 AM, Daniel Carrasco <d.carra...@i2tic.com> >> wrote: >> > Hi, thanks for your response. >> > >> > Clients are about 6, and 4 of them are the most of time on standby. >> Only two >> > are active servers that are serving the webpage. Also we've a varnish on >> > front, so are not getting all the load (below 30% in PHP is not much). >> > About the MDS cache, now I've the mds_cache_memory_limit at 8Mb. >> >> What! Please post `ceph daemon mds.<name> config diff`, `... perf >> dump`, and `... dump_mempools ` from the server the active MDS is on. >> >> > I've tested >> > also 512Mb, but the CPU usage is the same and the MDS RAM usage grows >> up to >> > 15GB (on a 16Gb server it starts to swap and all fails). With 8Mb, at >> least >> > the memory usage is stable on less than 6Gb (now is using about 1GB of >> RAM). >> >> We've seen reports of possible memory leaks before and the potential >> fixes for those were in 12.2.6. How fast does your MDS reach 15GB? >> Your MDS cache size should be configured to 1-8GB (depending on your >> preference) so it's disturbing to see you set it so low. >> > > See also the thread "[ceph-users] Fwd: MDS memory usage is very high", > which had more discussion of that. The MDS daemon seemingly had 9.5GB of > allocated RSS but only believed 489MB was in use for the cache... > -Greg > > >> >> -- >> Patrick Donnelly >> _______________________________________________ >> ceph-users mailing list >> ceph-users@lists.ceph.com >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> >
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