Dear Stefan, I check with top the total allocation. ps -aux gives: USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND ceph 784155 15.8 3.1 6014276 4215008 ? Sl Jan31 932:13 /usr/bin/ceph-osd --cluster ceph -f -i 243 ... ceph 784732 16.6 3.0 6058736 4082504 ? Sl Jan31 976:59 /usr/bin/ceph-osd --cluster ceph -f -i 247 ... ceph 785812 17.1 3.0 5989576 3959996 ? Sl Jan31 1008:46 /usr/bin/ceph-osd --cluster ceph -f -i 254 ... ceph 786352 14.9 3.1 5955520 4132840 ? Sl Jan31 874:37 /usr/bin/ceph-osd --cluster ceph -f -i 256 ... These should have 8GB resident by now, but stay at or just below 4G. The other options are set as [root@ceph-04 ~]# ceph config get osd.243 bluefs_allocator bitmap [root@ceph-04 ~]# ceph config get osd.243 bluestore_allocator bitmap [root@ceph-04 ~]# ceph config get osd.243 osd_memory_target 8589934592 Best regards, ================= Frank Schilder AIT Risø Campus Bygning 109, rum S14 ________________________________________ From: Stefan Kooman <stefan@xxxxxx> Sent: 04 February 2020 16:34:34 To: Frank Schilder Cc: ceph-users Subject: Re: osd_memory_target ignored Hi, Quoting Frank Schilder (frans@xxxxxx): > I recently upgraded from 13.2.2 to 13.2.8 and observe two changes that > I struggle with: > > - from release notes: The bluestore_cache_* options are no longer > needed. They are replaced by osd_memory_target, defaulting to 4GB. - > the default for bluestore_allocator has changed from stupid to bitmap, > > which seem to conflict each other, or at least I seem unable to > achieve what I want. > > I have a number of OSDs for which I would like to increase the cache > size. In the past I used bluestore_cache_size=8G and it worked like a > charm. I now changed that to osd_memory_target=8G without any effect. > The usage stays at 4G and the virtual size is about 5G. I would expect > both to be close to 8G. The read cache for these OSDs usually fills up > within a few hours. The cluster is now running a few days with the new > configs to no avail. How do you check the memory usage? We have a osd_memory_target=11G and the OSDs consume this exact amount of RAM (ps aux |grep osd). We are running 13.2.8. ceph daemon osd.$id dump_mempools would give ~ 4 GiB of RAM. So there is more RAM usage than only specified by "mempool" obviously. > > The documentation of osd_memory_target refers to tcmalloc a lot. Is > this in conflict with allocator=bitmap? If so, what is the way to tune > cache sizes (say if tcmalloc is not used/how to check?)? Are > bluestore_cache_* indeed obsolete as the above release notes suggest, > or is this not true? AFAIK these are not related. We use "bluefs_allocator": "bitmap" and "bluestore_allocator": "bitmap". Gr. Stefan -- | BIT BV https://www.bit.nl/ Kamer van Koophandel 09090351 | GPG: 0xD14839C6 +31 318 648 688 / info@xxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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