> Op 16 februari 2017 om 7:19 schreef Muthusamy Muthiah <muthiah.muthusamy@xxxxxxxxx>: > > > Thanks IIya Letkowski for the information we will change this value > accordingly. > What I understand from yesterday's performance meeting is that this seems like a bug. Lowering this buffer reduces memory, but the root-cause seems to be memory not being freed. A few bytes of a larger allocation still allocated causing this buffer not to be freed. Tried: debug_mempools = true $ ceph daemon osd.X dump_mempools Might want to view the YouTube video of yesterday when it's online: https://www.youtube.com/channel/UCno-Fry25FJ7B4RycCxOtfw/videos Wido > Thanks, > Muthu > > On 15 February 2017 at 17:03, Ilya Letkowski <mj12.svetzari@xxxxxxxxx> > wrote: > > > Hi, Muthusamy Muthiah > > > > I'm not totally sure that this is a memory leak. > > We had same problems with bluestore on ceph v11.2.0. > > Reduce bluestore cache helped us to solve it and stabilize OSD memory > > consumption on the 3GB level. > > > > Perhaps this will help you: > > > > bluestore_cache_size = 104857600 > > > > > > > > On Tue, Feb 14, 2017 at 11:52 AM, Muthusamy Muthiah < > > muthiah.muthusamy@xxxxxxxxx> wrote: > > > >> Hi All, > >> > >> On all our 5 node cluster with ceph 11.2.0 we encounter memory leak > >> issues. > >> > >> Cluster details : 5 node with 24/68 disk per node , EC : 4+1 , RHEL 7.2 > >> > >> Some traces using sar are below and attached the memory utilisation graph > >> . > >> > >> (16:54:42)[cn2.c1 sa] # sar -r > >> 07:50:01 kbmemfree kbmemused %memused kbbuffers kbcached kbcommit %commit > >> kbactive kbinact kbdirty > >> 10:20:01 32077264 132754368 80.54 16176 3040244 77767024 47.18 51991692 > >> 2676468 260 > >> > >> > >> > >> > >> > >> > >> > >> > >> *10:30:01 32208384 132623248 80.46 16176 3048536 77832312 47.22 51851512 > >> 2684552 1210:40:01 32067244 132764388 80.55 16176 3059076 77832316 47.22 > >> 51983332 2694708 26410:50:01 30626144 134205488 81.42 16176 3064340 > >> 78177232 47.43 53414144 2693712 411:00:01 28927656 135903976 82.45 16176 > >> 3074064 78958568 47.90 55114284 2702892 1211:10:01 27158548 137673084 83.52 > >> 16176 3080600 80553936 48.87 56873664 2708904 1211:20:01 26455556 138376076 > >> 83.95 16176 3080436 81991036 49.74 57570280 2708500 811:30:01 26002252 > >> 138829380 84.22 16176 3090556 82223840 49.88 58015048 2718036 1611:40:01 > >> 25965924 138865708 84.25 16176 3089708 83734584 50.80 58049980 2716740 > >> 1211:50:01 26142888 138688744 84.14 16176 3089544 83800100 50.84 57869628 > >> 2715400 16* > >> > >> ... > >> ... > >> > >> In the attached graph, there is increase in memory utilisation by > >> ceph-osd during soak test. And when it reaches the system limit of 128GB > >> RAM , we could able to see the below dmesg logs related to memory out when > >> the system reaches close to 128GB RAM. OSD.3 killed due to Out of memory > >> and started again. > >> > >> [Tue Feb 14 03:51:02 2017] *tp_osd_tp invoked oom-killer: > >> gfp_mask=0x280da, order=0, oom_score_adj=0* > >> [Tue Feb 14 03:51:02 2017] tp_osd_tp cpuset=/ mems_allowed=0-1 > >> [Tue Feb 14 03:51:02 2017] CPU: 20 PID: 11864 Comm: tp_osd_tp Not tainted > >> 3.10.0-327.13.1.el7.x86_64 #1 > >> [Tue Feb 14 03:51:02 2017] Hardware name: HP ProLiant XL420 Gen9/ProLiant > >> XL420 Gen9, BIOS U19 09/12/2016 > >> [Tue Feb 14 03:51:02 2017] ffff8819ccd7a280 0000000030e84036 > >> ffff881fa58f7528 ffffffff816356f4 > >> [Tue Feb 14 03:51:02 2017] ffff881fa58f75b8 ffffffff8163068f > >> ffff881fa3478360 ffff881fa3478378 > >> [Tue Feb 14 03:51:02 2017] ffff881fa58f75e8 ffff8819ccd7a280 > >> 0000000000000001 000000000001f65f > >> [Tue Feb 14 03:51:02 2017] Call Trace: > >> [Tue Feb 14 03:51:02 2017] [<ffffffff816356f4>] dump_stack+0x19/0x1b > >> [Tue Feb 14 03:51:02 2017] [<ffffffff8163068f>] dump_header+0x8e/0x214 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff8116ce7e>] > >> oom_kill_process+0x24e/0x3b0 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff8116c9e6>] ? > >> find_lock_task_mm+0x56/0xc0 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff8116d6a6>] > >> *out_of_memory+0x4b6/0x4f0* > >> [Tue Feb 14 03:51:02 2017] [<ffffffff81173885>] > >> __alloc_pages_nodemask+0xa95/0xb90 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff811b792a>] > >> alloc_pages_vma+0x9a/0x140 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff811976c5>] > >> handle_mm_fault+0xb85/0xf50 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff811957fb>] ? > >> follow_page_mask+0xbb/0x5c0 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff81197c2b>] > >> __get_user_pages+0x19b/0x640 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff8119843d>] > >> get_user_pages_unlocked+0x15d/0x1f0 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff8106544f>] > >> get_user_pages_fast+0x9f/0x1a0 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff8121de78>] > >> do_blockdev_direct_IO+0x1a78/0x2610 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff81218c40>] ? I_BDEV+0x10/0x10 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff8121ea65>] > >> __blockdev_direct_IO+0x55/0x60 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff81218c40>] ? I_BDEV+0x10/0x10 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff81219297>] > >> blkdev_direct_IO+0x57/0x60 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff81218c40>] ? I_BDEV+0x10/0x10 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff8116af63>] > >> generic_file_aio_read+0x6d3/0x750 > >> [Tue Feb 14 03:51:02 2017] [<ffffffffa038ad5c>] ? > >> xfs_iunlock+0x11c/0x130 [xfs] > >> [Tue Feb 14 03:51:02 2017] [<ffffffff811690db>] ? unlock_page+0x2b/0x30 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff81192f21>] ? __do_fault+0x401/0x510 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff8121970c>] blkdev_aio_read+0x4c/0x70 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff811ddcfd>] do_sync_read+0x8d/0xd0 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff811de45c>] vfs_read+0x9c/0x170 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff811df182>] SyS_pread64+0x92/0xc0 > >> [Tue Feb 14 03:51:02 2017] [<ffffffff81645e89>] > >> system_call_fastpath+0x16/0x1b > >> > >> > >> Feb 14 03:51:40 fr-paris kernel: *Out of memory: Kill process 7657 > >> (ceph-osd) score 45 or sacrifice child* > >> Feb 14 03:51:40 fr-paris kernel: Killed process 7657 (ceph-osd) > >> total-vm:8650208kB, anon-rss:6124660kB, file-rss:1560kB > >> Feb 14 03:51:41 fr-paris systemd:* ceph-osd@3.service: main process > >> exited, code=killed, status=9/KILL* > >> Feb 14 03:51:41 fr-paris systemd: Unit ceph-osd@3.service entered failed > >> state. > >> Feb 14 03:51:41 fr-paris systemd: *ceph-osd@3.service failed.* > >> Feb 14 03:51:41 fr-paris systemd: cassandra.service: main process exited, > >> code=killed, status=9/KILL > >> Feb 14 03:51:41 fr-paris systemd: Unit cassandra.service entered failed > >> state. > >> Feb 14 03:51:41 fr-paris systemd: cassandra.service failed. > >> Feb 14 03:51:41 fr-paris ceph-mgr: 2017-02-14 03:51:41.978878 > >> 7f51a3154700 -1 mgr ms_dispatch osd_map(7517..7517 src has 6951..7517) v3 > >> Feb 14 03:51:42 fr-paris systemd: Device dev-disk-by\x2dpartlabel-ceph\x5cx20block.device > >> appeared twice with different sysfs paths /sys/devices/pci0000:00/0000:0 > >> 0:03.2/0000:03:00.0/host0/target0:0:0/0:0:0:9/block/sdj/sdj2 and > >> /sys/devices/pci0000:00/0000:00:03.2/0000:03:00.0/host0/targ > >> et0:0:0/0:0:0:4/block/sde/sde2 > >> Feb 14 03:51:42 fr-paris ceph-mgr: 2017-02-14 03:51:42.992477 > >> 7f51a3154700 -1 mgr ms_dispatch osd_map(7518..7518 src has 6951..7518) v3 > >> Feb 14 03:51:43 fr-paris ceph-mgr: 2017-02-14 03:51:43.508990 > >> 7f51a3154700 -1 mgr ms_dispatch mgrdigest v1 > >> Feb 14 03:51:48 fr-paris ceph-mgr: 2017-02-14 03:51:48.508970 > >> 7f51a3154700 -1 mgr ms_dispatch mgrdigest v1 > >> Feb 14 03:51:53 fr-paris ceph-mgr: 2017-02-14 03:51:53.509592 > >> 7f51a3154700 -1 mgr ms_dispatch mgrdigest v1 > >> Feb 14 03:51:58 fr-paris ceph-mgr: 2017-02-14 03:51:58.509936 > >> 7f51a3154700 -1 mgr ms_dispatch mgrdigest v1 > >> Feb 14 03:52:01 fr-paris systemd: ceph-osd@3.service holdoff time over, > >> scheduling restart. > >> Feb 14 03:52:02 fr-paris systemd: *Starting Ceph object storage daemon > >> osd.3.*.. > >> Feb 14 03:52:02 fr-paris systemd: Started Ceph object storage daemon > >> osd.3. > >> Feb 14 03:52:02 fr-paris numactl: 2017-02-14 03:52:02.307106 7f1e499bb940 > >> -1 WARNING: the following dangerous and experimental features are enabled: > >> bluestore,rocksdb > >> Feb 14 03:52:02 fr-paris numactl: 2017-02-14 03:52:02.317687 7f1e499bb940 > >> -1 WARNING: the following dangerous and experimental features are enabled: > >> bluestore,rocksdb > >> Feb 14 03:52:02 fr-paris numactl: starting osd.3 at - osd_data > >> /var/lib/ceph/osd/ceph-3 /var/lib/ceph/osd/ceph-3/journal > >> Feb 14 03:52:02 fr-paris numactl: 2017-02-14 03:52:02.333522 7f1e499bb940 > >> -1 WARNING: experimental feature 'bluestore' is enabled > >> Feb 14 03:52:02 fr-paris numactl: Please be aware that this feature is > >> experimental, untested, > >> Feb 14 03:52:02 fr-paris numactl: unsupported, and may result in data > >> corruption, data loss, > >> Feb 14 03:52:02 fr-paris numactl: and/or irreparable damage to your > >> cluster. Do not use > >> Feb 14 03:52:02 fr-paris numactl: feature with important data. > >> > >> This seems to happen only in 11.2.0 and not in 11.1.x . Could you please > >> help us in resolving this issue by means of any config change to limit the > >> memory use on ceph-osd or a bug in the current kraken release. > >> > >> Thanks, > >> Muthu > >> > >> _______________________________________________ > >> ceph-users mailing list > >> ceph-users@xxxxxxxxxxxxxx > >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >> > >> > > > > > > -- > > С уважением / Best regards > > > > Илья Летковский / Ilya Letkouski > > > > Phone, Viber: +375 29 3237335 > > > > Minsk, Belarus (GMT+3) > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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