Hello,
We are trying out Ceph on a small cluster and are observing memory
leakage in the OSD processes. The leak seems to be in addition to the known
leak related to the "buffer_anon" pool and is high enough for the processes
to run against their memory limits in a few hours.
The following table gives a snapshot of increase in memory being used by
one of the OSD processes over an hour (t+63 indicates 63 minutes after the
first snapshot). Full mempool dumps and output of top are at the bottom.
Over an hour the OSDs went from RSS in the range 469-704MB to 735-844MB.
The container are restricted to 1GB of memory which causes them to restart
after a few hours.
t+00 t+11 t+63
683980 706980 786324 VmRSS KB
5803 10457 32308 buffer_anon KB(dump_mempools)
437369 444945 458688 total KB(dump_mempools)
Our setup is as follows:
* 3 nodes each with 30 OSDs for a total of 90 OSDs.
* Running Luminous (12.2.1) official docker images on top of CoreOS
* The OSDs use Bluestore with all the db.* partitions on the same drive
* The nodes have 32GB of RAM and 8 cores. The test cluster nodes do have
less than the recommended amount of RAM per OSD to constrain them and find
problems
* The cluster currently has 501 PGs/OSD (Again higher than recommended for
testing)
* The pools are setup for RGW usage with replication_factor of 3 on all the
pools (2752 PGs) except default.rgw.buckets.data (4096 PGs) which is setup
with 6+3 erasure coding.
* The clients use the python rados library to push 128MB files directly
into the default.rgw.buckets.data pool. There are 3 clients running in
parallel on VMs and are pushing about 350-400MB/s in aggregate.
The conf file with non-default settings looks like
[global]
mon_max_pg_per_osd = 750
mon_osd_down_out_interval = 900
mon_pg_warn_max_per_osd = 600
osd_crush_chooseleaf_type = 0
osd_map_message_max = 10
osd_max_pg_per_osd_hard_ratio = 1.2
[mon]
mon_max_pgmap_epochs = 100
mon_min_osdmap_epochs = 100
[osd]
bluestore_cache_kv_ratio = .95
bluestore_cache_kv_max = 67108864
bluestore_cache_meta_ratio = .05
bluestore_cache_size = 268435456
osd_map_cache_size = 50
osd_map_max_advance = 25
osd_map_share_max_epochs = 25
osd_max_object_size = 1073741824
osd_max_write_size = 256
osd_pg_epoch_persisted_max_stale = 25
osd_pool_erasure_code_stripe_unit = 4194304
top - 20:46:18 up 1 day, 2:21, 2 users, load average: 3.13, 1.78, 1.25
Tasks: 567 total, 1 running, 566 sleeping, 0 stopped, 0 zombie
%Cpu(s): 6.7 us, 5.9 sy, 0.0 ni, 73.5 id, 11.1 wa, 0.3 hi, 2.5 si,
0.0 st
KiB Mem: 32981660 total, 24427392 used, 8554268 free, 351396 buffers
KiB Swap: 0 total, 0 used, 0 free. 2803348 cached Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
COMMAND
376901 64045 20 0 1522220 704896 29056 S 14.4 2.1 1:26.72
ceph-osd
370611 64045 20 0 1527432 698080 29476 S 2.0 2.1 1:29.03
ceph-osd
396886 64045 20 0 1486584 696480 29060 S 2.0 2.1 1:22.93
ceph-osd
382254 64045 20 0 1516968 690196 28984 S 3.0 2.1 1:27.15
ceph-osd
359523 64045 20 0 1516888 686728 29332 S 3.5 2.1 1:28.67
ceph-osd
366478 64045 20 0 1560912 683980 29076 S 1.5 2.1 1:28.59
ceph-osd
382255 64045 20 0 1493116 669616 29276 S 1.5 2.0 1:29.46
ceph-osd
360152 64045 20 0 1529896 666628 29268 S 0.5 2.0 1:27.96
ceph-osd
372155 64045 20 0 1523640 662492 29416 S 17.4 2.0 1:29.79
ceph-osd
358800 64045 20 0 1513640 662224 29184 S 13.9 2.0 1:29.80
ceph-osd
360142 64045 20 0 1517992 661868 29328 S 0.5 2.0 1:31.69
ceph-osd
398310 64045 20 0 1504552 658216 28796 S 1.0 2.0 1:20.62
ceph-osd
368705 64045 20 0 1505544 657776 29292 S 1.0 2.0 1:27.32
ceph-osd
386044 64045 20 0 1501488 655960 29536 S 3.0 2.0 1:24.87
ceph-osd
386940 64045 20 0 1503056 652552 29152 S 4.5 2.0 1:28.22
ceph-osd
386050 64045 20 0 1489996 650628 28800 S 1.0 2.0 1:28.46
ceph-osd
402086 64045 20 0 1504528 646672 29344 S 2.5 2.0 1:26.96
ceph-osd
400590 64045 20 0 1487424 642288 29348 S 3.5 1.9 1:21.55
ceph-osd
387860 64045 20 0 1504520 641296 29316 S 4.0 1.9 1:19.98
ceph-osd
392900 64045 20 0 1493492 637572 29156 S 1.5 1.9 1:26.86
ceph-osd
375314 64045 20 0 1520448 629272 29412 S 1.0 1.9 1:32.04
ceph-osd
372038 64045 20 0 1497992 627176 29300 S 1.0 1.9 1:30.36
ceph-osd
385149 64045 20 0 1514284 624428 28960 S 0.5 1.9 1:28.56
ceph-osd
382236 64045 20 0 1512248 616256 29568 S 2.0 1.9 1:24.03
ceph-osd
374703 64045 20 0 1511740 571404 29628 S 2.5 1.7 1:27.88
ceph-osd
367873 64045 20 0 1394740 564488 29012 S 2.5 1.7 1:31.64
ceph-osd
360104 64045 20 0 1373880 532880 29132 S 2.5 1.6 1:32.11
ceph-osd
376002 64045 20 0 1391576 516256 29132 S 0.5 1.6 1:27.21
ceph-osd
402624 64045 20 0 1353104 515964 28876 S 3.0 1.6 1:23.38
ceph-osd
405130 64045 20 0 1367740 469660 29216 S 2.5 1.4 1:22.75
ceph-osd
687 root 20 0 345656 237144 236272 S 0.0 0.7 1:00.56
systemd-+
3179 root 20 0 4072976 85084 25448 S 0.0 0.3 1:04.11
dockerd
data1 core # cat /proc/366478/status | grep -i rss
VmRSS: 683980 kB
RssAnon: 654904 kB
RssFile: 29076 kB
RssShmem: 0 kB
root@data1:/var/run/ceph# ceph daemon osd.1 dump_mempools
{
"bloom_filter": {
"items": 0,
"bytes": 0
},
"bluestore_alloc": {
"items": 6000,
"bytes": 6000
},
"bluestore_cache_data": {
"items": 26,
"bytes": 745472
},
"bluestore_cache_onode": {
"items": 1419,
"bytes": 964920
},
"bluestore_cache_other": {
"items": 87945,
"bytes": 1620755
},
"bluestore_fsck": {
"items": 0,
"bytes": 0
},
"bluestore_txc": {
"items": 2,
"bytes": 1440
},
"bluestore_writing_deferred": {
"items": 27,
"bytes": 427916158
},
"bluestore_writing": {
"items": 9,
"bytes": 1168088
},
"bluefs": {
"items": 84,
"bytes": 5088
},
"buffer_anon": {
"items": 5640,
"bytes": 5942318
},
"buffer_meta": {
"items": 114,
"bytes": 10032
},
"osd": {
"items": 502,
"bytes": 6056128
},
"osd_mapbl": {
"items": 0,
"bytes": 0
},
"osd_pglog": {
"items": 9366,
"bytes": 2374198
},
"osdmap": {
"items": 28585,
"bytes": 1055944
},
"osdmap_mapping": {
"items": 0,
"bytes": 0
},
"pgmap": {
"items": 0,
"bytes": 0
},
"mds_co": {
"items": 0,
"bytes": 0
},
"unittest_1": {
"items": 0,
"bytes": 0
},
"unittest_2": {
"items": 0,
"bytes": 0
},
"total": {
"items": 139719,
"bytes": 447866541
}
}
top - 20:57:34 up 1 day, 2:32, 2 users, load average: 4.60, 4.05, 2.82
Tasks: 566 total, 1 running, 565 sleeping, 0 stopped, 0 zombie
%Cpu(s): 7.5 us, 6.0 sy, 0.0 ni, 71.0 id, 12.7 wa, 0.3 hi, 2.4 si,
0.0 st
KiB Mem: 32981660 total, 25681656 used, 7300004 free, 351396 buffers
KiB Swap: 0 total, 0 used, 0 free. 2808268 cached Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
COMMAND
360142 64045 20 0 1592744 713812 29328 S 2.5 2.2 1:49.47
ceph-osd
366478 64045 20 0 1560912 706980 29076 S 0.5 2.1 1:47.25
ceph-osd
367873 64045 20 0 1581460 706308 29012 S 1.5 2.1 1:49.44
ceph-osd
392900 64045 20 0 1534452 703872 29156 S 1.5 2.1 1:45.23
ceph-osd
374703 64045 20 0 1558524 701372 29628 S 2.0 2.1 1:46.90
ceph-osd
372038 64045 20 0 1547496 699644 29300 S 1.5 2.1 1:50.03
ceph-osd
402086 64045 20 0 1544464 698036 29344 S 2.0 2.1 1:47.67
ceph-osd
359523 64045 20 0 1594744 696468 29332 S 3.5 2.1 1:47.64
ceph-osd
358800 64045 20 0 1553928 695140 29184 S 2.0 2.1 1:50.51
ceph-osd
370611 64045 20 0 1574888 691988 29476 S 2.0 2.1 1:49.00
ceph-osd
386940 64045 20 0 1544368 691512 29152 S 3.0 2.1 1:49.43
ceph-osd
376901 64045 20 0 1545100 691120 29056 S 2.0 2.1 1:45.11
ceph-osd
376002 64045 20 0 1522648 684568 29132 S 2.0 2.1 1:41.75
ceph-osd
368705 64045 20 0 1549256 682788 29292 S 12.4 2.1 1:45.15
ceph-osd
396886 64045 20 0 1574680 682776 29060 S 3.0 2.1 1:43.59
ceph-osd
360152 64045 20 0 1590664 681848 29268 S 19.9 2.1 1:47.58
ceph-osd
382254 64045 20 0 1558280 677496 29048 S 4.5 2.1 1:47.19
ceph-osd
360104 64045 20 0 1534648 676172 29132 S 3.0 2.1 1:49.43
ceph-osd
375314 64045 20 0 1561408 675596 29412 S 0.5 2.0 1:48.98
ceph-osd
382255 64045 20 0 1537852 672216 29276 S 17.4 2.0 1:51.59
ceph-osd
385149 64045 20 0 1519404 671404 28960 S 1.5 2.0 1:46.92
ceph-osd
372155 64045 20 0 1541048 665004 29416 S 3.0 2.0 1:50.02
ceph-osd
387860 64045 20 0 1526376 664912 29316 S 2.5 2.0 1:34.52
ceph-osd
386044 64045 20 0 1532560 659852 29536 S 2.0 2.0 1:42.56
ceph-osd
405130 64045 20 0 1498812 659236 29216 S 1.5 2.0 1:40.39
ceph-osd
402624 64045 20 0 1551440 658544 28876 S 3.5 2.0 1:43.41
ceph-osd
400590 64045 20 0 1529760 657700 29348 S 1.5 2.0 1:38.43
ceph-osd
382236 64045 20 0 1534104 653224 29568 S 2.0 2.0 1:40.17
ceph-osd
398310 64045 20 0 1516840 642552 28796 S 1.0 1.9 1:41.02
ceph-osd
386050 64045 20 0 1539852 641968 28800 S 1.0 1.9 1:48.66
ceph-osd
687 root 20 0 366148 245996 245124 S 0.0 0.7 1:01.04
systemd-+
3179 root 20 0 4072976 84748 25448 S 0.0 0.3 1:04.30
dockerd
data1 core # cat /proc/366478/status | grep -i rss
VmRSS: 706980 kB
RssAnon: 677904 kB
RssFile: 29076 kB
RssShmem: 0 kB
root@data1:/var/run/ceph# ceph daemon osd.1 dump_mempools
{
"bloom_filter": {
"items": 0,
"bytes": 0
},
"bluestore_alloc": {
"items": 6000,
"bytes": 6000
},
"bluestore_cache_data": {
"items": 26,
"bytes": 745472
},
"bluestore_cache_onode": {
"items": 1625,
"bytes": 1105000
},
"bluestore_cache_other": {
"items": 147702,
"bytes": 4368313
},
"bluestore_fsck": {
"items": 0,
"bytes": 0
},
"bluestore_txc": {
"items": 2,
"bytes": 1440
},
"bluestore_writing_deferred": {
"items": 27,
"bytes": 427916158
},
"bluestore_writing": {
"items": 9,
"bytes": 1168088
},
"bluefs": {
"items": 86,
"bytes": 5120
},
"buffer_anon": {
"items": 15580,
"bytes": 10707976
},
"buffer_meta": {
"items": 114,
"bytes": 10032
},
"osd": {
"items": 502,
"bytes": 6056128
},
"osd_mapbl": {
"items": 0,
"bytes": 0
},
"osd_pglog": {
"items": 9596,
"bytes": 2478294
},
"osdmap": {
"items": 28585,
"bytes": 1055944
},
"osdmap_mapping": {
"items": 0,
"bytes": 0
},
"pgmap": {
"items": 0,
"bytes": 0
},
"mds_co": {
"items": 0,
"bytes": 0
},
"unittest_1": {
"items": 0,
"bytes": 0
},
"unittest_2": {
"items": 0,
"bytes": 0
},
"total": {
"items": 209854,
"bytes": 455623965
}
}
top - 21:49:27 up 1 day, 3:24, 2 users, load average: 8.10, 5.14, 3.87
Tasks: 564 total, 1 running, 563 sleeping, 0 stopped, 0 zombie
%Cpu(s): 4.9 us, 4.7 sy, 0.0 ni, 76.7 id, 11.5 wa, 0.2 hi, 1.9 si,
0.0 st
KiB Mem: 32981660 total, 28791752 used, 4189908 free, 351396 buffers
KiB Swap: 0 total, 0 used, 0 free. 2819272 cached Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
COMMAND
359523 64045 20 0 1668152 844336 29332 S 0.5 2.6 3:16.18
ceph-osd
358800 64045 20 0 1656328 802864 29184 S 4.0 2.4 3:21.13
ceph-osd
370611 64045 20 0 1656488 799380 29476 S 3.5 2.4 3:22.27
ceph-osd
385149 64045 20 0 1661772 798792 28960 S 2.0 2.4 3:19.39
ceph-osd
376002 64045 20 0 1645208 798224 29132 S 2.0 2.4 3:00.87
ceph-osd
382255 64045 20 0 1717756 797044 29276 S 2.5 2.4 3:16.91
ceph-osd
374703 64045 20 0 1678364 795308 29628 S 1.5 2.4 3:15.13
ceph-osd
372038 64045 20 0 1701800 794968 29300 S 2.5 2.4 3:21.30
ceph-osd
398310 64045 20 0 1682088 794832 28796 S 2.5 2.4 3:23.65
ceph-osd
360152 64045 20 0 1664072 794580 29268 S 4.0 2.4 3:25.78
ceph-osd
386940 64045 20 0 1663152 789976 29152 S 1.5 2.4 3:26.28
ceph-osd
367873 64045 20 0 1738484 789456 29012 S 1.5 2.4 3:27.69
ceph-osd
368705 64045 20 0 1749288 788352 29292 S 2.0 2.4 3:08.00
ceph-osd
402086 64045 20 0 1681040 787748 29344 S 1.5 2.4 3:25.16
ceph-osd
382236 64045 20 0 1663512 787612 29568 S 2.0 2.4 3:03.32
ceph-osd
376901 64045 20 0 1770412 785916 29056 S 4.0 2.4 3:09.34
ceph-osd
375314 64045 20 0 1658016 785684 29412 S 2.5 2.4 3:25.24
ceph-osd
387860 64045 20 0 1649640 783232 29316 S 1.5 2.4 2:54.61
ceph-osd
396886 64045 20 0 1691768 775268 29060 S 1.0 2.4 3:21.43
ceph-osd
386050 64045 20 0 1669260 769440 28800 S 2.0 2.3 3:15.79
ceph-osd
360142 64045 20 0 1680168 768060 29328 S 3.5 2.3 3:13.78
ceph-osd
405130 64045 20 0 1651740 766800 29216 S 1.0 2.3 3:09.41
ceph-osd
366478 64045 20 0 1653072 764060 29076 S 1.5 2.3 3:14.65
ceph-osd
360104 64045 20 0 1668152 764008 29132 S 0.5 2.3 3:23.04
ceph-osd
372155 64045 20 0 1653016 761484 29416 S 1.0 2.3 3:19.32
ceph-osd
382254 64045 20 0 1753192 755592 29048 S 1.0 2.3 3:19.92
ceph-osd
392900 64045 20 0 1636212 755508 29156 S 1.0 2.3 3:08.03
ceph-osd
386044 64045 20 0 1671856 753824 29536 S 1.5 2.3 3:13.25
ceph-osd
400590 64045 20 0 1641056 741944 29348 S 2.0 2.2 2:59.38
ceph-osd
402624 64045 20 0 1686992 735960 28876 S 16.9 2.2 3:17.28
ceph-osd
687 root 20 0 382532 266000 265128 S 0.0 0.8 1:03.15
systemd-+
3179 root 20 0 4072976 84748 25448 S 0.0 0.3 1:05.07
dockerd
data1 core # cat /proc/366478/status | grep -i rss
VmRSS: 786324 kB
RssAnon: 757248 kB
RssFile: 29076 kB
RssShmem: 0 kB
root@data1:/var/run/ceph# ceph daemon osd.1 dump_mempools
{
"bloom_filter": {
"items": 0,
"bytes": 0
},
"bluestore_alloc": {
"items": 6000,
"bytes": 6000
},
"bluestore_cache_data": {
"items": 26,
"bytes": 745472
},
"bluestore_cache_onode": {
"items": 2595,
"bytes": 1764600
},
"bluestore_cache_other": {
"items": 428389,
"bytes": 17291843
},
"bluestore_fsck": {
"items": 0,
"bytes": 0
},
"bluestore_txc": {
"items": 0,
"bytes": 0
},
"bluestore_writing_deferred": {
"items": 26,
"bytes": 405541839
},
"bluestore_writing": {
"items": 9,
"bytes": 1168088
},
"bluefs": {
"items": 94,
"bytes": 5248
},
"buffer_anon": {
"items": 62355,
"bytes": 33084140
},
"buffer_meta": {
"items": 113,
"bytes": 9944
},
"osd": {
"items": 502,
"bytes": 6056128
},
"osd_mapbl": {
"items": 0,
"bytes": 0
},
"osd_pglog": {
"items": 10669,
"bytes": 2967654
},
"osdmap": {
"items": 28585,
"bytes": 1055944
},
"osdmap_mapping": {
"items": 0,
"bytes": 0
},
"pgmap": {
"items": 0,
"bytes": 0
},
"mds_co": {
"items": 0,
"bytes": 0
},
"unittest_1": {
"items": 0,
"bytes": 0
},
"unittest_2": {
"items": 0,
"bytes": 0
},
"total": {
"items": 539363,
"bytes": 469696900
}
}
Thanks
Subhachandra
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