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Type:
Bug
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Resolution: Duplicate
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Priority:
Major - P3
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None
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Affects Version/s: 4.4.0-rc4
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Component/s: None
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None
This isn't new in rc4, it has been a problem in previous earlier release candidates, but rc4 is more stable then previous release candidates so it is easier to observe.
The workload is Linkbench with the same configuration that gets WT-6175. The test database fits in memory (maxid=10000001 in test_control.yml). The test sequence is load, create index, run many 1 hour transaction tests. The size of the mongod process (VSZ and RSS) grows with each transaction test and after ~10 hours the mongod process runs out of memory. In this case the test server has 60G of RAM.
The test, Linkbench2, is in DSI although that config has to be modified:
1) set cacheSizeGB=40
2) I don't think it matters but database files were not compressed
3) run the transaction test for about 20 1-hour loops
Here is an example of the size of mongod at the end of the first 19 1-hour loops. OOM happens on loop 20. cacheSizeGB=40 and the test server has ~60G of RAM
ec2-user 64941 492 68.4 44794496 42301696 ? SLl 15:49 637:09 bin/mongod --config mongo.conf ec2-user 64941 504 72.3 47211428 44722968 ? SLl 15:49 956:21 bin/mongod --config mongo.conf ec2-user 64941 511 75.6 49300640 46792636 ? SLl 15:49 1275:28 bin/mongod --config mongo.conf ec2-user 64941 515 79.3 51611064 49040132 ? SLl 15:49 1594:18 bin/mongod --config mongo.conf ec2-user 64941 518 82.3 53831364 50924904 ? SLl 15:49 1918:05 bin/mongod --config mongo.conf ec2-user 64941 522 85.7 55879612 53017960 ? SLl 15:49 2244:04 bin/mongod --config mongo.conf ec2-user 64941 525 87.7 57198684 54228240 ? SLl 15:49 2572:36 bin/mongod --config mongo.conf ec2-user 64941 528 89.3 58190036 55252252 ? SLl May11 2908:16 bin/mongod --config mongo.conf ec2-user 64941 533 93.2 60639740 57651416 ? SLl May11 3254:13 bin/mongod --config mongo.conf ec2-user 64941 537 93.7 61327952 57973468 ? SLl May11 3601:41 bin/mongod --config mongo.conf ec2-user 64941 540 93.4 61360724 57785736 ? SLl May11 3948:40 bin/mongod --config mongo.conf ec2-user 64941 544 94.1 61696636 58195144 ? SLl May11 4300:56 bin/mongod --config mongo.conf ec2-user 64941 549 95.0 62163636 58774912 ? SLl May11 4671:21 bin/mongod --config mongo.conf ec2-user 64941 553 95.9 62884620 59333032 ? SLl May11 5038:35 bin/mongod --config mongo.conf ec2-user 64941 557 95.6 62982936 59107644 ? SLl May11 5407:46 bin/mongod --config mongo.conf ec2-user 64941 560 95.5 62982936 59079712 ? SLl May11 5771:55 bin/mongod --config mongo.conf ec2-user 64941 563 95.2 63015708 58901768 ? SLl May11 6140:23 bin/mongod --config mongo.conf ec2-user 64941 565 95.0 63015708 58774420 ? SLl May11 6510:13 bin/mongod --config mongo.conf ec2-user 64941 568 95.1 63015708 58797536 ? SLl May11 6878:00 bin/mongod --config mongo.conf
- duplicates
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- Closed
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