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Type:
Bug
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Resolution: Duplicate
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Priority:
Critical - P2
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None
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Affects Version/s: 3.2.11
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Component/s: mongodump
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Platforms 2016-11-21, Platforms 2017-01-23
A mongodump with compression to an output directory (not archive) rapidly consumes all available RAM and is terminated by OOMkiller. Eg. with 8GB data size, mongodump reached ±24GB RSS before being terminated. A few times, there was a stacktrace, which I've attached. Mostly, it's OOMkiller.
Note:
- Without the gzip option, the dump completes successfully.
- `mongodump --gzip --archive=/var/backups/mongodb/test/` completes successfully.
[ 2603.248664] Out of memory: Kill process 7306 (mongodump) score 730 or sacrifice child [ 2603.248790] Killed process 7306 (mongodump) total-vm:29607944kB, anon-rss:24987428kB, file-rss:0kB
# with: time -v mongodump --gzip --out ~/
Command terminated by signal 9
User time (seconds): 304.06
System time (seconds): 151.85
Percent of CPU this job got: 284%
Elapsed (wall clock) time (h:mm:ss or m:ss): 2:40.31
Average shared text size (kbytes): 0
Average unshared data size (kbytes): 0
Average stack size (kbytes): 0
Average total size (kbytes): 0
Maximum resident set size (kbytes): 24988952
Average resident set size (kbytes): 0
Major (requiring I/O) page faults: 290
Minor (reclaiming a frame) page faults: 6321750
Voluntary context switches: 1067807
Involuntary context switches: 135809
Swaps: 0
File system inputs: 54280
File system outputs: 653864
Socket messages sent: 0
Socket messages received: 0
Signals delivered: 0
Page size (bytes): 4096
Exit status: 0
The exact command line arguments being supplied:
mongodump --ssl --sslAllowInvalidCertificates --host hidden-secondary.example.com --port 27017 --username backup --password REDACTED --authenticationDatabase admin --out /var/backups/mongodb/test/ --gzip
- duplicates
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TOOLS-1488 provide IO buffers to oplog archive intents
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- Closed
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