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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Works as Designed
    • Affects Version/s: 2.0.0
    • Fix Version/s: None
    • Component/s: Sharding
    • Labels:
    • Environment:
      Debian Squeeze, mongo installed from official 10gen repo
    • Operating System:
      Linux

      Description

      We have two mongodb shards 29GB each. All data is about 50GB.
      When we restarted our servers appeared the following behaviour:
      res memory on each shard grows very slow (about 1MB/sec), but userd memory (by "free" linux command) grows very fast.
      Now we looks at this situation:

      mongostat:
      insert query update delete getmore command flushes mapped vsize res faults locked % idx miss % qr|qw ar|aw netIn netOut conn time
      15 109 9 2 57 87 0 33.9g 72.2g 1.49g 0 3.1 0 0|0 0|0 39k 329k 81 00:33:51

      but:

      root@MongoShard1:~# free
      total used free shared buffers cached
      Mem: 29367112 29226476 140636 0 40732 28061776
      -/+ buffers/cache: 1123968 28243144
      Swap: 1048568 0 1048568

      about 29gb used, but by mongo only 1.49gb
      there are no any other processes on server that can use more than some megabytes of ram

      Does it mongodb bug?

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              • Created:
                Updated:
                Resolved: