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  1. Core Server
  2. SERVER-23069

Improve tcmalloc freelist statistics

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    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: 3.3.2
    • Fix Version/s: 3.2.9, 3.3.4
    • Component/s: Diagnostics
    • Labels:

      Description

      TCMalloc doesn't give detailed statistics on the state of the freelist, which makes it difficult to analyze severe memory fragmentations like those in SERVER-22906 or SERVER-20306.

      Improve the TCMalloc serverStatus() output by traversing the freelists for the different size classes, giving us more information. Add a new function in TCMalloc that exposes these statistics efficiently, allowing us to create a BSON object out of them rather than returning a text blob that cannot be parsed.

      See also: https://github.com/gperftools/gperftools/issues/727

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          is related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-22906 MongoD uses excessive memory over and above the WiredTiger cache size

          • Critical - P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. SERVER-20306 75% excess memory usage under WiredTiger during stress test

          • Major - P3 - Major loss of function.
          • Closed
          related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-23594 Add option to specify TCMalloc statistics verbosity in FTDC

          • Major - P3 - Major loss of function.
          • Closed
          links to

          Web Link Related gperftools issue

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              Assignee:
              kyle.suarez Kyle Suarez
              Reporter:
              kyle.suarez Kyle Suarez
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