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  1. Core Server
  2. SERVER-11021

cache dbhash results in mongod for config. collections

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    • Type: Icon: Improvement Improvement
    • Resolution: Done
    • Priority: Icon: Major - P3 Major - P3
    • 2.4.7, 2.5.3
    • Affects Version/s: None
    • Component/s: Sharding
    • None

      Issue Status as of November 26th, 2013

      ISSUE SUMMARY
      Cache results of dbhash command for config collections.

      USER IMPACT
      When multiple mongos instances issue the dbhash command simultaneously, config database can be overloaded and affect performance.
      It is present in versions of MongoDB prior to and including v2.4.6.

      SOLUTION
      Cache dbhash commands on the server.

      WORKAROUNDS
      This is a performance improvement only.

      PATCHES
      Production release v2.4.7 contains the fix for this issue, and production release v2.6.0 will contain the fix as well.

      Original Description

      This will mitigate having lots of mongos doing hashes at the same time.

            Assignee:
            eliot Eliot Horowitz (Inactive)
            Reporter:
            eliot Eliot Horowitz (Inactive)
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              Created:
              Updated:
              Resolved: