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  1. MariaDB ColumnStore
  2. MCOL-4692

Remove global mutex lock in OAMCache facility.

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Details

    • Task
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 5.5.2
    • 5.6.1
    • ExeMgr, PrimProc
    • None
    • 2021-7

    Description

      oam/oamcpp/oamcache.cpp has a global mutex that can slow down execution b/c of lock contention, namely boost::mutex cacheLock.
      The existing implementation of OAMCache can also re-read configuration file holding the lock from either disk or OS buffercache in certain conditions. I also remove this functionality to reduce the lock contention.

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          causes

          Bug - A problem which impairs or prevents the functions of the product. MCOL-4920 The plugin code doesn't fetch the updates from Columnstore.xml in case of a failover situation w/o restart

          • Blocker - Blocks development and/or testing work, production could not run.
          • Closed
          is part of

          Bug - A problem which impairs or prevents the functions of the product. MCOL-4593 Multiple concurrent queries with aggregates are bottlenecked, result in lack of user scalability

          • Trivial - Cosmetic problem like misspelt words or misaligned text.
          • Stalled

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              drrtuy Roman
              drrtuy Roman
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              Dates

                Created:
                Updated:
                Resolved:

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