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  1. MariaDB Server
  2. MDEV-16251

Query caching should not be enabled by default in apt packages

Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 5.5(EOL), 10.0(EOL), 10.1(EOL), 10.2(EOL), 10.3(EOL)
    • 10.5.4
    • Platform Debian

    Description

      Query caching is enabled in MariaDB apt packages although it’s not the default behaviour of a vanilla MariaDB server (see the documentation of query_cache_type).
      This probably happens because query_cache_size is set to a non-default value.

      It is especially problematic since query caching has a regression in MariaDB 10.2.x and 10.3.x which causes SELECT to return wrong results in certain scenarios (see MDEV-16087 for details).

      Attachments

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-16087 Inconsistent SELECT results when query cache is enabled

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

          Bug - A problem which impairs or prevents the functions of the product. MDEV-22795 Query cache still activated in Ubutu pacakges

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

          Activity

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            otto Otto Kekäläinen added a comment -

            With MDEV-16087 fixed, should query cache be now enabled by default or not?

            I see that in upstream Debian packaging the my.cnf ships with query_cache_size=64M and in downstream official Debian packages there is query_cache_size=16M

            otto Otto Kekäläinen added a comment - With MDEV-16087 fixed, should query cache be now enabled by default or not? I see that in upstream Debian packaging the my.cnf ships with query_cache_size=64M and in downstream official Debian packages there is query_cache_size=16M
            bwaldvogel Benedikt Waldvogel added a comment -

            With MDEV-16087 fixed, should query cache be now enabled by default or not?

            In my opinion the apt packages should use the default configuration.
            I.e. default query_cache_size and thus query caching disabled.

            bwaldvogel Benedikt Waldvogel added a comment - With MDEV-16087 fixed, should query cache be now enabled by default or not? In my opinion the apt packages should use the default configuration. I.e. default query_cache_size and thus query caching disabled.
            otto Otto Kekäläinen added a comment -

            WIP in https://github.com/MariaDB/server/pull/1504

            otto Otto Kekäläinen added a comment - WIP in https://github.com/MariaDB/server/pull/1504
            otto Otto Kekäläinen added a comment -

            Closed via aaaf005ce61a543f1a1470b179ccb535698b36ef and bb8477778b72f047437b2a03a2bd38997e155f10 when #1504 was merged.

            otto Otto Kekäläinen added a comment - Closed via aaaf005ce61a543f1a1470b179ccb535698b36ef and bb8477778b72f047437b2a03a2bd38997e155f10 when #1504 was merged.

            People

              otto Otto Kekäläinen
              bwaldvogel Benedikt Waldvogel
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              Dates

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                Updated:
                Resolved:

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