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  1. MariaDB Server
  2. MDEV-15253

Default optimizer setting changes for MariaDB 10.4

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      Description

      The current default settings are:

      optimizer_use_condition_selectivity=1
      use_stat_tables=NEVER
      

      This means many optimizations are not enabled.

      During discussion on the optimizer call, figured that we should use defaults like so:

      optimizer_use_condition_selectivity=4
      use_stat_tables=PREFERABLY
      

      The task is:

      • change the defaults
      • This will cause some MTR test result differences
      • Go through the failing test and see:
        • some tests specifically require old settings. Set the variables for these tests.
        • some tests dont' update test results for these.

      cc Igor Babaev, Vicentiu Ciorbaru, Oleksandr Byelkin, varun gupta, Galina Shalygina

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              • Assignee:
                varun Varun Gupta
                Reporter:
                psergey Sergei Petrunia
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