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  1. MariaDB Server
  2. MDEV-17484

New defaults for eq_range_index_dive_limit in 10.4

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    Description

      See https://lists.launchpad.net/maria-developers/msg11460.html :

      So, MDEV-16934 introduced eq_range_index_dives_limit into 10.2.8 and 10.3.0.

      The default was set to 0 (which means no limit) in order to not introduce
      optimizer behavior changes into stable versions.

      The question is: should 10.4 also have 0 by default or we can set it to some
      finite limit? MySQL's default value is 10.

      After the decision was: It should be set to 10. This is what this task is about.

      Saw MYSQL 8.0 , the default there is 200
      https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html#sysvar_eq_range_index_dive_limit
      psergey igor for your information

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-17486 eq_range_index_dives_limit option/variable is not documented

          • Major - Major loss of function.
          • Closed

          Activity

            Transition Time In Source Status Execution Times
            Varun Gupta (Inactive) made transition -
            Open In Progress
            		79d 1h 1m 1
            Varun Gupta (Inactive) made transition -
            In Progress Stalled
            		5d 14h 46m 1
            Varun Gupta (Inactive) made transition -
            Stalled Closed
            		22d 10h 18m 1

            People

              varun Varun Gupta (Inactive)
              psergei Sergei Petrunia
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