Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-17484

New defaults for eq_range_index_dive_limit in 10.4

    XMLWordPrintable

    Details

      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
      Sergei Petrunia Igor Babaev for your information

        Attachments

          Issue Links

            Activity

              People

              Assignee:
              varun Varun Gupta
              Reporter:
              psergey Sergei Petrunia
              Votes:
              0 Vote for this issue
              Watchers:
              7 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved: