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  1. MariaDB Server
  2. MDEV-15090

Reduce the overhead of writing undo log records

Details

    Description

      oltp_update_index.lua benchmark commits mini transaction 5 times. This causes log_sys->mutex contention.

      First two mini transactions (write of the first undo log record and the creation of the undo log header) can be combined.

      This change was verified to give ~10% better throughput.

      Attachments

        Issue Links

          causes

          Bug - A problem which impairs or prevents the functions of the product. MDEV-22770 trx_undo_report_rename() fails to release page latches

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

          Bug - A problem which impairs or prevents the functions of the product. MDEV-25979 Invalid undo page number written to DB_ROLL_PTR

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

          Activity

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            svoj Sergey Vojtovich created issue -
            svoj Sergey Vojtovich made changes -
            Field Original Value New Value
            Epic Link MDEV-14442 [ 64369 ]
            marko Marko Mäkelä made changes -
            Status Open [ 1 ] Confirmed [ 10101 ]
            marko Marko Mäkelä made changes -
            Status Confirmed [ 10101 ] In Progress [ 3 ]
            marko Marko Mäkelä made changes -
            Summary Combine the write of the first undo log record and the creation of the undo log header into a single mini-transaction Reduce the overhead of writing undo log records
            marko Marko Mäkelä made changes -
            issue.field.resolutiondate 2018-01-29 18:29:25.0 2018-01-29 18:29:25.085
            marko Marko Mäkelä made changes -
            Fix Version/s 10.3.5 [ 22905 ]
            Fix Version/s 10.3 [ 22126 ]
            Resolution Fixed [ 1 ]
            Status In Progress [ 3 ] Closed [ 6 ]
            marko Marko Mäkelä made changes -
            marko Marko Mäkelä made changes -
            serg Sergei Golubchik made changes -
            Workflow MariaDB v3 [ 85163 ] MariaDB v4 [ 133454 ]

            People

              marko Marko Mäkelä
              svoj Sergey Vojtovich
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              Dates

                Created:
                Updated:
                Resolved:

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