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  1. MariaDB Server
  2. MDEV-39574

Performance Regression in ps-covered-id in mariadb 10.5.29 because of MDEV-15058

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Details

    • Related to performance
    • Closing as no further update from submitter. Specific issue relates to EOL version. Related fixes are complete in supported versions.

    Description

      ps-covered-pk - select id from sbtest where id in ( 100 random ids) , regressed between 10.5.29 release to 10.4.34 release
      Reference: https://smalldatum.blogspot.com/2026/04/cpu-bound-sysbench-on-large-server.html
      On my laptop 6 core , it shows 10% drop and buf_pool_mutex is hot in 10.5.29

      Attachments

        1. 10.4vs10.5-ps-covered-pk.pdf
          65 kB
          Amrendra Kumar
        2. avg wait time of in 10.4 vs 10.5.txt
          2 kB
          Amrendra Kumar
        3. ps-covered-pk_ BP-2GB, memory bound 10.4.34 Vs 10.5.x.pdf
          530 kB
          Amrendra Kumar
        4. screenshot-1.png
          25 kB
          Steve Shaw
        5. screenshot-2.png
          56 kB
          Amrendra Kumar
        6. Screenshot from 2026-05-07 17-18-38.png
          36 kB
          Amrendra Kumar

        Issue Links

          relates to

          Epic - Created by Jira Software - do not edit or delete. Issue type for a big user story that needs to be broken down. MDEV-37924 buf_pool.mutex contention under I/O-limited OLTP workload

          • Critical - Crashes, loss of data, severe memory leak.
          • In Progress
          has action item

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            People

              Steve Shaw Steve Shaw
              amroo76 Amrendra Kumar
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              Dates

                Created:
                Updated:
                Resolved:

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