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  1. MariaDB Server
  2. MDEV-11284

Extremely high cpu usage and slow performance after upgrade from 5.5.52 to 10.1.29

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    Description

      After upgrade from MariaDB 5.5.52 to 10.1.19 the performance of our application is about 5 times slower than before.

      It is noticeable that the MariaDB 10.1.19 has a cpu usage of 95%.
      With MariaDB 5.5.52 the cpu usage was only about 5%.

      I appended 2 pictures which shows the difference between these 2 versions.
      For both versions we used the same server with the same test application.
      The only difference is the upgrade of MariaDB.

      The settings of my.ini are appended.

      Attachments

        1. Performance of MariaDB 10.1.19.png
          Performance of MariaDB 10.1.19.png
          221 kB
        2. Performance of MariaDB 5.5.52.png
          Performance of MariaDB 5.5.52.png
          258 kB
        3. my.ini
          1 kB
        4. TimeMeasurement for SQLStatements of MariaDB 10.1.19.txt
          21 kB
        5. TimeMeasurement for SQLStatements of MariaDB 5.5.52
          21 kB
        6. MariaDB 10.1.19 caches 40000.png
          MariaDB 10.1.19 caches 40000.png
          111 kB
        7. MariaDB 10.1.19 caches 400000.png
          MariaDB 10.1.19 caches 400000.png
          77 kB
        8. MariaDB_5.5.52.png
          MariaDB_5.5.52.png
          78 kB
        9. status.txt
          492 kB
        10. mysqld.exe.2160.002
          1.42 MB
        11. mysqld.exe.2160.crc
          0.1 kB
        12. mysqld.exe_161128_064117.002
          7.03 MB
        13. mysqld.exe_161128_064117.crc
          0.1 kB
        14. mysqld.exe.2160.001
          10.00 MB
        15. mysqld.exe_161128_064117.001
          10.00 MB
        16. callstacks_10_1_19.txt
          43 kB
        17. procdump_output.txt
          4 kB
        18. mysqld.exe_161202_180716.001
          10.00 MB
        19. mysqld.exe_161202_180716.002
          10.00 MB
        20. mysqld.exe_161202_180716.003
          10.00 MB
        21. mysqld.exe_161202_180716.004
          10.00 MB
        22. mysqld.exe_161202_180716.012
          10.00 MB
        23. mysqld.exe_161202_180716.007
          10.00 MB
        24. mysqld.exe_161202_180716.008
          10.00 MB
        25. mysqld.exe_161202_180716.011
          10.00 MB
        26. mysqld.exe_161202_180716.005
          10.00 MB
        27. mysqld.exe_161202_180716.006
          10.00 MB
        28. mysqld.exe_161202_180716.009
          10.00 MB
        29. mysqld.exe_161202_180716.010
          10.00 MB
        30. mysqld.exe_161202_180716.013
          10.00 MB
        31. mysqld.exe_161202_180716.015
          207 kB
        32. mysqld.exe_161202_180716.crc
          0.1 kB
        33. mysqld.exe_161202_180716.014
          10.00 MB

        Activity

          People

            axel Axel Schwenke
            migra Michael Graf
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            Dates

              Created:
              Updated:
              Resolved:

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