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  1. MariaDB Server
  2. MDEV-7899

10.1 is 3% slower than 10.0 in OLTP RO

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    Description

      Even though 10.1 has quite a few generic optimizations it still shows slightly worse performance compared to 10.0. This trend can be reproduced quite reliably on different platforms (10.0 -> 10.1):

      1 thread avg TPS: 805.91 -> 780.83 (3.11%)
      		 
      1 thread max TPS: 810.60 -> 788.50 (2.73%)
      		 
      64 threads avg TPS: 23026.92 -> 22346.58 (2.95%)
      		 
      64 threads max TPS: 23245.01 -> 22666.61 (2.49%)

      One of the biggest contributors to this slowdown (~2%) seem to be Exec_time_tracker. I get the following numbers if it is commented out (10.0 -> 10.1):

      1 thread avg TPS: 805.91 -> 796.44 (1.18%)
      		 
      1 thread max TPS: 810.60 -> 806.29 (0.53%)

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          svoj Sergey Vojtovich created issue -
          psergei Sergei Petrunia made changes -
          Field Original Value New Value
          Assignee Sergey Vojtovich [ svoj ] Sergei Petrunia [ psergey ]
          psergei Sergei Petrunia made changes -
          Attachment psergey-mdev7899-remove-timings.diff [ 37607 ]
          psergei Sergei Petrunia made changes -
          Assignee Sergei Petrunia [ psergey ] Sergey Vojtovich [ svoj ]
          psergei Sergei Petrunia made changes -
          Labels analyze-stmt
          psergei Sergei Petrunia made changes -
          Component/s Optimizer [ 10200 ]
          svoj Sergey Vojtovich made changes -
          Assignee Sergey Vojtovich [ svoj ] Sergei Petrunia [ psergey ]
          psergei Sergei Petrunia made changes -
          Fix Version/s 10.1.4 [ 18400 ]
          Fix Version/s 10.1 [ 16100 ]
          Resolution Fixed [ 1 ]
          Status Open [ 1 ] Closed [ 6 ]
          svoj Sergey Vojtovich made changes -
          Epic Link MDEV-7941 [ 50796 ]
          ratzpo Rasmus Johansson (Inactive) made changes -
          Workflow MariaDB v2 [ 60345 ] MariaDB v3 [ 64476 ]
          serg Sergei Golubchik made changes -
          Workflow MariaDB v3 [ 64476 ] MariaDB v4 [ 148992 ]

          People

            psergei Sergei Petrunia
            svoj Sergey Vojtovich
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              Updated:
              Resolved:

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