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  1. MariaDB Server
  2. MDEV-7952

clock_gettime() takes 0.24% in OLTP RO

        Details

        • Type: Bug
        • Status: Closed
        • Priority: Major
        • Resolution: Fixed
        • Affects Version/s: 10.1
        • Fix Version/s: 10.1.6
        • Component/s: OTHER
        • Labels:
          None

          Description

          Data comes from Sandy Bridge system running sysbench OLTP RO in 1 thread against 1 table.

          Call graphs:

          -   0.24%  mysqld  librt-2.15.so        [.] clock_gettime
   - clock_gettime
      + 43.38% tc_release_table(TABLE*)
      + 40.03% dispatch_command(enum_server_command, THD*, char*, unsigned int)
      + 10.67% MDL_context::acquire_lock(MDL_request*, double)
      + 5.93% mysql_lock_tables(THD*, st_mysql_lock*, unsigned int)

          Check if there's cheaper timer available.

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                  svoj Sergey Vojtovich added a comment -

                  Sergei Golubchik, please review patch for this task:

                  [Commits] 3f0b023: MDEV-7952 - clock_gettime() takes 0.24% in OLTP RO
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                  svoj Sergey Vojtovich added a comment - Sergei Golubchik , please review patch for this task: [Commits] 3f0b023: MDEV-7952 - clock_gettime() takes 0.24% in OLTP RO

                    People

                    • Assignee:
                      svoj Sergey Vojtovich
                      Reporter:
                      svoj Sergey Vojtovich
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