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  1. MariaDB Server
  2. MDEV-7952

clock_gettime() takes 0.24% in OLTP RO

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Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 10.1(EOL)
    • 10.1.6
    • OTHER
    • 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)

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              svoj Sergey Vojtovich
              svoj Sergey Vojtovich
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                Created:
                Updated:
                Resolved:

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