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  1. MariaDB Server
  2. MDEV-7948

Protocol::write() takes 0.07% in OLTP RO

        Details

        • Type: Bug
        • Status: Open
        • Priority: Minor
        • Resolution: Unresolved
        • Affects Version/s: 10.1
        • Fix Version/s: 10.1
        • Component/s: None
        • Labels:
          None

          Description

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

          Call graphs:

          -   0.07%  mysqld  mysqld
   - Protocol::write()
      + 38.69% end_send(JOIN*, st_join_table*, bool)
      + 31.51% select_send::send_result_set_metadata(List<Item>&, unsigned int)
      + 27.18% select_send::send_data(List<Item>&)
      + 1.43% end_send_group(JOIN*, st_join_table*, bool)
      + 1.18% Protocol::send_result_set_metadata(List<Item>*, unsigned int)

          A very good candidate for inlining:

          bool Protocol::write()
{
  DBUG_ENTER("Protocol::write");
  DBUG_RETURN(my_net_write(&thd->net, (uchar*) packet->ptr(),
                           packet->length()));
}

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                  People

                  • Assignee:
                    bar Alexander Barkov
                    Reporter:
                    svoj Sergey Vojtovich
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                    Dates

                    • Created:
                      Updated: