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  1. MariaDB Server
  2. MDEV-12266

Reduce the number of InnoDB tablespace lookups

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    • 10.3.6-1

    Description

      InnoDB used to hide the definition of fil_space_t and use numeric tablespace ID everywhere. This causes a large number of tablespace lookups and thus contention on the fil_system->mutex.

      We should store fil_space_t* where possible to reduce the number of tablespace lookups:

      • fil_system->sys_space for the innodb_system tablespace
      • fil_system->temp_space for the innodb_temporary tablespace
      • dict_table_t::space for user tables
      • optionally, rseg_t::space for rollback segment header pages and and undo logs

      Also, we should use atomic memory access in fil_space_release() and avoid acquiring the mutex there. Furthermore, some accessor functions, such as fil_space_get_type() and fil_space_get_first_path() must be removed.

      Attachments

        Issue Links

          blocks

          Bug - A problem which impairs or prevents the functions of the product. MDEV-15983 Reduce fil_system.mutex contention further

          • Major - Major loss of function.
          • Closed

          Task - A task that needs to be done. MDEV-25312 Remove fil_space_t::name and related code

          • Blocker - Blocks development and/or testing work, production could not run.
          • Closed
          causes

          Bug - A problem which impairs or prevents the functions of the product. MDEV-15767 innodb.101_compatibility fails on buildbot

          • Major - Major loss of function.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-21563 FTS thread aborts during shutdown

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-34823 Invalid arguments in ib_push_warning()

          • Major - Major loss of function.
          • Closed

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            People

              marko Marko Mäkelä
              ratzpo Rasmus Johansson (Inactive)
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              Dates

                Created:
                Updated:
                Resolved:

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