Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-5864

Reduce usage of LOCK_open: TABLE_SHARE::tdc.free_tables

Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 10.0.9
    • 10.0.10
    • None
    • None

    Description

      tc_acquire_table and tc_release_table are critical sections of table cache. Among other things, they update TABLE_SHARE::tdc.free_tables:
      tc_acquire_table - pop TABLE object from free_tables
      tc_release_table - push TABLE object to free_tables

      Updating free_tables list is protected by global mutex. Since free_tables is per-share list we can protect it by per-share mutex instead.

      This is simple intermediate change that improves table cache scalability in many loads.

      Attachments

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-7292 Table_open_cache scalability issues

          • Major - Major loss of function.
          • Closed

          Task - A task that needs to be done. MDEV-4702 Reduce usage of LOCK_open

          • Major - Major loss of function.
          • Closed

          Task - A task that needs to be done. MDEV-4956 Reduce usage of LOCK_open: TABLE_SHARE::tdc.used_tables

          • Major - Major loss of function.
          • Closed

          Task - A task that needs to be done. MDEV-5388 Reduce usage of LOCK_open: unused_tables

          • Major - Major loss of function.
          • Closed

          Task - A task that needs to be done. MDEV-5403 Reduce usage of LOCK_open: tc_count

          • Major - Major loss of function.
          • Closed

          Task - A task that needs to be done. MDEV-5492 Reduce usage of LOCK_open: TABLE::in_use

          • Major - Major loss of function.
          • Closed

          Task - A task that needs to be done. MDEV-5597 Reduce usage of LOCK_open: LOCK_flush

          • Major - Major loss of function.
          • Closed

          Activity

            Ascending order - Click to sort in descending order
            svoj Sergey Vojtovich created issue -
            svoj Sergey Vojtovich made changes -
            Field Original Value New Value
            svoj Sergey Vojtovich made changes -
            svoj Sergey Vojtovich made changes -
            svoj Sergey Vojtovich made changes -
            svoj Sergey Vojtovich made changes -
            svoj Sergey Vojtovich made changes -
            svoj Sergey Vojtovich made changes -
            Assignee Sergey Vojtovich [ svoj ] Sergei Golubchik [ serg ]
            serg Sergei Golubchik made changes -
            Assignee Sergei Golubchik [ serg ] Sergey Vojtovich [ svoj ]
            svoj Sergey Vojtovich made changes -
            Resolution Fixed [ 1 ]
            Status Open [ 1 ] Closed [ 6 ]
            serg Sergei Golubchik made changes -
            Workflow defaullt [ 36811 ] MariaDB v2 [ 42539 ]
            tanj Guillaume Lefranc made changes -
            ratzpo Rasmus Johansson (Inactive) made changes -
            Workflow MariaDB v2 [ 42539 ] MariaDB v3 [ 61505 ]
            serg Sergei Golubchik made changes -
            Workflow MariaDB v3 [ 61505 ] MariaDB v4 [ 147636 ]

            People

              svoj Sergey Vojtovich
              svoj Sergey Vojtovich
              Votes:
              0 Vote for this issue
              Watchers:
              3 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:

                Git Integration

                  Error rendering 'com.xiplink.jira.git.jira_git_plugin:git-issue-webpanel'. Please contact your Jira administrators.