Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-27935

Enable performance_schema profiling for trx_rseg_t latch

    XMLWordPrintable

Details

    Description

      • In 10.6, trx_rseg_t mutex was ported to use latch. As part of this porting profiling of the patch was removed. This patch reenables it given that the said latch continues to occupy the top slots in the contention list

      When I applied the said patch and enabled profiling trx_rseg_latch_key was 2nd hottest instrument from the InnoDB SE perspective.

      wait/synch/cond/threadpool/worker_cond 46351983.3024 167603
      wait/synch/mutex/innodb/log_sys_mutex 8716632.1922 122968738
      wait/synch/cond/mysys/COND_timer 1516437.4227 5397
      wait/synch/cond/threadpool/timer_cond 1515688.2689 3025
      wait/synch/cond/aria/SERVICE_THREAD_CONTROL::COND_control 1501997.0416 50
      wait/synch/rwlock/innodb/trx_rseg_latch_key 342616.7699 98834024

      Attachments

        Issue Links

          causes

          Bug - A problem which impairs or prevents the functions of the product. MDEV-28049 Error on compiling of trx0purge.cc

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

          Bug - A problem which impairs or prevents the functions of the product. MDEV-25062 InnoDB read-write workload hits contention arising from rollback segment mutex

          • Major - Major loss of function.
          • Closed

          Activity

            People

              marko Marko Mäkelä
              krunalbauskar Krunal Bauskar
              Votes:
              0 Vote for this issue
              Watchers:
              2 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.