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  1. MariaDB Server
  2. MDEV-23590

P_S.replication_applier_status_by_worker table is missing

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      It seems worker threads of parallel replication are NOT instrumented in MariaDB 10.5's Performance Schema. We see thew following 4 replication tables:

      MariaDB [performance_schema]> show tables like 'replication%';
      +---------------------------------------------+
      | Tables_in_performance_schema (replication%) |
      +---------------------------------------------+
      | replication_applier_configuration           |
      | replication_applier_status                  |
      | replication_applier_status_by_coordinator   |
      | replication_connection_configuration        |
      +---------------------------------------------+
      4 rows in set (0,001 sec)
       
      MariaDB [performance_schema]> select version();
      +----------------+
      | version()      |
      +----------------+
      | 10.5.6-MariaDB |
      +----------------+
      1 row in set (0,038 sec)
      

      and for me it does not make se4nse to instrument coordinator thread without instrumenting worker threads. MySQL 5.7 has the replication_applier_status_by_worker table for this (https://dev.mysql.com/doc/refman/5.7/en/performance-schema-replication-applier-status-by-worker-table.html), and it should be added to MariaDB.

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              Assignee:
              Unassigned Unassigned
              Reporter:
              valerii Valerii Kravchuk
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                Resolved:

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