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  1. MariaDB Server
  2. MDEV-15706

Remove information_schema.innodb_metrics, innodb_monitor_enable, innodb_monitor_disable

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      The InnoDB monitor was a precursor of PERFORMANCE_SCHEMA in InnoDB, added in MySQL 5.5.
      There should be only one (good) performance monitoring mechanism. Now we have several:

      • SHOW ENGINE INNODB STATUS (hopefully to be removed at some part of future)
      • INFORMATION_SCHEMA.GLOBAL_STATUS
      • INFORMATION_SCHEMA.INNODB_METRICS (to be removed in this task)
      • PERFORMANCE_SCHEMA

      We should evaluate all the INNODB_METRICS counters and construct a mapping to the PERFORMANCE_SCHEMA or GLOBAL_STATUS counters correspond to them. There may be some obscure counters that can be removed; also these must be documented. Some counters may need to be added to PERFORMANCE_SCHEMA or GLOBAL_STATUS. If updating some status is not expensive, we might as well update it all the time and expose via GLOBAL_STATUS.

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              Assignee:
              thiru Thirunarayanan Balathandayuthapani
              Reporter:
              marko Marko Mäkelä
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                Updated: