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  1. MariaDB ColumnStore
  2. MCOL-4917

Certain Extent Map operations doesn't scale well.

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    • Sprint:
      2021-14, 2021-15, 2021-16, 2021-17

      Description

      There is a major deficiency in parts of EM code that makes the operations slower. We need to profile and introduce lookup structures to speed up read/write ops in EM. ExtentMap::getDbRootHWMInfo() must be overloaded to serve multiple oids at a time. ExtentMap::setLocalHWM is called multiple times compacting journal into EM on MCS shutdown(save_brm presumably). setLocalHWM is utterly slow that forces systemd to kill save_brm on timeout.

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              Assignee:
              drrtuy Roman
              Reporter:
              drrtuy Roman
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