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  1. MariaDB Server
  2. MDEV-4704

PROCESSLIST - Query Rank execution order

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    Details

    • Type: Task
    • Status: Open (View Workflow)
    • Priority: Minor
    • Resolution: Unresolved
    • Fix Version/s: None
    • Component/s: None
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      Description

      hi guys, based on MDEV-4672 / MDEV-4748
      could we see when a query will be executed?
      (i think in mdl.h this is called as wait-for graph? or maybe it's the "A pending metadata lock request."?)

      something like:
      show query order <query id>
      it will return:

      message query id
      waiting unlock table 1
      waiting alter table 2
      waiting xxxxxx 999999

      this is nice when we have a busy server and want know when a query will be executed (or not), and help DBA to kill it or not

      —
      we could put another column to see informations about a lock
      in MDEV-4619 we have a lock table in information schema, maybe this could be used here to link to that table, example:

      message locks query id
      waiting table lock 1,2,3,4,5 1234
      waiting lock tables 44 423
      waiting update 66 44

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              Assignee:
              Unassigned Unassigned
              Reporter:
              rspadim roberto spadim
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