Uploaded image for project: 'IMPALA'
  1. IMPALA
  2. IMPALA-9586

Update query option docs to account for interactions with mt_dop

    XMLWordPrintableJSON

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: Impala 4.0
    • Component/s: Docs
    • Labels:
      None

      Description

      in some cases mt_dop changes the behaviour of other options or makes them a no-op. We need to update docs to reflect this.

      • Setting NUM_NODES=1 along with MT_DOP >=1 effectively reduces MT_DOP to 1, i.e. only one thread is used.
      • NUM_SCANNER_THREADS has no effect when MT_DOP>=1
      • Maybe other changes?

        Attachments

          Activity

            People

            • Assignee:
              tarmstrong Tim Armstrong
              Reporter:
              tarmstrong Tim Armstrong
            • Votes:
              0 Vote for this issue
              Watchers:
              2 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved: