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

Update query option docs to account for interactions with mt_dop

Attach filesAttach ScreenshotVotersWatch issueWatchersCreate sub-taskLinkCloneUpdate Comment AuthorReplace String in CommentUpdate Comment VisibilityDelete Comments
    XMLWordPrintableJSON

Details

    • Improvement
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • None
    • Impala 4.0.0
    • Docs
    • 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

          This comment will be Viewable by All Users Viewable by All Users
          Cancel

          People

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

            Dates

              Created:
              Updated:
              Resolved:

              Slack

                Issue deployment