Uploaded image for project: 'IMPALA'
  1. IMPALA
  2. IMPALA-7731

Add ratio between scanned and transmitted bytes to fragment instances

    XMLWordPrintableJSON

    Details

      Description

      Selective scans (and by extension selective fragment instances) take higher performance hits when reading data remotely. They can be identified by a low ratio between data being transmitted vs data being read from HDFS. To make it easier to spot those instances we should add this ratio to each instance and to the root of the execution profile.

        Attachments

        1. Selective Scan Slowdowns.png
          37 kB
          Lars Volker

          Activity

            People

            • Assignee:
              lv Lars Volker
              Reporter:
              lv Lars Volker
            • Votes:
              0 Vote for this issue
              Watchers:
              3 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved: