Uploaded image for project: 'Cassandra'
  1. Cassandra
  2. CASSANDRA-4656

StorageProxy histograms

    XMLWordPrintableJSON

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Low
    • Resolution: Fixed
    • Fix Version/s: 1.1.6
    • Component/s: None
    • Labels:
      None

      Description

      I suggest to do two improvements:
      1. StorageProxy histograms need to be added to the cli. In my opinion that statistic is very important, because it shows real server response time (with accounting of additional requests to other nodes). It can be usefull for gathering of the server response time statistics by some monitoring systems (without using additional JMX modules).

      2. Output of 'nodetool cfhistograms' command has an empty values in 'SSTables' column. Output is not usable for parse because of that. I suggest to insert '0' instead of empty values.

      Old output:

      Offset      SSTables     Write Latency      Read Latency          Row Size      Column Count
      1             109298                 0                 0                 0         128700943
      2                778                 0                 0                 0                 0
      ....
      1597                                 0               505                 0                 0
      1916                                 0               566                 0                 0
      

      New output:

      Offset      SSTables     Write Latency      Read Latency          Row Size      Column Count
      1             109298                 0                 0                 0         128700943
      2                778                 0                 0                 0                 0
      ....
      1597               0                 0               505                 0                 0
      1916               0                 0               566                 0                 0
      

      PS: I've attached a patch that fixes all described problems.

        Attachments

          Activity

            People

            • Assignee:
              azotcsit Alexey Zotov
              Reporter:
              azotcsit Alexey Zotov
              Authors:
              Alexey Zotov
              Reviewers:
              Brandon Williams
            • Votes:
              0 Vote for this issue
              Watchers:
              1 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved: