Details

    • Type: Sub-task
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.99.0
    • Component/s: BlockCache
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      From the parent issue, Todd reminds us of the old Jim Gray '5 minute rule' on whether to cache.

      In master, we were reporting age only it was the inactionable inverse of 'how long blocks are staying in the cache'.

      Let me add to our cache stats a histogram of age on eviction and change the UI reporting so it is age at eviction (plus stddev). The JSON version has percentiles (and if wanted, the old age report of age of items in cache).

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        1. 11573.txt
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          Michael Stack
        2. Screen Shot 2014-07-22 at 5.17.27 PM.png
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          Michael Stack
        3. 11573v2.txt
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          Michael Stack
        4. 11573v3.txt
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          Michael Stack
        5. 11573v4.txt
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          Michael Stack
        6. 11573v5.txt
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          Michael Stack
        7. 11573v7.txt
          23 kB
          Michael Stack
        8. 11573v8.txt
          23 kB
          Michael Stack
        9. 11573v8.txt
          23 kB
          Michael Stack

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            • Assignee:
              stack Michael Stack
              Reporter:
              stack Michael Stack
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              • Created:
                Updated:
                Resolved: