Details

    • Type: Task
    • Status: Closed
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: WT2.5.2
    • Labels:

      Description

      I was looking at some statistics via the wtstats graph tool, and they don't appear to match those in the original file.

      The two statistics are:

      tracked dirty bytes in the cache
      

      and

      bytes currently in the cache
      

      The wtstats graph I see for those two statistics is:

      An extract of the raw data is:

      Mar 10 06:00:07 13937645434 /mnt/fast/alexg/data cache: tracked dirty bytes in the cache
      Mar 10 06:00:07 15032413045 /mnt/fast/alexg/data cache: bytes currently in the cache
      --
      Mar 10 06:00:17 14118949794 /mnt/fast/alexg/data cache: tracked dirty bytes in the cache
      Mar 10 06:00:17 15031434886 /mnt/fast/alexg/data cache: bytes currently in the cache
      --
      Mar 10 06:00:27 14245210823 /mnt/fast/alexg/data cache: tracked dirty bytes in the cache
      Mar 10 06:00:27 15032327122 /mnt/fast/alexg/data cache: bytes currently in the cache
      --
      Mar 10 06:00:37 13829546010 /mnt/fast/alexg/data cache: tracked dirty bytes in the cache
      Mar 10 06:00:37 14839582962 /mnt/fast/alexg/data cache: bytes currently in the cache
      --
      Mar 10 06:00:47 13598968927 /mnt/fast/alexg/data cache: tracked dirty bytes in the cache
      Mar 10 06:00:47 15030610981 /mnt/fast/alexg/data cache: bytes currently in the cache
      --
      Mar 10 06:00:57 13407003442 /mnt/fast/alexg/data cache: tracked dirty bytes in the cache
      Mar 10 06:00:57 15032283870 /mnt/fast/alexg/data cache: bytes currently in the cache
      --
      Mar 10 06:01:07 14325052454 /mnt/fast/alexg/data cache: tracked dirty bytes in the cache
      Mar 10 06:01:07 15031068774 /mnt/fast/alexg/data cache: bytes currently in the cache
      --
      Mar 10 06:01:17 14373973388 /mnt/fast/alexg/data cache: tracked dirty bytes in the cache
      Mar 10 06:01:17 15031787034 /mnt/fast/alexg/data cache: bytes currently in the cache
      --
      Mar 10 06:01:27 14959868383 /mnt/fast/alexg/data cache: tracked dirty bytes in the cache
      Mar 10 06:01:27 15032397299 /mnt/fast/alexg/data cache: bytes currently in the cache
      --
      Mar 10 06:01:37 14865619787 /mnt/fast/alexg/data cache: tracked dirty bytes in the cache
      Mar 10 06:01:37 15032398484 /mnt/fast/alexg/data cache: bytes currently in the cache
      

      I wonder whether the tool is treating the tracked dirty bytes as a running total rather than an absolute number?

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              • Assignee:
                alexander.gorrod Alexander Gorrod
                Reporter:
                alexander.gorrod Alexander Gorrod
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                • Created:
                  Updated:
                  Resolved: