Create a new stat to capture the number of extents

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    • Type: Task
    • Resolution: Unresolved
    • Priority: Major - P3
    • None
    • Affects Version/s: None
    • Component/s: Block Manager, Statistics
    • None

      We don't have visibility on the disk fragmentation for a given file. On way to get there is to use the following formula defined in WT-16684:

      FI = (1 - (1 / N)) * (Total Free Space / Total File Size) * 100
(Where 'N' is the total number of free extents in the file).

      We want to get N through stats for the alloc and avail extent lists.

      The work is to create the relevant stats so we can observe N in the FTDC and update logs so we have the number of extent lists and the fragmentation ratio.

            Assignee:
            [DO NOT USE] Backlog - Storage Engines Team
            Reporter:
            Etienne Petrel
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              Created:
              Updated: