add occupied disk size to dbstats

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    • Type: Improvement
    • Resolution: Fixed
    • Priority: Major - P3
    • 4.9.0-alpha0
    • Affects Version/s: None
    • Component/s: Storage
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    • Fully Compatible
    • Execution Team 2020-10-05
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    • 3
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      There is a need to calculate the amount of occupied disk space a database is consuming. This can be useful when calculating whether a database could be physically moved to a smaller disk size. Currently, only the on-disk file size is reported by dbstats, but this includes unoccupied blocks in files.
      To calculate this for WiredTiger, we can use block_reuse_bytes statistic per file, versus block_size.

              Assignee:
              Louis Williams
              Reporter:
              Eric Milkie
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                Created:
                Updated:
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