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  1. Core Server
  2. SERVER-50756

add occupied disk size to dbstats

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Details

    • Improvement
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • None
    • 4.9.0-alpha0
    • Storage
    • None
    • Fully Compatible
    • Execution Team 2020-10-05

    Description

      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.

      Attachments

        Issue Links

          causes

          Bug - A problem which impairs or prevents the functions of the product. SERVER-62277 Performance regression from dbstats due to occupied disk space calculation

          • Critical - P2 - Crashes, loss of data, severe memory leak.
          • Closed
          is documented by

          Task - A task that needs to be done. DOCS-13901 Investigate changes in SERVER-50756: add occupied disk size to dbstats

          • Major - P3 - Major loss of function.
          • Closed
          is related to

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-42037 Expose WiredTiger block-manager stats with scale support

          • Minor - P4 - Minor loss of function, or other problem where easy workaround is present.
          • Closed

          Activity

            People

              louis.williams@mongodb.com Louis Williams
              milkie@mongodb.com Eric Milkie
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              Dates

                Created:
                Updated:
                Resolved: