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  1. Core Server
  2. SERVER-36041

Increase the size of changelog and actionlog

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Details

    • Improvement
    • Status: Closed
    • Minor - P4
    • Resolution: Fixed
    • None
    • 3.6.7, 4.0.1, 4.1.1
    • Diagnostics, Sharding
    • None
    • Fully Compatible
    • v4.0, v3.6
    • Sharding 2018-07-16
    • 0

    Description

      The (uncompressed) changelog and actionlog size is currently 10MB and 2MB respectively.

      On busy clusters (many concurrent chunk migrations and splits), I have seen the changelog window shrink to ~2 hours.

      For diagnostic purposes it would be useful to increase the changelog and actionlog size to hold a longer time window.

      Suggested sizes:

      • changelog: 200 MB (20x)
      • actionlog: 20 MB (10x, as it tends to be less subject to writes in a busy cluster)

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            sarah.zhou@mongodb.com Sarah Zhou
            josef.ahmad@mongodb.com Josef Ahmad
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            Dates

              Created:
              Updated:
              Resolved: