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  1. Documentation
  2. DOCS-11374

Calculation for WiredTiger cache is misleading

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Details

    • Bug
    • Status: Closed
    • Minor - P4
    • Resolution: Fixed
    • 3.6 Core Server, 3.4.7
    • None
    • dochub, manual
    • None
    • true

    Description

      https://docs.mongodb.com/manual/faq/storage/

      50% of RAM minus 1 GB, or

      I read this as (.5 * RAM) - 1GB.

      The calculation is actually:
      (RAM - 1GB) * .5

      https://github.com/mongodb/mongo/blob/r3.6.2/src/mongo/db/storage/wiredtiger/wiredtiger_util.cpp#L342

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            brian.moss@mongodb.com Brian Moss
            kevin.arhelger@mongodb.com Kevin Arhelger
            Kevin Adistambha Kevin Adistambha
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            Dates

              Created:
              Updated:
              Resolved:
              4 years, 22 weeks, 4 days ago