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  1. Core Server
  2. SERVER-5423

oplog length affect on memory

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    • Icon: Question Question
    • Resolution: Done
    • Icon: Major - P3 Major - P3
    • None
    • 2.0.3
    • Performance
    • RHEL 5.6
      one primary and three standby replica sets.
      Local disk storage with RAID 10
      RAM : 72GB
      Db size: 73GB
      OPLOG : 20GB

    Description

      Hi,

      We want to change the oplog size to 50GB on primary database because of the stale replication issues.
      after increasing the oplog,Will the local database(50GB) would be a part of mapped memory by mongod?

      what should be the impact on overall database performance in a replication/journal enabled environment, if the size of the database is larger than the available physical memory on the system.

      Thanks,
      Rajesh Bhatt

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            schwerin@mongodb.com Andy Schwerin
            rbhatt@book.com rajesh bhatt
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              Created:
              Updated:
              Resolved: