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  1. Documentation
  2. DOCS-11002

Make oplog queries with point equality on ts field use getOplogStartHack (SERVER-29843)

    • Type: Icon: Task Task
    • Resolution: Fixed
    • Priority: Icon: Major - P3 Major - P3
    • 3.6.0-rc4
    • Affects Version/s: None
    • Component/s: manual, Server
    • Labels:

      Documentation Request Summary:

      No documentation summary in engineering ticket

      Engineering Ticket Description:

      Doing point queries on the ts field is slow in the oplog because the oplog does not have any indexes. WT has a hack that allows it to do binary search on the ts field but is only enabled when the query predicate has top level $gt/$gte.

      This is needed by retryable writes in order to do fast lookup on oplog entries when traversing through the write history within a transaction.

            andrew.aldridge@mongodb.com Andrew Aldridge
            kay.kim@mongodb.com Kay Kim (Inactive)
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              6 years, 12 weeks, 6 days ago