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  1. Core Server
  2. SERVER-35657

Do not delay journal flushes when operations are waiting for oplog visibility

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: 3.6.6, 4.0.0-rc5
    • Fix Version/s: 3.6.9, 4.0.3, 4.1.3
    • Component/s: Storage
    • Labels:
    • Backwards Compatibility:
      Fully Compatible
    • Operating System:
      ALL
    • Backport Requested:
      v4.0, v3.6
    • Steps To Reproduce:
      Hide

      1. Configure 1-node replica set
      2. Select any benchmark with a mix of updates and reads (I chose YCSB)
      3. Compare performance between read concern majority, non-causal against read concern local, causal.

      Show
      1. Configure 1-node replica set 2. Select any benchmark with a mix of updates and reads (I chose YCSB) 3. Compare performance between read concern majority, non-causal against read concern local, causal.
    • Sprint:
      Storage NYC 2018-07-02, Storage NYC 2018-07-16, Storage NYC 2018-07-30, Storage NYC 2018-08-13, Storage NYC 2018-08-27
    • Linked BF Score:
      0

      Description

      In a recent examination of transactions performance it was observed that specific combinations of read concern, topology, and causal settings caused significant performance slowdowns for read operations. Most notably the single-node replica sets using local read concern and causal consistency. In a build failure ticket we tracked this to the following work: SERVER-31679

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              Dates

              • Created:
                Updated:
                Resolved: