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  1. Core Server
  2. SERVER-16736

support more than 1 checkpoint thread for WiredTiger

    Details

    • Type: New Feature
    • Status: Open
    • Priority: Major - P3
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: Backlog
    • Component/s: Storage, WiredTiger
    • Labels:

      Description

      Discussion started in SERVER-16665. WT supports multiple eviction threads but uses only 1 checkpoint thread. Both eviction and checkpoint threads can do compression when compression is used for a collection/index so more threads for checkpoint is likely to reduce write stalls during slow checkpoints. The wt_perf.c benchmark client uses more than 1 checkpoint thread, so I assume that is supported for WT.

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          Hide
          mdcallag Mark Callaghan added a comment -

          And if checkpoint cannot be multi-threaded it should still benefit from helper threads to do compression and call pwrite concurrent with other work done by the main checkpoint thread.

          Show
          mdcallag Mark Callaghan added a comment - And if checkpoint cannot be multi-threaded it should still benefit from helper threads to do compression and call pwrite concurrent with other work done by the main checkpoint thread.
          Hide
          pasette Dan Pasette added a comment -

          We hope this will be addressed by bounding the work we do in a checkpoint. See WT-1744.

          Show
          pasette Dan Pasette added a comment - We hope this will be addressed by bounding the work we do in a checkpoint. See WT-1744 .

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              Dates

              • Created:
                Updated: