Don't busy wait when syncing the log and waiting for writes to complete

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    • Type: Task
    • Resolution: Fixed
    • Priority: Major - P3
    • 3.6.0-rc5, WT3.0.0
    • Affects Version/s: None
    • Component/s: None
    • None
    • Storage 2017-12-04
    • None

      While looking at FTDC for the insert workload from SERVER-31694, I noticed some interesting WT log statistics. Namely we are force writing the log slot almost as many times as we write a log record. MongoDB uses the in-memory mode for maximal consolidation and performance. There are a number of places where and reasons why we force out the current in-memory log records. We should investigate where these calls are coming from.

      Most of these are effectively a no-op because in attempting to force out the log records we find we can skip it because there are no outstanding records to write.

              Assignee:
              Susan LoVerso (Inactive)
              Reporter:
              Susan LoVerso (Inactive)
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                Created:
                Updated:
                Resolved: