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  1. WiredTiger
  2. WT-4848

Fix perf regression when calculating differences

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: WT3.2.1, 4.0.11, 4.3.1, 3.6.14, 4.2.0-rc2
    • Component/s: None
    • Labels:
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      Description

      Automated testing has identified two performance tests with regressions when calculating differences for large document overwrites. There are two sources of slowdown: the calculation of differences adds CPU load, and reads with (many) diffs are slower than reads of complete documents.

      Attempt to address these regressions without losing the benefits to cache pressure of calculating differences.

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            • Assignee:
              michael.cahill Michael Cahill
              Reporter:
              michael.cahill Michael Cahill
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              • Created:
                Updated:
                Resolved: