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  1. WiredTiger
  2. WT-6532

Size regression for Linkbench starting with rc12

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    Details

    • Type: Bug
    • Status: In Progress
    • Priority: Major - P3
    • Resolution: Unresolved
    • Affects Version/s: 4.4.0-rc12, 4.4.0-rc13
    • Fix Version/s: 4.5 Required
    • Component/s: None
    • Labels:
      None
    • Story Points:
      13
    • Sprint:
      Storage - Ra 2020-07-27, Storage - Ra 2020-08-10

      Description

      For Linkbench with maxid=200M the database size in GB after 1 hour of transactions is:

      • 451, 382, and 367 for rc13, rc9 and 4.2.8 without Snappy compression
      • 233, 215 and 204 for rc13, rc9 and 4.2.8 with Snappy compression

      The regression started with rc12 although I didn't list the results for that above. Much more performance data is here. I don't see a significant regression in size for the insert benchmark. It is ~10% there.

      The biggest growth is from _id which is ~2X larger now in rc12 & rc13 compared to 4.2.8. That looks like a return of WT-6251

        Attachments

        1. 6532-compare-11-12-mlock.png
          6532-compare-11-12-mlock.png
          357 kB
        2. compare-rc11-12.png
          compare-rc11-12.png
          422 kB
        3. compare-rc11-12-1.png
          compare-rc11-12-1.png
          422 kB
        4. compare-rc14-without-6487.png
          compare-rc14-without-6487.png
          632 kB
        5. ftdc.size.tar.gz
          126.96 MB
        6. repro.30m.tgz
          17.30 MB

          Activity

            People

            Assignee:
            sulabh.mahajan Sulabh Mahajan
            Reporter:
            mark.callaghan Mark Callaghan
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              Dates

              Created:
              Updated: