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  1. WiredTiger
  2. WT-4694

Dynamic compression throughput varies widely

    • 8
    • Storage Engines 2019-05-06, Storage Engines 2019-05-20, Storage Engines 2019-06-03, Storage Engines 2019-06-17, Storage Engines 2019-07-01
    • v4.2

      While it shows large improvement, the long-running (2 hour) large-data Jenkins test for read-only is showing wildly varying throughput. The throughput numbers used to be very stable and are now swinging by 200% since the merge of WT-4433 for dynamic compression.

      This is only on the read-only test. The earlier, also long-running, tests for populate and read/update mixes do not show this variation. The plot is here: http://build.wiredtiger.com:8080/job/wiredtiger-perf-long/plot/

      I have attached the current version of the plot that illustrates this problem in case the link ages out of the pre-merge information.

        1. 8k0.png
          40 kB
          Alex Cameron
        2. 8k1.png
          41 kB
          Alex Cameron
        3. best0.png
          40 kB
          Alex Cameron
        4. best1.png
          40 kB
          Alex Cameron
        5. latency.png
          192 kB
          Susan LoVerso
        6. ok0.png
          41 kB
          Alex Cameron
        7. ok1.png
          40 kB
          Alex Cameron
        8. other.png
          106 kB
          Susan LoVerso
        9. reads.png
          49 kB
          Susan LoVerso

            Assignee:
            alex.cameron@mongodb.com Alex Cameron (Inactive)
            Reporter:
            sue.loverso@mongodb.com Susan LoVerso
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              Created:
              Updated:
              Resolved: