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  1. Kudu
  2. KUDU-749

Improve performance for zipfian update

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Details

    • Improvement
    • Status: Open
    • Major
    • Resolution: Unresolved
    • Private Beta
    • None
    • perf, tablet

    Description

      A zipfian 50/50 update/read workload on YCSB gets slower and slower until it's pretty intolerable (random reads taking 100+ms of CPU). It seems like all the CPU is spent in DMSIterator::PrepareBatch. We're probably doing something dumb here - let's look for some low hanging fruit to fix this.

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        1. screenshot-2.png
          72 kB
          Todd Lipcon
        2. screenshot-1.png
          62 kB
          Todd Lipcon

        Issue Links

          is related to

          Improvement - An improvement or enhancement to an existing feature or task. KUDU-2826 Add redo tail for mutation list to accelerate UPDATE in memrowset

          • Major - Major loss of function.
          • Resolved

          Improvement - An improvement or enhancement to an existing feature or task. KUDU-686 Delta apply optimizations

          • Trivial - Cosmetic problem like misspelt words or misaligned text.
          • Resolved

          Activity

            People

              Unassigned Unassigned
              tlipcon Todd Lipcon
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              Dates

                Created:
                Updated: