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  1. Hive
  2. HIVE-18939 LLAP cache manageability improvements (local)
  3. HIVE-16992

LLAP: monitoring and better default lambda for LRFU policy

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    • Sub-task
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 3.0.0
    • None
    • None

    Description

      LRFU is currently skewed heavily towards LRU; there are 10k-s or 100k-s of buffers tracked during a typical workload, but the heap size is around 700. We should see if making it closer to LFU (by tweaking the lambda) will improve hit rate with small queries infrequently interleaved with large scans; and whether it will have negative effects due to perf overhead.

      Attachments

        1. HIVE-16992.patch
          65 kB
          Sergey Shelukhin

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              sershe Sergey Shelukhin
              sershe Sergey Shelukhin
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                Created:
                Updated:
                Resolved: