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  1. Hive
  2. HIVE-7926 long-lived daemons for query fragment execution, I/O and caching
  3. HIVE-10155

LLAP: switch to sensible cache policy

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    • Sub-task
    • Status: Resolved
    • Major
    • Resolution: Duplicate
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    Description

      FIFO policy is currently the default. We can test LRFU one but there were concerns that it won't scale. One option is to implement a two-tier policy, FIFO/LRU for blocks referenced once, and something more complex (LFU, LRFU) for blocks referenced more than once. That should be friendly to large scans of a fact table in terms of behavior and overhead.

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        duplicates

        Bug - A problem which impairs or prevents the functions of the product. HIVE-13346 LLAP doesn't update metadata priority when reusing from cache; some tweaks in LRFU policy

        • Major - Major loss of function.
        • Closed
        is related to

        Improvement - An improvement or enhancement to an existing feature or task. HIVE-13471 TinyLFU cache

        • Major - Major loss of function.
        • Open

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            sershe Sergey Shelukhin Assign to me
            sershe Sergey Shelukhin
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