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  1. Hive
  2. HIVE-18866

Semijoin and analyze: Implement a Long -> Hash64 vector fast-path

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    Description

      A significant amount of CPU is wasted with JMM restrictions on byte[] arrays.

      To transform from one Long -> another Long, this goes into a byte[] array, which shows up as a hotspot.

      Attachments

        1. 0001-hash64-WIP.patch
          10 kB
          Gopal Vijayaraghavan
        2. HIVE-18866.01.patch
          11 kB
          Sergey Shelukhin
        3. HIVE-18866.02.patch
          11 kB
          Sergey Shelukhin
        4. HIVE-18866.03.patch
          11 kB
          Sergey Shelukhin
        5. HIVE-18866.04.patch
          11 kB
          Sergey Shelukhin
        6. HIVE-18866.patch
          11 kB
          Sergey Shelukhin
        7. perf-hash64-long.png
          232 kB
          Gopal Vijayaraghavan

        Issue Links

        breaks

        Bug - A problem which impairs or prevents the functions of the product. HIVE-19713 itests/hive-jmh should not reference a concreate storage-api version

        • Major - Major loss of function.
        • Closed
        is blocked by

        Bug - A problem which impairs or prevents the functions of the product. HIVE-19660 update branch-3 to be version 3.1 and fix storage-api mismatch

        • Major - Major loss of function.
        • Closed
        relates to

        Bug - A problem which impairs or prevents the functions of the product. HIVE-19501 Fix HyperLogLog to be threadsafe

        • Major - Major loss of function.
        • Resolved

        Bug - A problem which impairs or prevents the functions of the product. HIVE-19578 HLL merges tempList on every add

        • Major - Major loss of function.
        • Closed

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            gopalv Gopal Vijayaraghavan Assign to me
            gopalv Gopal Vijayaraghavan
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              Created:
              Updated:
              Resolved:

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