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  1. Hive
  2. HIVE-13013

Further Improve concurrency in TxnHandler

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Details

    • Bug
    • Status: Closed
    • Critical
    • Resolution: Fixed
    • 1.0.0
    • 1.3.0, 2.1.0
    • Metastore, Transactions
    • None

    Description

      There are still a few operations in TxnHandler that run at Serializable isolation.
      Most or all of them can be dropped to READ_COMMITTED now that we have SELECT ... FOR UPDATE support. This will reduce number of deadlocks in the DBs.

      Attachments

        1. HIVE-13013.2.patch
          51 kB
          Eugene Koifman
        2. HIVE-13013.3.patch
          51 kB
          Eugene Koifman
        3. HIVE-13013.4.patch
          52 kB
          Eugene Koifman
        4. HIVE-13013.patch
          50 kB
          Eugene Koifman

        Issue Links

          is blocked by

          Bug - A problem which impairs or prevents the functions of the product. HIVE-11948 Investigate TxnHandler and CompactionTxnHandler to see where we improve concurrency

          • Major - Major loss of function.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. HIVE-11388 Allow ACID Compactor components to run in multiple metastores

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Activity

            People

              ekoifman Eugene Koifman
              ekoifman Eugene Koifman
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              Dates

                Created:
                Updated:
                Resolved: