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  1. Accumulo
  2. ACCUMULO-1062

large numbers of threads make in-memory updates slow

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Details

    • Bug
    • Status: Resolved
    • Critical
    • Resolution: Fixed
    • 1.4.2
    • 1.4.3, 1.5.0
    • tserver
    • None

    • testing on large clusters

    Description

      Using hundreds of ingest programs, each running several batch writers, ingest would eventually become slow. Testing (attached) proved that performance fell off as the number of threads increased.

      Attachments

        1. SlamTest.java
          2 kB
          Eric C. Newton

        Issue Links

          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. ACCUMULO-893 splitting and hold time are interacting badly

          • Major - Major loss of function.
          • Resolved

          Activity

            People

              ecn Eric C. Newton
              ecn Eric C. Newton
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              Dates

                Created:
                Updated:
                Resolved: