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  1. Cassandra
  2. CASSANDRA-15387 Reduce compaction & local read path garbage
  3. CASSANDRA-15393

Add byte array backed cells

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    Details

    • Type: Sub-task
    • Status: Patch Available
    • Priority: Normal
    • Resolution: Unresolved
    • Fix Version/s: 4.0
    • Component/s: Local/Compaction
    • Labels:
      None
    • Change Category:
      Performance
    • Complexity:
      Normal
    • Platform:
      All
    • Impacts:
      None
    • Test and Documentation Plan:
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      Description

      We currently materialize all values as on heap byte buffers. Byte buffers have a fairly high overhead given how frequently they’re used, and on the compaction and local read path we don’t do anything that needs them. Use of byte buffer methods only happens on the coordinator. Using cells that are backed by byte arrays instead in these situations reduces compaction and read garbage up to 22% in many cases.

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          Sub-task - The sub-task of the issue CASSANDRA-15391 Reduce heap footprint of commonly allocated objects

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              • Assignee:
                bdeggleston Blake Eggleston
                Reporter:
                bdeggleston Blake Eggleston
                Authors:
                Blake Eggleston
                Reviewers:
                Benedict Elliott Smith
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                Dates

                • Created:
                  Updated: