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  1. Apache Jena
  2. JENA-1832

Increase default JVM heap setting.

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    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major
    • Resolution: Done
    • Affects Version/s: Jena 3.14.0
    • Fix Version/s: Jena 3.15.0
    • Component/s: Fuseki
    • Labels:
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      Description

      The script default is -Xmx1200M which is quite small these days (we can ignore 32-bit setups in choosing defaults).

      We could simply leave it to the JVM default (25% of RAM).

      Considerations:

      • we don't want to squeeze out memory mapped files.
      • 25% is a lot on larger servers if shared.

      For TDB1/TDB2, a key use of memory in heap is the node table cache.
      Other than that, it is intermediate query processing space.

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            • Assignee:
              andy Andy Seaborne
              Reporter:
              andy Andy Seaborne

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