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  1. HPCC
  2. HPCC-19869

Switch roxie heap back to using non-scanning heap

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 7.0.0
    • Component/s: Roxie
    • Labels:
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      Description

      I am not sure that the scanning heap works very well with large roxie queries at the moment

      • roxie doesn't use unique allocators, so lots of allocators get commoned up
      • roxie has large differences between the sizes of buckets - which means large number of allocators share the same underlying heap.
      • rows are often buffered between subgraphs or in splitters.

      It would be safer to use the linked-list implementation until some of the items above are addressed.

       

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            • Assignee:
              ghalliday Gavin Halliday
              Reporter:
              ghalliday Gavin Halliday
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              • Created:
                Updated:
                Resolved: