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  1. IMPALA
  2. IMPALA-6121

Remove RequestContext cache in DiskIoMgr

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Details

    • Improvement
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • Impala 2.11.0
    • Impala 2.11.0
    • Backend
    • None

    Description

      I'm planning to do some work on the I/O manager buffer management. I think the lifecycle of request contexts is more complex than necessary because of the recycling. That recycling is unlikely to save CPU cycles or improve scalability relative to TCMalloc since the cache is behind a single global lock.

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            tarmstrong Tim Armstrong
            tarmstrong Tim Armstrong
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