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  1. IMPALA
  2. IMPALA-4835

HDFS scans should operate with a constrained number of I/O buffers

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      The HDFS scan nodes should be able to operate with a fixed number of I/O buffers in most cases (excluding very large rows). We should modify them to claim a reservation upfront and use this for all disk I/O.

      This probably also requires switching DiskIoMgr to allocate memory from BufferPool.

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              • Assignee:
                tarmstrong Tim Armstrong
                Reporter:
                tarmstrong Tim Armstrong
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