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  1. IMPALA
  2. IMPALA-8537

Negative values reported for tmp-file-mgr.scratch-space-bytes-used under heavy spilling load

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Details

    • Bug
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • Impala 3.3.0
    • Impala 3.3.0
    • Backend
    • None
    • ghx-label-3

    Description

      I'm running a workload that does a lot of spilling and noticed the value reported for tmp-file-mgr.scratch-space-bytes-used is negative on all nodes.

      Some details of the workload and cluster configuration:

      • Generating a 10 TB TPC-DS partitioned parquet data set (very large sort).
      • 30 impalads, each with 48 GB RAM and 14 scratch directories (each on a separate drive)
      • Rough estimate (based on query metrics) of total cumulative aggregate memory spilled across the cluster since restart is 6.5 TB.

      Snapshot of the bad metrics attached.

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        is broken by

        Sub-task - The sub-task of the issue IMPALA-8375 Add metrics for spill disk usage

        • Major - Major loss of function.
        • Closed

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          People

            arawat Abhishek Rawat
            drorke David Rorke
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