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Posted to issues@impala.apache.org by "Tim Armstrong (JIRA)" <ji...@apache.org> on 2018/05/30 23:20:00 UTC

[jira] [Created] (IMPALA-7095) Improve scanner thread counters in HDFS and Kudu scans

Tim Armstrong created IMPALA-7095:
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             Summary: Improve scanner thread counters in HDFS and Kudu scans
                 Key: IMPALA-7095
                 URL: https://issues.apache.org/jira/browse/IMPALA-7095
             Project: IMPALA
          Issue Type: Bug
          Components: Backend
    Affects Versions: Impala 3.0
            Reporter: Tim Armstrong
            Assignee: Tim Armstrong


There are a few deficiencies here:
* We don't track the peak number of scanner threads. Consumers of the profile often confuse NumScannerThreadsStarted with the peak.
* Kudu scans are missing some metrics, e.g. AverageScannerThreadConcurrency. We should make sure that Kudu and HDFS are consistent.

We should clean this up, and maybe refactor the code so that less logic is duplicated



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