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Posted to issues@impala.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2017/04/04 01:58:42 UTC

[jira] [Created] (IMPALA-5156) Drop VLOG level passed into Kudu client

Todd Lipcon created IMPALA-5156:
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             Summary: Drop VLOG level passed into Kudu client
                 Key: IMPALA-5156
                 URL: https://issues.apache.org/jira/browse/IMPALA-5156
             Project: IMPALA
          Issue Type: Improvement
          Components: Backend, Perf Investigation
    Affects Versions: Impala 2.8.0
            Reporter: Todd Lipcon


I'm running a concurrent stress workload with lots of small queries. By changing the impalad vlog level from 1 to 0, my QPS went from ~17qps to around 60qps.

We should consider passing FLAGS_v - 1 into Kudu's vlog level, since we generally assume that VLOG=1 is allowed to be relatively noisy (eg logging thread start/stop, etc) whereas it seems like Impala's policy is that VLOG(1) should be fairly quiet.



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