Michael Smith has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/24896 )

Change subject: IMPALA-15381: Reduce reservoir RNG state
......................................................................


Patch Set 3:

> Patch Set 3:
>
> > Patch Set 3: Code-Review+1
> >
> > I tried 
> > query_test/test_aggregation.py::TestTPCHAggregationQueries::test_tpch_stress
> >  with this change, and it makes the overall test slightly faster (~1.41s to 
> > ~1.35s).
>
> Hmm, that's probably noise, since the test doesn't use any of the sampling 
> methods.

Maybe HistogramTest.* works as a quick perf check: that goes from 992ms to 
962ms.


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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I9e046e3f0c1b91f1761ce578601a330bd864eb84
Gerrit-Change-Number: 24896
Gerrit-PatchSet: 3
Gerrit-Owner: Aleksandr Efimov <[email protected]>
Gerrit-Reviewer: Aleksandr Efimov <[email protected]>
Gerrit-Reviewer: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Joe McDonnell <[email protected]>
Gerrit-Reviewer: Michael Smith <[email protected]>
Gerrit-Reviewer: Riza Suminto <[email protected]>
Gerrit-Comment-Date: Tue, 22 Sep 2026 15:46:50 +0000
Gerrit-HasComments: No

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