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Posted to issues@kudu.apache.org by "ASF subversion and git services (Jira)" <ji...@apache.org> on 2020/09/09 20:22:00 UTC
[jira] [Commented] (KUDU-3140) Add heuristics to disable predicate
evaluation/filtering for Bloom filter predicate
[ https://issues.apache.org/jira/browse/KUDU-3140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17193165#comment-17193165 ]
ASF subversion and git services commented on KUDU-3140:
-------------------------------------------------------
Commit 0c4f1f91e3c1ff57360025731f519324a9550730 in kudu's branch refs/heads/master from Bankim Bhavsar
[ https://gitbox.apache.org/repos/asf?p=kudu.git;h=0c4f1f9 ]
[docs] Remove experimental tag on Bloom filter predicate
Impala now supports pushing down Bloom filter predicate to Kudu,
by default [1].
Performance testing and associated changes were made to Kudu to reduce
regressions when Bloom filter predicate isn't effective [2].
So removing the experimental tag from the C++ client API docs.
[1] https://issues.apache.org/jira/browse/IMPALA-3741
[2] https://issues.apache.org/jira/browse/KUDU-3140
Change-Id: I1b87ed5b959de70ab587c1e86eb92a7a84091ce9
Reviewed-on: http://gerrit.cloudera.org:8080/16427
Reviewed-by: Attila Bukor <ab...@apache.org>
Reviewed-by: Alexey Serbin <as...@cloudera.com>
Tested-by: Bankim Bhavsar <ba...@cloudera.com>
> Add heuristics to disable predicate evaluation/filtering for Bloom filter predicate
> -----------------------------------------------------------------------------------
>
> Key: KUDU-3140
> URL: https://issues.apache.org/jira/browse/KUDU-3140
> Project: Kudu
> Issue Type: Improvement
> Components: perf, util
> Affects Versions: 1.12.0
> Reporter: Bankim Bhavsar
> Assignee: Bankim Bhavsar
> Priority: Major
> Fix For: 1.13.0
>
>
> KUDU-2483 introduced support for Bloom filter predicate.
> However as observed with TPCH, query 9 exhibits regression when Bloom filter predicates are pushed down to kudu.
> See excerpt from performance analysis of TPCH run by [~wzhou].
> https://gist.github.com/bbhavsar/811ccbe0cd144090f82bdabcd801f827
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