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https://issues.apache.org/jira/browse/KUDU-2162?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas D'Silva updated KUDU-2162:
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Code Review: http://gerrit.cloudera.org:8080/14652 (was:
ttp://gerrit.cloudera.org:8080/14652)
> Expose stats about scan filters
> -------------------------------
>
> Key: KUDU-2162
> URL: https://issues.apache.org/jira/browse/KUDU-2162
> Project: Kudu
> Issue Type: Improvement
> Components: client
> Reporter: Thomas Tauber-Marshall
> Assignee: Thomas D'Silva
> Priority: Major
>
> Impala is working on implementing runtime filters that get pushed down into
> Kudu using KuduScanner::AddConjunctPredicate()
> It would be useful for perf analysis and debugging to be able to include info
> in Impala's runtime profile about the effectiveness of the filters, eg.
> number of rows that are filtered.
> This would probably require at least two counters:
> - # of blocks that are entirely skipped
> - # of rows that are filtered from blocks that aren't entirely skipped
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