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https://issues.apache.org/jira/browse/IMPALA-6311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16486665#comment-16486665
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Mostafa Mokhtar commented on IMPALA-6311:
-----------------------------------------
[~jbapple]
Yes, 75% FPP for a bloom filter is way high.
Increasing the target FPP does make sense.
> Evaluate smaller FPP for Bloom filters
> --------------------------------------
>
> Key: IMPALA-6311
> URL: https://issues.apache.org/jira/browse/IMPALA-6311
> Project: IMPALA
> Issue Type: Task
> Components: Perf Investigation
> Reporter: Jim Apple
> Priority: Major
>
> The Bloom filters are created by estimating the NDV and then using the FPP of
> 75% to get the right size for the filter. This is may be too high to be very
> useful - if our filters are currently filtering more than 75% out, then it is
> only because we are overestimating NDV.
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