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Posted to commits@druid.apache.org by GitBox <gi...@apache.org> on 2020/02/25 12:48:09 UTC
[GitHub] [druid] suneet-s commented on issue #9321: Performance degradation
in topN queries when SQL-compatible null handling is enabled
suneet-s commented on issue #9321: Performance degradation in topN queries when SQL-compatible null handling is enabled
URL: https://github.com/apache/druid/issues/9321#issuecomment-590849778
interesting finding... Can you profile the setup to see if there are any clues about what is different between before / after running the first group by v2 query.
Some instructions on how to do that - https://support.imply.io/hc/en-us/articles/360033747953-Profiling-Druid-queries-using-flame-graphs
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