Aman Sinha created DRILL-4857:
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Summary: When no partition pruning occurs with metadata caching
there's a performance regression
Key: DRILL-4857
URL: https://issues.apache.org/jira/browse/DRILL-4857
Project: Apache Drill
Issue Type: Bug
Components: Metadata, Query Planning & Optimization
Affects Versions: 1.7.0
Reporter: Aman Sinha
Assignee: Aman Sinha
Fix For: 1.8.0
After DRILL-4530, we see the (expected) performance improvements in planning
time with metadata cache for cases where partition pruning got applied.
However, in cases where it did not get applied and for sufficiently large
number of files (tested with up to 400K files), there's performance
regression. Part of this was addressed by DRILL-4846. This JIRA is to track
some remaining fixes to address the regression.
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