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Posted to dev@drill.apache.org by "Aman Sinha (JIRA)" <ji...@apache.org> on 2016/08/13 02:19:22 UTC
[jira] [Created] (DRILL-4846) Eliminate extra operations during
metadata cache pruning
Aman Sinha created DRILL-4846:
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Summary: Eliminate extra operations during metadata cache pruning
Key: DRILL-4846
URL: https://issues.apache.org/jira/browse/DRILL-4846
Project: Apache Drill
Issue Type: Bug
Components: Metadata
Affects Versions: 1.7.0
Reporter: Aman Sinha
Assignee: Aman Sinha
Fix For: 1.8.0
While doing performance testing for DRILL-4530 using a new data set and queries, we found two potential performance issues: (a) the metadata cache was being read twice in some cases and (b) the checking for directory modification time was being done twice, once as part of the first phase of directory-based pruning and subsequently after the second phase pruning. This check gets expensive for large number of directories. Creating this JIRA to track fixes for these issues.
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