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ASF GitHub Bot commented on DRILL-4152: --------------------------------------- GitHub user parthchandra opened a pull request: https://github.com/apache/drill/pull/298 DRILL-4152: Add trace logging to Parquet reader for performance tuning. Added trace level logging to track time taken by the Parquet reader. You can merge this pull request into a Git repository by running: $ git pull https://github.com/parthchandra/incubator-drill DRILL-4152 Alternatively you can review and apply these changes as the patch at: https://github.com/apache/drill/pull/298.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #298 ---- commit edb772e4e7c1a1af325c2ae3da659dbf0b0c26a4 Author: Parth Chandra <par...@apache.org> Date: 2015-12-03T22:32:30Z DRILL-4152: Add trace logging to Parquet reader for performance tuning. ---- > Add additional logging and metrics to the Parquet reader > -------------------------------------------------------- > > Key: DRILL-4152 > URL: https://issues.apache.org/jira/browse/DRILL-4152 > Project: Apache Drill > Issue Type: Bug > Components: Storage - Parquet > Reporter: Parth Chandra > Assignee: Parth Chandra > > In some cases, we see the Parquet reader as the bottleneck in reading from > the file system. RWSpeedTest is able to read 10x faster than the Parquet > reader so reading from disk is not the issue. This issue is to add more > instrumentation to the Parquet reader so speed bottlenecks can be better > diagnosed. -- This message was sent by Atlassian JIRA (v6.3.4#6332)