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https://issues.apache.org/jira/browse/DRILL-4152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15053566#comment-15053566
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ASF GitHub Bot commented on DRILL-4152:
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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 <[email protected]>
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.
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