You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@spark.apache.org by "Dongjoon Hyun (Jira)" <ji...@apache.org> on 2020/03/16 22:55:04 UTC
[jira] [Updated] (SPARK-29171) Performance regression in Parquet MR
on scans of 100 columns
[ https://issues.apache.org/jira/browse/SPARK-29171?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dongjoon Hyun updated SPARK-29171:
----------------------------------
Affects Version/s: (was: 3.0.0)
3.1.0
> Performance regression in Parquet MR on scans of 100 columns
> ------------------------------------------------------------
>
> Key: SPARK-29171
> URL: https://issues.apache.org/jira/browse/SPARK-29171
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.1.0
> Reporter: Maxim Gekk
> Priority: Major
>
> The updated benchmark results show performance regression *more than 4 times* in Parquet MR on scanning 100 columns, see [https://github.com/apache/spark/pull/25828/files#diff-e37c3433287c7371ff9c2404db821095R248] . Need to find out the root cause of this and fix it.
> Old results:
> {code}
> Single Column Scan from 100 columns: Best/Avg Time(ms) Rate(M/s) Per Row(ns) Relative
> SQL Parquet MR 275 / 286 3.8 262.3 49.0X
> {code}
> New results:
> {code}
> Single Column Scan from 100 columns: Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
> SQL Parquet MR 1209 1213 5 0.9 1153.1 12.2X
> {code}
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org