XiDuo You created SPARK-38406:
---------------------------------
Summary: Improve perfermance of ShufflePartitionsUtil
createSkewPartitionSpecs
Key: SPARK-38406
URL: https://issues.apache.org/jira/browse/SPARK-38406
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.3.0
Reporter: XiDuo You
If shuffle is skewed with tens of thousands of map partitions and reduce
partitions in AQE, the method `ShufflePartitionsUtil#createSkewPartitionSpecs`
will be very slow. More unfortunately, it is running at driver side.
See the Flame Graph of my local test env:
!image-2022-03-03-20-24-48-244.png!
We can see, a lot of cpu is running for build seq.
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
