Spark Created 2009 Tasks, But I Only requested for 2000 #databricks #dataengineering
0:46
YouTubeSumit Mittal
Spark Created 2009 Tasks, But I Only requested for 2000 #databricks #dataengineering
Ever noticed this in the Spark UI? You configured 2000 shuffle partitions... but Spark created 2009 tasks! At first, it looks like something went wrong. But this is actually one of Spark's smartest optimizations. Here's what happened: 1999 partitions were around 100 MB 1 partition was nearly 1 GB Instead of letting one huge partition slow down ...
4.3K views2 days ago
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