[SPARK-5112] Expose SizeEstimator as a developer API

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.4.0
• Component/s: Spark Core
• Assignee: Sandy Ryza
• Reporter: Sandy Ryza
• Created: 06/Jan/15 19:49
• Updated: 09/May/15 09:06
• Resolved: 05/May/15 11:39

Description

"The best way to size the amount of memory consumption your dataset will require is to create an RDD, put it into cache, and look at the SparkContext logs on your driver program. The logs will tell you how much memory each partition is consuming, which you can aggregate to get the total size of the RDD."
-the Tuning Spark page

This is a pain. It would be much nicer to expose simply functionality for understanding the memory footprint of a Java object.

Issue Links

• links to: [Github] Pull Request #3913 (sryza)