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Posted to issues@spark.apache.org by "Mark Hamstra (JIRA)" <ji...@apache.org> on 2019/05/15 18:22:00 UTC
[jira] [Commented] (SPARK-27726) Performance of InMemoryStore
suffers under load
[ https://issues.apache.org/jira/browse/SPARK-27726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16840636#comment-16840636 ]
Mark Hamstra commented on SPARK-27726:
--------------------------------------
[~vanzin]
> Performance of InMemoryStore suffers under load
> -----------------------------------------------
>
> Key: SPARK-27726
> URL: https://issues.apache.org/jira/browse/SPARK-27726
> Project: Spark
> Issue Type: Umbrella
> Components: Spark Core
> Affects Versions: 2.3.3
> Reporter: David C Navas
> Priority: Major
> Attachments: GCRateIssues.pdf, PerformanceBeforeAndAfter.pdf
>
>
> When our Spark system has been under load for an extended period of time, GC remains highly active and the jobs page becomes unresponsive even when load eases. Please see the attached GCRateIssues for more details regarding the problem definition.
> We found a number of separate issues which are detailed in the subtasks. I anticipate committing a single PR for all subtasks whose commits roughly align with the descriptions in the subtasks.
> The performance of the code is measured before and after the change and is attached in the document PerformanceBeforeAndAfter. tl;dr in our use case, we saw about five (computed) orders of magnitude improvement.
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