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https://issues.apache.org/jira/browse/AURORA-117?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joe Smith updated AURORA-117:
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    Labels: O1  (was: O2)

> Scheduler performance issues with very large jobs
> -------------------------------------------------
>
>                 Key: AURORA-117
>                 URL: https://issues.apache.org/jira/browse/AURORA-117
>             Project: Aurora
>          Issue Type: Task
>          Components: Reliability, Scheduler
>            Reporter: Bill Farner
>              Labels: O1
>
> The scheduler tends to have performance issues when scheduling very large 
> jobs.  We've observed this with jobs exceeding 2000 instances.  The 
> {{TaskScheduler}} thread tends to consume a large amount of CPU (100%, 
> limited by the global storage lock).  Current hypothesis is that the majority 
> of the time is spent satisfying diversity constraints (rack, machine), which 
> require expensive queries.



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