[jboss-jira] [JBoss JIRA] (JBRULES-3663) Use a common thread pool for all TimerJobInstances

[Mark Proctor (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-3663?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mark Proctor updated JBRULES-3663:
----------------------------------

    Fix Version/s: 6.0.0.Alpha1

    
> Use a common thread pool for all TimerJobInstances
> --------------------------------------------------
>
>                 Key: JBRULES-3663
>                 URL: https://issues.jboss.org/browse/JBRULES-3663
>             Project: Drools
>          Issue Type: Enhancement
>      Security Level: Public(Everyone can see) 
>            Reporter: Sebastian Calbaza
>            Assignee: Edson Tirelli
>             Fix For: 6.0.0.Alpha1
>
>
> From what I've seen(correct me if I'm wrong) there is, for each StatefulKnowledgeSession a TimeManager -> JDKTimerService  instances pair that use a ScheduledThreadPoolExecutor of size one(default) for scheduling timer job instances.
> Now the issues that I see are:
>   * not optimal resource utilization in case of large number of sessions 
>   * number of sessions bounded by available memory for threads
>   * some performance penalty for concurrent jobs (I say some because all session ops are serial)
> I provided also a PR with to be reviewed

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