[jboss-jira] [JBoss JIRA] (WFLY-1708) Per-deployment web thread pools

Thu Jul 18 00:19:26 EDT 2013

    [ https://issues.jboss.org/browse/WFLY-1708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12790570#comment-12790570 ] 

Stuart Douglas commented on WFLY-1708:
--------------------------------------

I am not sure that attempting to limit further upstream will buy us much. The handler chain before the thread pool dispatch will generally have a very low overhead. Conceptually there are very few differences between a handler that queues requests to limit throughput, and a thread pool with a queue and a fixed number of threads to limit throughput. Limiting upstream will require at the very least a contended CAS, which will add some overhead, as thread pool handoff is needed no matter what it has no additional overhead. 

> Per-deployment web thread pools
> -------------------------------
>
>                 Key: WFLY-1708
>                 URL: https://issues.jboss.org/browse/WFLY-1708
>             Project: WildFly
>          Issue Type: Feature Request
>          Components: Web (Undertow)
>            Reporter: James Livingston
>            Assignee: Stuart Douglas
>
> It would be nice if you could limit the number of worker threads being used by an application, and one way of achieving that would be to add a per-deployment thread pool for handing web requests.
> This can be done currently by configuring one <connector> per application and giving each one it's own thread pool.
> Undertow supports (from cursory inspection) DeploymentInfo.setExecutor/setAsyncExecutor() which configured the Executor to use for requests. The subsystem could read a thread pool configuration from jboss-web.xml and pass the resulting executor into those two methods to make setting this up easier and not require a load balancer.

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