[ 
https://issues.apache.org/jira/browse/HADOOP-15311?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Erik Krogen updated HADOOP-15311:
---------------------------------
    Attachment: HADOOP-15311.000.patch

> HttpServer2 needs a way to configure the acceptor/selector count
> ----------------------------------------------------------------
>
>                 Key: HADOOP-15311
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15311
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: common
>            Reporter: Erik Krogen
>            Assignee: Erik Krogen
>            Priority: Major
>         Attachments: HADOOP-15311.000.patch
>
>
> HttpServer2 starts up with some number of acceptors and selectors, but only 
> allows for the automatic configuration of these based off of the number of 
> available cores:
> {code:title=org.eclipse.jetty.server.ServerConnector}
> selectors > 0 ? selectors : Math.max(1, Math.min(4, 
> Runtime.getRuntime().availableProcessors() / 2)))
> {code}
> {code:title=org.eclipse.jetty.server.AbstractConnector}
>     if (acceptors < 0) {
>       acceptors = Math.max(1, Math.min(4, cores / 8));
>     }
> {code}
> A thread pool is started of size, at minimum, {{acceptors + selectors + 1}}, 
> so in addition to allowing for a higher tuning value under heavily loaded 
> environments, adding configurability for this enables tuning these values 
> down in resource constrained environments such as a MiniDFSCluster.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

---------------------------------------------------------------------
To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org
For additional commands, e-mail: common-issues-h...@hadoop.apache.org

Reply via email to