[jboss-user] [Performance Tuning] - AJP Connector currentThreadCount stays at maximum

konami do-not-reply at jboss.com
Thu Dec 4 00:13:46 EST 2008

Hi Experts,

I am not sure whether this has performance impact as the currentThreadCount for AJP connector never drops and stays at maximum. We use Apache in front of JBoss together with AJP connector and mod_proxy. The value I am checking is from Jboss web-console->System-> JBoss.web> ajp-{hostname}-8009. Here's corresponding configuration in server.xml file 

<Connector port="8009" address="${jboss.bind.address}" protocol="AJP/1.3"
  |          emptySessionPath="true" enableLookups="false" redirectPort="8443"
  |         minSpareThreads="5" maxThreads="256" maxSpareThreads="20" connectionTimeout="20000"/>

and Apache Configuration 

<IfModule prefork.c>
  | StartServers       8
  | MinSpareServers    5
  | MaxSpareServers   20
  | ServerLimit      256
  | MaxClients       256
  | MaxRequestsPerChild  4000
  | </IfModule>

And the server version and environment:
Version: 4.2.3.GA (build: SVNTag=JBoss_4_2_3_GA date=200807181418)
Version Name: Trinity
Built on: July 18 2008
OS: Linux 2.6.18-92.1.10.el5xen (amd64)

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