It's almost certainly your application. I would start with findbugs
http://findbugs.sourceforge.net/ And if it doesn't help you sort it out, look at an application profiler. I run about 40 virtual hosts, with a fairly complex calendar app, that gets 10s of thousands of hits per day, on a PIII 500, and the utilization is around 5-10% during the day. George Sexton MH Software, Inc. http://www.mhsoftware.com/ Voice: 303 438 9585 > -----Original Message----- > From: BATCHELOR, SCOTT (CONTRACTOR) [mailto:[EMAIL PROTECTED] > Sent: Thursday, June 02, 2005 8:52 AM > To: tomcat-user@jakarta.apache.org > Subject: Poor Performance Tomcat5.5.7, Apache2.0.52, Solaris 9 > > I am hoping someone has experienced this before. > > The installation is a binary install of Tomcat and a binary > install of mod_jk 1.2.6 connector. > > We have been running performance tests on this install and > Tomcat is very, very cpu intensive topping out at 55% of the > cpu's on the box. I have never experienced this before and I > am having a hard time tracking down the problem. The > application does lookups and updates to an Oracle 9i database > and it does use its own homegrown connection pool. But the > poor performance seems to be on the web side with server > threads climbing up into the four hundreds at times. > > I am including portions of my config files hoping that > someone will spot something that I am doing wrong. > > Httpd.conf: > > Timeout 300 > KeepAlive On > MaxKeepAliveRequests 500 > KeepAliveTimeout 15 > StartServers 2 > MaxClients 400 > MinSpareThreads 150 > MaxSpareThreads 300 > ThreadsPerChild 25 > MaxRequestsPerChild 10000 > AcceptMutex fcntl > > Tomcat Server.xml: > > <!-- Define an AJP 1.3 Connector on port 8009 --> > <Connector port="8011" > enableLookups="false" redirectPort="8443" > protocol="AJP/1.3" > maxThreads="500" minSpareThreads="75" > maxSpareThreads="250"/> > > <Host name="localhost" appBase="webapps" > unpackWARs="true" autoDeploy="true" > xmlValidation="false" xmlNamespaceAware="false"> > > Tomcat workers.properties: > > worker.ajp13w.type=ajp13 > worker.ajp13w.host=somehost > worker.ajp13w.port=8011 > worker.ajp13w.cachesize=600 > worker.ajp13w.cache_timeout=600 > > Can someone tell the correlation of the worker.cachesize and > an htptd.conf directive? > > Thanks in advance. > > -SB > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
