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From "Mohit Gupta" <>
Subject Tomcat Tuning Memory leak
Date Tue, 30 Dec 2003 10:44:55 GMT

Hi All

I am working on Tomcat 4.1.24 on Solatis-8, 12 CPU, 24GB RAM Machine. I am using Apache 2.0.43
and the Jdk version is 1.4.1_02.

When I start my server then after 5-6 hours my server becomes very slow and then I need to
restart my server. I am taking the top stats for the tomcat and have found that normally the
thread remains between 100- 140 but when the system crashes it reaches to 372 and the memory
gradually increases from 256 to some where around 660. The top stats are as follows

 13082 root     115   0    0  653M  578M cpu/290 313:31 37.64% java
 13082 root     139   7    0  654M  579M cpu/291 388:08 40.78% java
 13082 root     143   0    0  654M  580M cpu/419 466:39 41.43% java
 13082 root     374   1    0  662M  589M cpu/323 547:47 47.03% java
 13082 root     374  10    0  662M  589M cpu/291 625:42 53.59% java

 Here the Thread count increases from 143 to 374 in just 10 min. Even though the no of user
accessing this site has decreased. I really don’t know what the problem is...
 I have set the Catalina Option as "-Xms128M -Xmx512M" but even setting the value of -XMx1024
doesn't solved my problem.

 The connector settings in my server.xml are as follows

 <Connector className="org.apache.coyote.tomcat4.CoyoteConnector" acceptCount="5" bufferSize="2048"
connectionTimeout="20000" debug="0" disableUploadTimeout="false" enableLookups="false" maxProcessors="350"
minProcessors="5" port="8009" protocolHandlerClassName="org.apache.jk.server.JkCoyoteHandler"
proxyPort="0" redirectPort="8443" scheme="http" secure="false" tcpNoDelay="true" useURIValidationHack="false">
 <Factory className=""/>

 Please tell me what is the problem with my configuration. 
 Please help me

 Thanks & Regards

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