Re: Tomcat shutdown script initiates Heap dump collection

2009-01-22 Thread Prakash Nathan1

Hi Andre

I could not execute the following in my production server
echo catalina.sh : JAVA_OPTS = $JAVA_OPTS  /var/log/tomcat_debug_file.log

Here is how I start the tomcat services
/opt/app/tomcat/public1/bin/startup.sh

I was checking all the file the startup.sh uses

startup.sh includes catalina.sh
catalina.sh includes setenv.sh and setclasspath.sh

However, I dont see any JAVA_OPTS parameter defined. 
I believe, this is a optional parameter and it is not defined in our
environment. your views ?

Could you please let me know the relation between JAVA_OPTS and the heap
dump collection?

Thanks
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maxKeepAliveRequests attribute configuration

2009-01-18 Thread Prakash Nathan1

Hello

We are planning to define the maxKeepAliveRequests attribute in Tomcat
server.xml

As of now, this attribute is not defined and I believe the default value is
100.

What is the preferred value to configure? please advise.


Here are the environment details

Apache Tomcat/4.1.27

JVM/JDK: 1.4.2_06

Platform:
OS Red Hat Enterprise Linux AS release 3 (Taroon Update 5) 

The reason for the definition of the attribute is because we encounter high
socket connection issues 
and we suspect improper HTTP Keep alive configuration could be the root
cause.

Please let me know if you need more details.

Thanks
Prakash

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RE: Tomcat shutdown script initiates Heap dump collection

2009-01-14 Thread Prakash Nathan1

Hi Chuck

In catalina.sh file, I could see that JAVA_OPTS and CATALINA_OPTS are
being referenced as follows..

exec $_RUNJDB $JAVA_OPTS $CATALINA_OPTS \...

However, the value for JAVA_OPTS is not defined in catalina.sh

As I had already mentioned, ONLY CATALINA_OPTS are defined in setenv.sh
CATALINA_OPTS='-Xms512M -Xmx1536M'

Where can I find the values configured for JAVA_OPTS ?

Please guide. Thanks
Prakash
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RE: Tomcat shutdown script initiates Heap dump collection

2009-01-13 Thread Prakash Nathan1

Thanks Chuck

Here are the environment details

Apache Tomcat/4.1.27

JVM/JDK: 1.4.2_06

Platform:
OS Red Hat Enterprise Linux AS release 3 (Taroon Update 5)

Where Can I get the JVM setting configured for running Tomcat?

Are you refering to setenv.sh ?
CATALINA_OPTS='-Xms512M -Xmx1536M

Please let me know. Thanks

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Tomcat shutdown script initiates Heap dump collection

2009-01-12 Thread Prakash Nathan1

Hello 

It is observed that when ever we initiate tomcat shutdown script, Heap Dumps
are collected in catalina.out log file.

1. Is this a normal behavior ? Will it have any impacts on performance ?
2. Could you please let us know the configuration which triggers the heap
dump collection ?

Thanks
Prakash

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