Re: heap size

[joseph lam]

Is there a rule-of-thumb for setting the heap size based on how many 
concurrent Tomcat processors/threads? Mine are mostly basic jsps and 
servlets generating HTML. As I'll be running several Tomcat instances 
for different apps, I need to allocate my 512M RAM to each Tomcat.

Joseph

Shapira, Yoav wrote:

Howdy,

 

Yoav - Where do you specify heap size? I understand it is a parameter
   

of
 

the java command, but is in a Tomcat startup script somewhere? Or do I
   

just
 

execute it at the command line?
   

Add 
JAVA_OPTS='-Xmx512m'
to 
$CATALINA_HOME/bin/catalina.sh
on unix.  On windows, you can do this with a JAVA_OPTS environment
variable, or (if running as a service) via the registry.  Search this
list's archives for more information.

The 512m above specifies a maximum heap of 512 MB.  Run java -X to see
other options.
Yoav Shapira 



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