JVm Heap memory settings

[nagesh]

Hi,
How to increase the JVm Heap memory maximum size to 512mb.
I am not runnnig any web servers in my machine.Few .jar files are running to connect to Siebel system from the Biztalk server.

Thanks,
nagesh

[Steve11235]

Here is a link to the 1.5 documentation; I can't find the same for 1.6, but I doubt it changed: java sun com/j2se/1.5.0/docs/tooldocs/windows/java.html (I'm not allowed to create links).

The settings I think you are looking for are

-Xmsn
    Specify the initial size, in bytes, of the memory allocation pool. This value must 
be a multiple of 1024 greater than 1MB. Append the letter k or K to indicate 
kilobytes, or m or M to indicate megabytes. The default value is 2MB. 
Examples:

               -Xms6291456
               -Xms6144k
               -Xms6m
               

-Xmxn
    Specify the maximum size, in bytes, of the memory allocation pool. This value
must a multiple of 1024 greater than 2MB. Append the letter k or K to indicate 
kilobytes, or m or M to indicate megabytes. The default value is 64MB. 
Examples:

               -Xmx83886080
               -Xmx81920k
               -Xmx80m

These entries belong in the options,

java -Xmx512m -cp ...

[vogella]

In Java 1.6 the default values are calculated based on the system configuration:

java - the Java application launcher

Best regards, Lars