JVm Heap memory settings

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

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

Code:

---

-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 ...

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

java - the Java application launcher

Best regards, Lars