about increasing heap size of JVM

Question

i have developed chatting application using threads. but when i start my application system acts very slow and sometime exception occur that heap is full. i want to increase heap size of Java Virtual Machine. how can i do it?

Answer 1

Just increase the heap size of the JVM. All Java applications, even simple ones, consume a lot of memory. Take a look at this article explaining in detail how to increase the amount of memory available for your application; basically you'll need to pass a couple of extra parameters to the JVM when you invoke the java command, like this:

java -Xms64m -Xmx256m HelloWorld

In the above command, I'm saying that the HelloWorld program should have an initial heap size of 64MB and a maximum of 256MB. Try with these values and fiddle a bit with them until you find a combination of values that works for your application.