measure amount of memory used by java program 02-09-2015d1005

2015-03-02

Measure amount of memory used by java program
measure amount of ram used by java program

this forum page has some good info
http://stackoverflow.com/questions/74674/how-to-do-i-check-cpu-and-memory-usage-in-java

this page looks useful
http://www.inoneo.com/en/blog/9/java/get-the-jvm-peak-memory-usage
-I had to modify their code a little bit to get it to work, but it looks pretty useful.  Also, I don't know what all of the different types of memory mean, but I guess I could monitor them all.
--What are the units of the memory values given here?
{
	    // Place this code just before the end of the program
	    try {
	        String memoryUsage = new String();
	        List pools = ManagementFactory.getMemoryPoolMXBeans();
	        for (int i=0; i<pools.size(); i++) {
	            MemoryPoolMXBean pool = (MemoryPoolMXBean)pools.get(i);
	        	MemoryUsage peak = pool.getPeakUsage();
	            memoryUsage += String.format("Peak %s memory used: %,d%n", pool.getName(),peak.getUsed());
	            memoryUsage += String.format("Peak %s memory reserved: %,d%n", pool.getName(), peak.getCommitted());
	        }

// we print the result in the console
	        System.out.println(memoryUsage);
	 
	   } catch (Throwable t) {
	        System.err.println("Exception in agent: " + t);
	   }
}

azim58wiki: