Poonam Bajaj's Blog

Collector names for GarbageCollectorMXBean MXBean

Poonam Parhar
Consulting Member of Technical Staff
While trying to use GarbageCollectorMXBean to obtain GC information about a running process, I had to look around to find out the correct name strings for various Garbage Collectors.

This is what I did to obtain an instance of GarbageCollectorMXBean:
  MBeanServer server = ManagementFactory.getPlatformMBeanServer();
GarbageCollectorMXBean bean = ManagementFactory.newPlatformMXBeanProxy(server,
GC_BEAN_NAME, GarbageCollectorMXBean.class);

where GC_BEAN_NAME is the ObjectName for uniquely identifying the MXBean for a garbage collector within an MBeanServer and it is of the form:

    java.lang:type=GarbageCollector,name=collector's name  

Now, what is the correct string for collector's name?

Here are the name strings for various collectors in VM:


You can run a simple java program with different collectors and using the below code snippet, can see the full object names of all the available GarbageCollectorMXBean MXBeans.

MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
Set names = mbs.queryNames(null, null);
System.out.println(names.toString().replace(", ",


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