Java Garbage Collection Strategy

Question

I'm looking for a technique to find out the Garbage Collection (GC) strategy (collector) that Java VM is currently using. (Later, I would like him to correctly reflect the strategy that I chose, say XX:+UseConcMarkSweepGC.)

verbose:gc(in its basic form) does not help, because it just shows me that all this is with every generation. Is there any other flag that I can set to spit out the GC strategy used?

JDK Version - 1.6_21

Answer 1

Mmmm.. , , , JVM jconsole ( VM Summary). , .

EDIT: JVM , jinfo.exe JDK. , , ParallelGC, : jinfo.exe -flag UseParallelGC <PID>.

Answer 2

, JVM, GarbageCollectorMXBean

List<GarbageCollectorMXBean> gcs =
  ManagementFactory.getGarbageCollectorMXBeans();
for (GarbageCollectorMXBean gc : gcs) {
  System.out.println(gc.getName());
}

Answer 3

jinfo, JDK. PID JVM , , JVM. URL- :

http://download.oracle.com/javase/6/docs/technotes/tools/share/jinfo.html

, .

Answer 4

Again, the behavior of the GC may influence, but is not predicted.