70.222: [GC [PSYoungGen: 131072K->15437K(152896K)] 131072K->15509K(502464K), 0.0228420 secs] [Times: user=0.09 sys=0.01, real=0.02 secs]
You can find tutorials on interpreting verbose GC output eg. in:
Looking at verbosegc output tutorial - Java 7, you can see YoungGen space analysis:
UPDATE 03/27/2014: The "Collection time (secs)" is actually a Timestamp showing the when the GC occurred. The Collection times are reported as Times=user=0.45 sys=0.01, real=0.14 secs].
Times=user=0.45 sys=0.01, real=0.14 secs]
Here, the 262208K->137900K(100428K) means Java Heap before GC-> Java Heap after GC (Total Size of the Java Heap).
262208K->137900K(100428K)
Java Heap before GC
Java Heap after GC (Total Size of the Java Heap)
And, OldGen space analysis:
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