How can I read the output provided in a typical garbage collection log?

Issue

• How can I read the data typically provided in a garbage collection log? For example, what does the following output mean:

13-06-18T21:20:47.491+0530: 173.558: [Full GC [PSYoungGen: 32368K->0K(113152K)] [PSOldGen: 275418K->287200K(349568K)] 307786K->287200K(462720K) [PSPermGen: 67827K->67589K(111872K)], 0.8562287 secs] [Times: user=0.77 sys=0.06, real=0.86 secs]