title: GC output clarification
body: <p>I'm running a java application with the following settings:<br>
  -XX:+CMSParallelRemarkEnabled<br>
  -XX:+UseConcMarkSweepGC<br>
  -XX:+UseParNewGC<br>
  -XX:+PrintGCApplicationStoppedTime<br>
  -XX:+PrintGCApplicationConcurrentTime<br>
  -XX:+PrintGCDetails<br>
  -XX:+PrintGCTimeStamps<br>
  -XX:+PrintGCDateStamps<br>
  -XX:+PrintHeapAtGC<br>
  -XX:+PrintTenuringDistribution   </p>
  
  <p>I'm not sure how to interpret the related gc logs(below). In particular:</p>
  
  <ul>
  <li><p><strong>Heap after GC invocations=31 (full 3)</strong>: does this mean there were 31 minor GCs, and 3 full GCs ?</p></li>
  <li><p>What triggers the several consecutive lines of <strong>Total time for which the application threads were stopped</strong> and <strong>Application Time</strong> ? Is it possible to get the time stamps associated with each of these lines ? </p></li>
  </ul>
  
  <p>GC logs:</p>
  
  <pre>
  Total time for which application threads were stopped: 0.0046910 seconds  
  Application time: 0.7946670 seconds  
  Total time for which application threads were stopped: 0.0002900 seconds  
  Application time: 1.0153640 seconds  
  Total time for which application threads were stopped: 0.0002780 seconds  
  Application time: 1.0161890 seconds  
  Total time for which application threads were stopped: 0.0002760 seconds  
  Application time: 1.0145990 seconds  
  Total time for which application threads were stopped: 0.0002950 seconds  
  Application time: 0.9999800 seconds  
  Total time for which application threads were stopped: 0.0002770 seconds  
  Application time: 1.0151640 seconds
  Total time for which application threads were stopped: 0.0002730 seconds
  Application time: 0.9996590 seconds  
  Total time for which application threads were stopped: 0.0002880 seconds  
  Application time: 0.9624290 seconds  
  
  {Heap before GC invocations=30 (full 3):  
   par new generation   total 131008K, used 130944K [0x00000000eac00000, 0x00000000f2c00000, 0x00000000f2c00000)  
    eden space 130944K, 100% used [0x00000000eac00000, 0x00000000f2be0000, 0x00000000f2be0000)  
    from space 64K,   0% used [0x00000000f2bf0000, 0x00000000f2bf0000, 0x00000000f2c00000)  
    to   space 64K,   0% used [0x00000000f2be0000, 0x00000000f2be0000, 0x00000000f2bf0000)  
   concurrent mark-sweep generation total 131072K, used 48348K [0x00000000f2c00000, 0x00000000fac00000, 0x00000000fac00000)  
   concurrent-mark-sweep perm gen total 30000K, used 19518K [0x00000000fac00000, 0x00000000fc94c000, 0x0000000100000000)  
  
  2010-05-11T09:30:13.888+0100: 384.955: [GC 384.955: [ParNew  
  Desired survivor size 32768 bytes, new threshold 0 (max 0)  
  : 130944K->0K(131008K), 0.0052470 secs] 179292K->48549K(262080K), 0.0053030 secs] [Times: user=0.00 sys=0.00, real=0.01 secs]  
  
  Heap after GC invocations=31 (full 3):  
   par new generation   total 131008K, used 0K [0x00000000eac00000, 0x00000000f2c00000, 0x00000000f2c00000)  
    eden space 130944K,   0% used [0x00000000eac00000, 0x00000000eac00000,   0x00000000f2be0000)
    from space 64K,   0% used [0x00000000f2be0000, 0x00000000f2be0000, 0x00000000f2bf0000)  
    to   space 64K,   0% used [0x00000000f2bf0000, 0x00000000f2bf0000, 0x00000000f2c00000)  
   concurrent mark-sweep generation total 131072K, used 48549K [0x00000000f2c00000, 0x00000000fac00000, 0x00000000fac00000)  
   concurrent-mark-sweep perm gen total 30000K, used 19518K [0x00000000fac00000, 0x00000000fc94c000, 0x0000000100000000)  
  }
  
  Total time for which application threads were stopped: 0.0056410 seconds  
  Application time: 0.0475220 seconds  
  Total time for which application threads were stopped: 0.0001800 seconds  
  Application time: 1.0174830 seconds  
  Total time for which application threads were stopped: 0.0003820 seconds  
  Application time: 1.0126350 seconds  
  Total time for which application threads were stopped: 0.0002750 seconds  
  Application time: 1.0155910 seconds
  Total time for which application threads were stopped: 0.0002680 seconds
  Application time: 1.0155580 seconds  
  Total time for which application threads were stopped: 0.0002880 seconds  
  Application time: 1.0155480 seconds  
  Total time for which application threads were stopped: 0.0002970 seconds  
  Application time: 0.9896810 seconds  
  </pre>