title: Java GC log analysis
body: <p>I am new to gc log.</p>
  
  <p>What is the meaning of the following gc log. Does it imply some useful information?</p>
  
  <pre><code>16960.890: [GC [PSYoungGen: 111960K-&gt;36400K(523584K)] 845053K-&gt;770190K(1286720K), 0.0270419 secs] [Times: user=0.13 sys=0.00, real=0.03 secs] 
  16960.917: [Full GC (System) [PSYoungGen: 36400K-&gt;0K(523584K)] [PSOldGen: 733789K-&gt;714479K(763136K)] 770190K-&gt;714479K(1286720K) [PSPermGen: 34154K-&gt;34154K(38208K)], 1.0982179 secs] [Times: user=1.09 sys=0.00, real=1.09 secs] 
  </code></pre>
  
  <p>what does PSYoundGen  mean? what does the Full GC line mean? i search it in google ,but does not understand it clearly.
  thanks for the reply!</p>