title: Explanation of Tomcat GC log statements
body: <p>Here is a statement from my catalina.out, generated by my tomcat server : </p>
  
  <p>1885.855: [GC [PSYoungGen: 742996K->64359K(761472K)] 2509583K->1832973K(4116928K), 0.1453610 secs] [Times: user=0.31 sys=0.00, real=0.14 secs]  </p>
  
  <p>Could someone explain the meaning of various numbers in here?</p>