java Programming Glossary: psyounggen

What does “GC--” mean in a java garbage collection log?

http://stackoverflow.com/questions/1174976/what-does-gc-mean-in-a-java-garbage-collection-log

I got these kind of lines in my gc output 44871.602 GC PSYoungGen 342848K 342848K 345600K 961401K 1041877K 1044672K 0.1018780..

How can I see which garbage collector java is using

http://stackoverflow.com/questions/2498942/how-can-i-see-which-garbage-collector-java-is-using

XX PrintGCTimeStamps and the output showed 41359.597 GC PSYoungGen 90499K 32K 377344K 268466K 181862K 2474496K 0.0183138 secs 41359.615.. 268466K 181862K 2474496K 0.0183138 secs 41359.615 Full GC PSYoungGen 32K 0K 377344K PSOldGen 181830K 129760K 2097152K 181862K 129760K..

Java Garbage Collection Log messages

http://stackoverflow.com/questions/895444/java-garbage-collection-log-messages

which cite sun documentation. My questions are What does PSYoungGen refer to I assume it has something to do with the previous younger.. the second triplet of numbers and the first Why is a name PSYoungGen specified for the first triplet of numbers but not the second.. Why would we require a second set of numbers 8109.128 GC PSYoungGen 109884K 14201K 139904K 691015K 595332K 1119040K 0.0454530 secs..