1、http://www.iteye.com/topic/1112480
2、http://www.blogjava.net/justinchen/archive/2009/03/19/254144.html
3、http://stackoverflow.com/questions/6871213/is-there-a-cookbook-guide-for-gc-problems
4、http://stackoverflow.com/questions/1839599/analyze-gc-logs-for-sun-hotspots-jvm-6
5、http://stackoverflow.com/questions/895444/java-garbage-collection-log-messages
6、http://stackoverflow.com/questions/541832/know-of-any-java-garbage-collection-log-analysis-tools
7、http://wiki.zimbra.com/index.php?title=When%5Fto%5FTurn%5FOn%5FVerbose%5FGC
8、http://stackoverflow.com/questions/895444/java-garbage-collection-log-messages
9、http://stackoverflow.com/questions/895444/java-garbage-collection-log-messages
记录一段不错的话：
Broadly, refactoring is not a means to increase performance, but to improve readability and maintainability of a code base. (Which may then help you make optimizations and architectural changes with more confidence and ease.)
重构一般来说不是为了提高性能，而是提高可读性和可维护型，能够帮助你更容易的进行后期优化和架构修订