GC

https://wiki.openjdk.java.net/display/HotSpot/Main

http://techblog.netflix.com/2013/05/garbage-collection-visualization.html

https://blogs.oracle.com/jonthecollector/entry/our_collectors

http://rednaxelafx.iteye.com/blog/1044951

http://hllvm.group.iteye.com/group/topic/39376

http://www.ps.uni-saarland.de/courses/gc-ws01/slides/copying_gc.pdf

https://blogs.oracle.com/poonam/entry/understanding_cms_gc_logs