Min's Engineer Story

http://java.sun.com/javaone/sf/2008/articles/rockstar_tonyprintezis.jsp

먼저 위의 인터뷰 내용을 읽어보자.
Garbage First Collector가 뭔지 대충 감을 잡을 것이다.

분명 대부분 안읽어 보시겠지만....적어도 아래 줄들은 일어 주기 바란다.
G1=next-generation low-pause garbage collector
G1 will ultimately replace the Concurrent Mark-Sweep (CMS) garbage collector
G1, even though it is generational, there is no physical separation between the two generations.

Three Objectives of G1
The first objective is consistent low pauses over time.
The second objective is to avoid, as much as possible, having a full GC.
The final objective is good throughput.


if you care about getting the job done as quickly as possible, and don't care much for how long your application is going to be stopped by the garbage collector, the throughput collector is the best choice.

if you have a batch job that is going to take a few minutes or a few hours and you want it to be done as quickly as possible, then a throughput collector is clearly the best choice.

But, if you are working on a very interactive job that needs to interact with people, other applications, or users through web pages, then a low latency garbage collector is the best choice.


Why does garbage collection take so long? ==> Garbage collection is very memory-bound. And memory speeds these days are quite slow compared to CPU speeds

글 중간에는 다음의 내용을 읽어보라고 이야기한다.
GC와 친해지는 코딩 방법
http://developers.sun.com/learning/javaoneonline/2007/pdf/TS-2906.pdf

그리고, 저 이너뷰 한 사람이 사진을 잘 찍는가본데, 사진과 개발과의 상관관계를 아래와 같이 이야기 했다.
You need to be committed and to be patient and try out things again and again, to make sure that you get it just right. I see some parallels between photography and development.

마지막엔 그가 이야기하는 아름다운 코드란....
Beautiful code is code that is simple, easy to understand, and efficient
란다.

더 자세한 내용을 보시려면 아래의 영어지만, 쉽지 않은 용어로 되어 있는 문서를 참조하기 바란다.
http://research.sun.com/jtech/pubs/04-g1-paper-ismm.pdf

참고로 G1은 JDK 7 부터 추가된단다.
그리고, early access 로 JDK 1.6.1에서 추가 되었다.
http://www.tuning-java.com/272