JVM定制改进 @ 淘宝.pdf

文档介绍：Kris Mok, Software Engineer, Taobao
***@rednaxelafx
莫枢/“撒迦”
JVM @ Taobao
Agenda
Customization
Tuning
JVM @ Taobao
Open Source
Training
INTRODUCTION
Java Strengths
• Good abstraction
• Good performance
• Good tooling (IDE, profiler, etc.)
• Easy to recruit good programmers
Java Weaknesses
• Tension between “abstraction leak” and
performance
– Abstraction and performance don’t always
come together
• More control/info over GC and object
overhead wanted sometimes
Our Team
• Domain-puting Team
– performance- and efficency-oriented
– specific solutions to specific problems
– do the low-level plumbing to leverage new
technologies
– we’re hiring!
Our Team (cont.)
• Current Focus
– JVM-level customization/tuning
• based on HotSpot Express 20 from OpenJDK
– pression card integration with
Hadoop
JVM CUSTOMIZATION
@ TAOBAO
Themes
• Performance
• Monitoring/Diagnostics
• Stability