Coding and testing are often considered separate areas of expertise. In this comprehensive guide, author and Java expert Scott Oaks takes the approach that anyone who works with Java should be equally adept at understanding how code behaves in the JVM, as well as the tunings likely to help its performance.
You’ll gain in-depth knowledge of Java application performance, using th...
Coding and testing are often considered separate areas of expertise. In this comprehensive guide, author and Java expert Scott Oaks takes the approach that anyone who works with Java should be equally adept at understanding how code behaves in the JVM, as well as the tunings likely to help its performance.
You’ll gain in-depth knowledge of Java application performance, using the Java Virtual Machine (JVM) and the Java platform, including the language and API. Developers and performance engineers alike will learn a variety of features, tools, and processes for improving the way Java 7 and 8 applications perform.
Apply four principles for obtaining the best results from performance testing
Use JDK tools to collect data on how a Java application is performing
Understand the advantages and disadvantages of using a JIT compiler
Tune JVM garbage collectors to affect programs as little as possible
Use techniques to manage heap memory and JVM native memory
Maximize Java threading and synchronization performance features
Tackle performance issues in Java EE and Java SE APIs
Scott Oaks is an architect at Oracle Corporation, where he works on the performance of Oracle’s middleware software. Prior to joining Oracle, he worked for years at Sun Microsystems, specializing in many disparate technologies from the SunOS kernel to network programming and RPCs to windows systems and the OPEN LOOK Virtual Window Manager. In 1996, Scott became a Java evangelis...
Scott Oaks is an architect at Oracle Corporation, where he works on the performance of Oracle’s middleware software. Prior to joining Oracle, he worked for years at Sun Microsystems, specializing in many disparate technologies from the SunOS kernel to network programming and RPCs to windows systems and the OPEN LOOK Virtual Window Manager. In 1996, Scott became a Java evangelist for Sun and in 2001 joined their Java Performance group--which has been his primary focus ever since. Scott also authored O’Reilly’s Java Security, Java Threads, JXTA in a Nutshell, and Jini in a Nutshell titles.
Performance analysis is all about visibility—knowing what is going on inside of an application, and in the application’s environment. Visibility is all about tools. And so performance tuning is all about tools. (查看原文)
Compiler Flags Are Different
Unlike most Java flags, the flags to select a compiler are different: most of them do not use -XX. The standard compiler flags are simple words: -client, -server, or -d64.
The exception here is tiered compilation, which is enabled with a flag in the common format: -XX:+TieredCompilation. Tiered compilation implies that the server compiler must be used. The following command silently turns off tiered compilation, because it conflicts with the choice of the client compiler:
% java -client -XX:+TieredCompilation other_args (查看原文)
Yano
人民邮电出版社2016版
涅瓦纳
人民邮电出版社2016版
0 有用 eleven 2022-08-11 14:36:01
从编译器到GC，从内存管理到Java API，点线面结合，搭建了一个比较清晰的Java应用性能调优框架
0 有用 octopusthu 2022-09-26 16:39:24 北京
粗看了一遍。有时间值得精读，或者作为工具书查阅。
1 有用 ϱ 2020-04-24 23:08:56
java性能权威指南的第二版，增加了对graal编译器的介绍，Shenandoah gc，epsilon gc和zgc的简单介绍，比较全面讨论了compact string和g1的string dedup，cds简单介绍。总的来说新增的内容挺少的，新增内容大部分比较浅...
1 有用 Sarkar 2021-11-30 16:51:05
O'Reilly 在线读完的，受益匪浅