JProfiler Get rid of your performance problems and memory leaks! Modern Garbage Collection Tuning Java Performance Training Courses COURSES AVAILABLE NOW. We can provide training courses to handle all your Java performance needs Java Performance Tuning, 2nd ed The classic and most comprehensive book on tuning Java Java Performance Tuning Newsletter Your source of Java performance news. Subscribe now! Enter email: Training online Threading Essentials course JProfiler Get rid of your performance problems and memory leaks!

Back to newsletter 129 contents

Java 7 was released with a JIT compiler bug. This should not be an issue for the Java performance community - if you have a performance problem, you haven't been waiting for Java 7 to fix it for you, you've been busy analysing and fixing it yourself; and if you don't have any performance problems, you aren't about to upgrade your productions systems to Java 7 on the very first release!

A note from this newsletter's sponsor

What we Java performance bods can now do though, with Java 7 now fully out, is start to see which features and options are useful. There are some interesting things in there: Sockets direct protocol, asynchronous file handling, the G1 collector, ... (see the release notes for more details). If you've been a reader of our newsletter then you've already read about many of the new features, but I'm sure some other interesting new things will get identified now the new JVM is out there and used by lots more people. Of course you can read all about anything useful for performance in our future newsletters.

So on with this month's newsletter and all our usual Java performance tools, news, and article links. We also have a new cartoon over at fasterj.com Sizing the generations is the most important tuning option, and, as usual, all the extracted tips from all of this month's referenced articles. Usually, one or two of the extracted tips leap out as gems which I highlight in the RSS feed, but this month there is a host of fabulous tips - enjoy!

A note from this newsletter's sponsor

News

Java performance tuning related news.

• the Chaos Monkey approach to fails-safety
• Java 7 new features
• Anecdotal high-frequency trading. Seems like any language will do as long as it compiles

Tools

Java performance tuning related tools.

• A collection of Concurrent and Highly Scalable Utilities
• Use Back-of-the-envelope Calculations to Evaluate Different Designs
• Continually Test by Failing Servers with Chaos Monkey

A note from this newsletter's sponsor

Articles

• Proposed change to the GC efficiency calculation (Kirk Pepperdine/kodewerks)
• Memory Usage of Maps (Dr. Heinz M. Kabutz/The Java Specialists' Newsletter)
• How Garbage Collection Differs in the Three Big JVMs (Michael Kopp/JDJ)
• Garbage collection in WebSphere Application Server V8, Part 2: Balanced garbage collection as a new option (Ryan Sciampacone, Peter Burka, Aleksandar Micic/IBM)
• Scalability Rules: 50 Principles for Scaling Web Sites (Martin L. Abbott, Michael T. Fisher/informIT)
• Fork and Join: Java Can Excel at Painless Parallel Programming Too! (Julien Ponge/Oracle)

Jack Shirazi

Back to newsletter 129 contents