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I had the pleasure of a JMX demonstration from Eamonn McManus, Sun's JMX team technical lead. Probably I'm behind the curve on this, because I don't have lots of time to look at everything available in the Java world, so I was delighted to see that you could define a JMX bean which would show up in the jconsole tool without any real effort. The whole thing is incredibly easy.

What I really liked about this is the implication that Sun have now, and will in future be further developing, a monitoring console that is incredibly easy to add application level monitoring information to. What is more, it should be relatively easy implement or extend the jconsole itself if Sun ever give up on it - always a concern if you want to start putting serious effort into extending the capabilities of an existing monitoring tool in any serious way. Well done Sun.

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Now read on for our news, our selected articles and our many new extracted performance tips.

News

Java performance tuning related news.

• JXInsight 4.1 which include many new innovative enhancements.
• 1.6 (Mustang) can use escape analysis to move objects onto the finalisation queue without gc and remove locks. But the stack allocation escape analysis is now scheduled for 1.7 (Dolphin)
• The list of games submitted to Java 4K 2006
• 1.6 looks to be faster than 1.5
• NIO vs IO (using HTTP Connectors, shows NIO is as good or better)

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Tools

Java performance tuning related tools.

• cache4j perfomance tester
• Jofti - high-performance indexed Map for searching an existing cache/store layer
• JIP - Pure Java profiler using 1.5 agent capability
• IBM Thread and Monitor Dump Analyzer for Java Technology

A note from this newsletter's sponsor

Articles

• Speeding default JBoss (Andrew Oliver/JBoss)
• Good housekeeping practices (Brian Goetz/IBM)
• Concurrent Programming and Locking in J2SE 5.0 (Craig Caulfield/JDJ)
• Copying Arrays Fast (Heinz Kabutz/JavaSpecialists)
• Clustering at the JVM Level (Ari Zilka/DevX)
• Database Connection Pooling (Kunal Jaggi/OnJava)
• Realtime Form Validation Using AJAX (Greg Murray/Sun)

Jack Shirazi

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