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Last month I looked at sizeof implementations. If you're interested in a little more about them or a little Java history (or both) then you might want to check my java.net blog entry (I'll be blogging there about once a month from now on).

A note from this newsletter's sponsor

And in the months previous to that I asked for volunteers to help me organise and keep up to date the massive wealth of Java performance tools I've uncovered over the years, and thank you very much to all who volunteered - I've been a bit busy but I promise I'll get to you this month! And for you, my readers, the first fruits of that volunteer program has now started, with updates to the books and GC log analysers pages, and a new page for thread analysers and those sizeof tools.

And I hope to have many more new tools pages in the coming months. Now on to all our usual sections: links to tools, articles, news and as ever, all the extracted tips from all of this month's referenced articles.

A note from this newsletter's sponsor

News

Java performance tuning related news.

• Business analytics tool based on TNT4j for analysing performance based on log entries
• Comparing performance of maps in OpenHFT/HPPC/fastutil/Goldman Sachs/Trove/Mahout/JDK
• A different view of metrics to monitor, based on some interesting questions
• Very good introductory talk about garbage collector implementation (not Java specific, though pretty similar to Java collectors). One interesting point at the end - the generational hypothesis is now so entrenched in garbage collection algorithms that you should try to avoid having objects that live mid-length lives (ie objects should mostly be short-lived and long-lived, otherwise you have a performance impact)
• A third of applications experience significant lock wait times during logging calls
• Rant about APM tools not working nicely with other tools

Tools

Java performance tuning related tools.

• Java Concurrency Tools
• (2014) "Wildfly Performance Tuning" Arnold Johansson, Anders Welén (Packt Publishing)
• (2014) "Java EE 7 Performance Tuning and Optimization" Osama Oransa (Packt Publishing)
• Using jinfo
• Books list updated
• GC log analysers updated
• New thread analysers tools page
• New sizeof tools page

A note from this newsletter's sponsor

Articles

• How to Instantly Improve Your Java Logging With 7 Logback Tweaks (Alex Zhitnitsky/takipiblog)
• Poll me, maybe? (Nitsan Wakart/Psychosomatic, Lobotomy, Saw)
• Chapter 1 of Java EE 7 Performance Tuning and Optimization (Osama Oransa/Packt Publishing)
• The Pitfalls of Parallelism (David Chisnall/InformIT)
• Are Your G1GC Logs Speaking to You? (Kirk Pepperdine/InfoQ)
• Glassfish 4 - Performance Tuning, Monitoring and Troubleshooting (Andy Overton/C2B2)

Jack Shirazi

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