Posted by Jeroen Borgers in the late evening: February 18th, 2009
By Jeroen Borgers
Last week I instructed an in-house performance tuning course and explained the participants about the threading optimizations in the Java 6 VM. We run the exercises of the course on Java 6 update 11 and when I told them that Escape Analysis did not work properly yet, I realized I did not really know this for a fact for this update of Sun’s Java. So, it is time to re-run the benchmark and find some unexpected results. (more…)
Posted by Jeroen Borgers in the early afternoon: September 15th, 2008
By Jeroen Borgers
Recently, I was called in by a company with a website in trouble. And because they make all their money on-line, it was evident that they really wanted to have the issue solved. The day I came in, the site had gone down about 5 times the last 24 hours. Because of this they got less traffic, which directly meant less revenue. The log files showed periods of long response times and OutOfMemoryErrors. Their questions were: Why do we get this behavior? and How do we fix it? My short answer turned out to be: because of too many loitering objects; and this can be fixed by not holding on to them in the HTTP session. (more…)
Posted by Jeroen Borgers in the early afternoon: December 21st, 2007
Escape Analysis in Java 6?
Last month we held our Speeding up Java applications course in the Dutch woods. When preparing for it, I discussed some of the new topics with my peer instructor and creator of the course Kirk Pepperdine. We explain new features of Java 6 and how they can help improve your performance. One of the more sophisticated features on the VM level is called escape analysis. The question is: does it really work? (more…)
Posted by Jeroen Borgers in the late afternoon: September 6th, 2006
On October 31 Kirk Pepperdine – authority in the field of java performance tuning – will join us to hold a 4 days during workshop. Five Xebia internal attendants registered and the remaining seven seats are open for external attendants. For course details go here.
I interviewed Kirk Pepperdine. He is CTO of javaperformancetuning.com and editor of TheServerSide. Kirk talks about the course he provides with us, his work as a consultant and how he tackles performance problems on-site. So if you think about following the course or if you just look for Java performance tips and experiences, this interview is for you.