JVM

 

elad 05/01/2010 - 16:37

This post discusses the reasons for moving to 64-bit VM and the performance characteristics of 64-bit machine vs. 32-bit VMs
It's based on the HotSpot VM FAQ (http://java.sun.com/developer/technicalArticles/Programming/HPROF.html) .

On a 32-bit Windows systems, the maximum heap size per Java VM process ranges between 1.5 to 1.6 GB (in practice).
You can see the explanation here: 32-bit Windows and JVM virtual memory limit (http://sinewalker.wordpress.com/2007/03/04/32-bit-windows-and-jvm-virtua...)

If your application requires a larger heap, you should use a 64-bit VM. The primary advantage of running Java in a 64-bit environment is the larger address space.
This allows for a larger Java heap size and an increased maximum number of Java Threads.
It's important to note that 64-bit implementation doesn't mean that that built-in Java types (such as integers) are doubled in size from 32 to 64.

elad 08/09/2009 - 11:21

Recently I had the chance to help one of our clients (company XXX) analyze and detect performance issues. Below are the main issues raised during the consultation session and the recommended course of action for each problem. I am presenting these here for the benefit of other employees who might be needed to do the same type of consulting.

General background: company XXX reported several problems, mainly related to high memory consumption and thread exhaustion, with respect to their product at one of their largest clients web site.

shlomo 03/06/2009 - 10:38
JVM

http://www.jtict.com/blog/rails-wicket-grails-play-lift-jsp/

 

Yet another micro benchmark comparing several web frameworks, primarily on the JVM

ittayd 31/05/2011 - 05:57

y inheriting, to a large extent, the Ruby syntax and coding style and incorporating many of its most compelling features, from numeric ranges through closures and on to hash parameters, the language has much the feel and appearance of developing in a modern dynamic language.

 

http://cogitations.arbia.co.uk/post/3984477935/fun-java-with-mirah

 

 

ittayd 21/03/2011 - 08:09
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