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Claudio Miranda

Claudio Miranda works as a consultant for Summa Technologies and has participated in some large projects in Brazil for financial and telco companies. He has 6 years of experience working with the java platform and has been a member of SouJava JUG since 2002. He has participated as speaker in some events (including JavaOne 2002), also helps some opensource projects in beta testing, forum and mailing lists, bugfixes, etc. He enjoys learning new trends in java development, architecture, web frameworks and looks forward to sharing his views with you here in English or on his Portuguese blog.


claudio's blog

Felipe Gaucho, we will miss you

Posted by claudio on March 6, 2010 at 10:20 PM PST

I heard from a friend that prolific blogger and friend Felipe Gaucho had passed away last March, 05.


Click to see a larger version

Heap dump on Linux 64 bits

Posted by claudio on October 1, 2008 at 8:52 PM PDT

I am working for a customer, doing some performance review for their java application and tuning glassfish as well.

They use linux 64 bits (kernel 2.6.18 SMP), glassfish v2 u2 and JDK 5 u12. At some point I needed to generate a heap dump to better understand the object allocation and if possible some hints as to where to look for optimization for the application.

HotSpot Internals

Posted by claudio on August 20, 2008 at 8:39 PM PDT

There is a wiki site at Sun, about HotSpot Internals, with valuable information to people who wants to better understand HotSpot but don't have the proper time to dedicate to such good reading of HotSpot source code.

Jetty and Solaris 10

Posted by claudio on July 16, 2008 at 10:31 AM PDT

This is a contribution to Jetty Web Server, to allow SMF on Solaris 10 machines to manage Jetty servers, see the benefits

Tools and Tips slides available

Posted by claudio on June 25, 2008 at 6:36 AM PDT

You can see my presentation about Tools and Tips to Diagnose Performance Issues on-line or download it.

Diagnose performance issues at Jazoon

Posted by claudio on June 13, 2008 at 10:23 PM PDT


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week I am heading up to the northern hemisphere to join a
crowd of Java professionals and enthusiasts to participate to Jazoon

Tools and Tips to Diagnose Performance Issues at Jazoon 2008

Posted by claudio on April 12, 2008 at 10:16 AM PDT

If I ask someone else what a Jazooner is, probably they could think it is a character from Klingon, right ?

NetBeans startup settings, beta version

Posted by claudio on April 2, 2008 at 9:45 AM PDT

A long time ago I have developed a plugin to NetBeans to graphically configure netbeans.conf file. The plugin is "NetBeans Startup Settings".

Use the comments' section to give feedback. Or send me an email claudio @@ 

NetBeans plugin portal page

Read office files with Java API

Posted by claudio on February 20, 2008 at 4:23 PM PST

Last year when working in a project, there were a lot of documents (requirements, user guides, architecture, etc.), from different sources (email attachments, file shares, backups, old version control). The same document name but different date and size.

So, how to know which one is the latest and delete the others ?

There were two ways to achieve that:

How many threads do your system scale per java process ?

Posted by claudio on May 23, 2007 at 9:14 PM PDT

A customer asked me to verify how many threads is possible to run concurrently at any java vm on the server. I did some search at the customer support site, but was not lucky to found any proper test utility, so I created one and hope it be useful to someone else.