Category Archives: java

The Art of Java Application Performance Analysis and Tuning – Part 2

Posted on May 7, 2013 by omkreddy

This is the second article in the series of articles exploring the tools and techniques for analyzing, monitoring, and improving the performance of Java applications. The Art of Java Application Performance Analysis and Tuning-Part 1                                     The Art … Continue reading →

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The Art of Java Application Performance Analysis and Tuning – Part 1

Posted on May 7, 2013 by omkreddy

This is the first article in the series of articles exploring the tools and techniques for analyzing, monitoring, and improving the performance of Java applications. The Art of Java Application Performance Analysis and Tuning-Part 2                                     The Art … Continue reading →

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EhCache — Too Many Open Files

Posted on December 27, 2012 by omkreddy

EhCahce with  “diskPersistent=true” flag  is used to persist  the cache values to disk and can be used after system restarts. If you have many caches with “diskPersistent=true” then you may get “Too many Open files Exception”.  This is because EhCache is using nearly 30 open … Continue reading →

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Hibernate – Oracle : Creating Index For Foreign-Key Columns

Posted on December 27, 2012 by omkreddy

In Oracle adding Index for Foreign Key columns is  important for performance reasons.  And also if you are using transactions,  It is important to create index for FK columns.  With out  index your application may experience many deadlock problems. These indexes are automatically generated for MySQL … Continue reading →

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JacORB Configuaration

Posted on April 2, 2012 by omkreddy

Add the following JacORB  properties to java command line or update in jacorb.properties file To enable general debug logs add the below line -Djacorb.log.default.verbosity=4 To enable notification debug logs add the below line -Dorg.jacorb.notification.log.verbosity=4 To increase POA Queue. Increase this … Continue reading →

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Hibernate : Adding an enum as a property

Posted on April 1, 2012 by omkreddy

Using Hibernate Annotations: @Entity public class TestEntity {   @Enumerated(EnumType.STRING)    @Column(name=”ENUM_TYPE”)    private TestEnum testEnum;  } Using XML Based Mapping :   Add  hibernate-annotations.jar in your classpath during deployment but there’s no compile-time dependency: <property name=”testEnum” length=”30″ column=”testEnum” lazy=”false”> <type … Continue reading →

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YourKit

Posted on March 25, 2010 by omkreddy

I found YourKit Java profiler is good for CPU and memory profiling of java applications. It gave better , useful & smarter details compared to other profilers.

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Design Techniques

Posted on June 27, 2009 by omkreddy

Some usefull java design techniques articles by Bill Venners http://www.artima.com/designtechniques/

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Java in Telecommunications – Telemangement Forum and OSS/J

Posted on June 15, 2009 by omkreddy

By Gero Vermaas Source:http://blog.xebia.com/2007/04/19/java-in-telecommunications-–-telemangement-forum-and-ossj/comment-page-1/#comment-8950 As promised in the first post in this series, we’ll now zoom in on the Telemanagement Forum (TMF) and OSS/J. This post will be a bit theoretical, but I promise that the next one will be … Continue reading →

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Java in Telecommunications – Introduction

Posted on June 15, 2009 by omkreddy

By Gero Vermaas Source:http://blog.xebia.com/2007/03/30/java-in-telecommunications-introduction/ Why a blog on Java and telecommunications? There is no other industry for which the Java Community Process hosts so many specifications and I wonder if people are aware of this. Additionally, in May I’ll be … Continue reading →

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