Sleep is over rated. Sleepless from too many time zone changes from clients to then jumping on a plane and presenting at the IDUG conference in Vienna was great but a challenge. The baby two seats away from me had a bad flight over and I felt so sorry for Mom trying everything to stop . . . → Read More: IDUG Europe and DB2 Java Performance
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Another situation when a transaction runs into problems is when it must check something outside of the critical transaction path or its normal activity. For example, when a transaction uses seven different discrete web services to accomplish a complete transaction unit-of-work and after the third web service runs into . . . → Read More: DB2 Java Performance Standalone Transactions Part 2
In previous blog entries I have talked about transaction scope, how DB2 Java applications access the database too much and transaction units of work (UOWs) are not really analyzed properly. . . . → Read More: DB2 Java Performance Standalone Transactions Part 1 DB2 Java performance is often a problem because the application processing is emulating the database which executes more efficiently or the processing is poorly designed. Either of these scenarios that my teams have found during performance or design reviews always led to extended I/O . . . → Read More: Design DB2 Performance into Your DB2 Java Transactions Designing the Unit-of-Work for a given transaction entails many components. Different techniques and methods are incorporated depending on the components such as Hibernate, iBatis, JPA or Enterprise Bean technology to process the transaction. The Java transaction framework and the object patterns incorporated with the components also affect the transaction unit-of-work. All these factors together provide . . . → Read More: DB2 Java Performance: DB2 Design UOW Control DB2 Java Application References to the DatabaseOne of the first standards and principles neglected in the DB2 Java applications that I have seen is that the application references the database too many times to complete a single transaction. While . . . → Read More: DB2 Java Performance: DB2 Transaction Framework (cont.) Given the object model of Java and the relational model of the database, accessing data properly continues to be difficult for most Java application developers. Over the history of Java development, there have been many attempts within vendor products, interfaces and open source projects . . . → Read More: DB2 Java Performance: DB2 Transaction Framework Over the last three years, my clients have shown that multiple frameworks, architectures and programming patterns are usually implemented within the same project. The problem is the poor performance lessons experienced from the application implementation are not fully understood and the performance problems are . . . → Read More: DB2 Performance is Java Performance: Holy Grail (cont.)
When getting my taxes ready every year, I review the previous year’s activity. Reviewing 2008 has shown that the majority of my consulting was spent fixing and tuning DB2 Java based systems. This is not . . . → Read More: DB2 Performance is Java Performance: Holy Grail |
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