how to increase the performance of an application

How can we increase the perform开发者_开发技巧ance of an application. My application is written using Java, Hibernate, Servlets, Wsdl i have used for web services. I have executed some of the tests on linux machine, so that i can get proper TPS of the execution.

but still , i am not satisfied by the performance.

So for this, what all steps i should try to increase the performance.

adding to above, i have executed code coverage and used find bugs in the code prominently for each and every test and every service i have written.

Individual suggestions are invited.

Thanks.

Profile your application, and remove all of your bottlenecks.

In addition, or better before, take a day or two and read as much from the Java Performance Tuning newsletters as you understand.

You should monitor your application with a tool like VisualVM, JProfiler etc. to determine the performance bottleneck(s). It is pointless to tune the application without knowing where the actual performance problems are located.

In a professional environment, I suggest dynaTrace that can show you performance bottlenecks along the execution path. The tool can show you exactly where the application spends its time.

Is the performance related to disk I/O or network I/O? In a high throughput system (from DB point of view) Hibernate might not be the best way to go. If you have a lot of writes I would recommend you use a different mechanism to write to database -- perhaps simply switching to simple JDBC might speed it up? Secondly, is it the case that your webservices are taking too long to get back with results? SOAP is not the fastest protocols really -- have you looked at something like REST maybe coupled with JSON ?