Performance Tuning Overview

Performance problems occur in a small portion of code

4% of application code accounts for more than 50% of the execution time. - Donald Knuth

20% of application code accounts for 80% of the execution time - Barry Boehm

Developers, using guesswork, are notoriously bad at deciding what code to optimize

Measuring performance statistics helps developers find that 4% of code to optimize

Monitoring Web Applications

In Web applications it is particularly important to monitor code, due to

An unpredictable load and number of users

Many possible bottlenecks: Is the performance problem in servlets, JSPs, EJBs, the web server, the database, the network…?

By building monitoring into an application from the start, developers can spend time solving performance problems not diagnosing them!

Enter JAMon

Advantages of JAMon

Finding Performance Bottlenecks

Identifying Power Users

JAMon - References

JAMon - Industry Notice

JAMon Demo

Slide 11


	Performance problems occur in a small portion of code
		4% of application code accounts for more than 50% of the execution time. - Donald Knuth
		20% of application code accounts for 80% of the execution time - Barry Boehm
	Developers, using guesswork, are notoriously bad at deciding what code to optimize
	Measuring performance statistics helps developers find that 4% of code to optimize


	In Web applications it is particularly important to monitor code, due to
		An unpredictable load and number of users
		Many possible bottlenecks: Is the performance problem in servlets, JSPs, EJBs, the web server, the database, the network…?
	By building monitoring into an application from the start, developers can spend time solving performance problems not diagnosing them!