Today I found a blog entry by Tanel Poder, he has also discovered the way of visual performance analysis without expensive tools. He describes that it’s better to show a graph to non-DBA people than a bunch of statspack numbers. Not only that, a human brain can interpret much more numbers by looking at a graph than at a table full of numbers.
Here’s the link to the post: http://blog.tanelpoder.com/2008/12/28/performance-visualization-made-easy-perfsheet-20-beta/