By
Scalability Up to 250 requests per second Application stability
Performance - For 95% of the transactions < 7 seconds
- For 5% transactions < 10 seconds
Probe tools measuring response
times at different geographies
Availability 99.96% during schedules service hours Tools measuring availability metrics
Approaches to Bu ld ng H gh Performance Web Appl cat ons
Copyright ?© 2007, Idea Group Inc. Copying or distributing in print or electronic forms without written permission
of Idea Group Inc. is prohibited.
Some developers have resorted to irrational behavior to confuse the user. If an error occurs
when submitting a form, some applications redirect the user to a different page, possibly
unrelated, in the hopes of confusing or at least giving the appearance that the user might
have actually been at fault. ???When in doubt, redirect to the home page??? is a motto no one
should be fond of, but it happens.
More sophisticated developers include a clear and direct message acknowledging the error.
Sometimes an alert is generated for the benefit of the systems team; other times, the Web
applications present the message to stop any further complaint. These approaches often tailor
errors with reasonably coherent messages.
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