performance

Want a script that sends you (up to) monthly sar reports without you having to think about the process? Today's script is way smarter than what I showed you a few weeks ago. It just works with the data it finds.

The best trick for understanding performance problems on a Unix system is to understand performance when it ISN'T a problem. If you know what acceptable performance looks like, you'll quickly spot what's out of whack when a system is hurting. And one of the best tools for routine performance monitoring is built into many Unix systems -- sar, the system activity reporter.

A tiny assembly-level change makes a big difference in one test. Cameron promises many more examples of gains.

There is no service more basic to Internet performance and security than DNS -- the set of functions that turns names users can remember and type into addresses that the computer uses to find stuff. There's only one part of the entire mobile enterprise infrastructure that gets less attention than DNS. (Which part is that?