This article at InformIT (free reg. req’d), provides a brief introduction to optimization on the Solaris Operating Environment. To explore this subject in more detail, refer to Rajat Garg’s and Ilya Sharapov’s Sun BluePrints book, “Techniques for Optimizing Applications,” published July 2001.
http://www.amazon.com/exec/obidos/ASIN/0131496425
This is the best text on Solaris tuning that I’ve ever seen.