Capacity / Performance management

Capacity / Performance management wiki

Very interesting set of tips:
http://social.technet.microsoft.com/wiki/contents/articles/7926.sharepoint-2010-tips-for-dealing-with-performance-issues.aspx

SQL Server:
http://shijusamuel.wordpress.com/2011/02/16/performance-counter-preferred-values/

IIS:
http://technet.microsoft.com/en-us/library/cc782186(v=WS.10).aspx

FAST
http://technet.microsoft.com/en-us/library/ff383289.aspx