References
Oracle Database Performance Tuning Guide 11g Release 2
The Method R tuning methodology is a work of Cary Millsap. For more details I recommend reading his book Optimizing Oracle Performance
Expert Oracle Database Architecture: Oracle Database 9i, 10g, and 11g Programming Techniques and Solution by Thomas Kyte
Oracle Core: Essential Internals for DBAs and Developers by Jonathan Lewis
Oracle Wait Interface: A Practical Guide to Performance Diagnostics and Tuning by Gopalakrishnan and Richmond Shee
Analytic Functions: A Savior (http://momendba.blogspot.com/2008/11/analytic-funcions-savior.html)
Redo Log Switches at their Peak (http://momendba.blogspot.com/2011/02/redo-log-switches-at-their-peak.html)
How much expensive are Indexes? (http://momendba.blogspot.com/2008/03/how-much-expensive-are-indexes.html)
Oracle's whitepaper The Oracle Optimizer - Explain the Explain Plan (http://www.oracle.com/technetwork/database/focus-areas/bi-datawarehousing/twp-explain-the-explain-plan-052011...
