The Hitchhiker’s Guide to the EXPLAIN PLAN Part 37: POISED: A problem-solving method

P.O.I.S.E.D. is the acronym I invented for the performance tuning method described by Chris Lawson in The Art and Science of Oracle Performance Tuning; it stands for Problem, Observation, Interpretation, Solution, Execution, and Documentation. The Observation and Interpretation phases feed each other. The Interpretation phase concludes with a determination of root cause. If we are investigating poor performance a single SQL statement, the tool of choice for the observation phase is SQLT for all but the simplest cases.(read more)