Writing Optimal SQL & Troubleshooting & Tuning with Jonathan Lewis February 15, 2011

Trouble-shooting or Tuning - What's the difference? What are the strategies. Why tuning is hard but trouble-shooting is easy. Key targets, indicators and mechanism for producing a well-tuned system on day one. Strategies for dealing with badly performing systems after go-live.

Frequently Occuring Problems - Some of the most commonly occuring issues that affect performance after a system has gone into production. Methods for spott...ing them, measuring the impact and dealing with the cost/risk/benefit triangle involved in fixing them. Getting into the habit of pre-emptive analysis and pro-active fixing.

Quick Fixes - Methods, workaround and dirty tricks for dealing with classic performance problems when the system is in production. There really aren't quick fixes that can be applied across the board - each one needs careful examination of costs, risk and benefits. In this sesion we consider some of the options that are most likely to be worthwhile.

V$ and X$ - It's a good idea to be familiar with just a few of the dynamic performance views - and there are a couple of items in the still hidden away in the X$ objects that can add a little value. This sesion will describe the views that are most commomly of use and explain the meaning of some of the most obscurely named but potentially useful items.

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