As database professionals, we’ve all been there – that dreaded moment when users start complaining about slow queries, and suddenly everyone’s looking at you with that « fix it now » expression. Oracle performance tuning can feel overwhelming, especially when you’re under pressure, but the good news is that most performance issues stem from a handful of common culprits. Let me walk you through some battle-tested techniques that have saved my bacon more times than I can count.
Start with the Low-Hanging Fruit: Statistics and Execution Plans
Before diving into complex tuning strategies, always check if your statistics are current. Oracle’s cost-based