Oracle Database performance tuning is a dance of insight and intuition, a symphony of numbers and narratives.In this blog, we unravel the Automatic Workload Repository (AWR) report, one of the DBA’s most powerful instruments for diagnosing bottlenecks, isolating pain points, and transforming sluggish systems into seamless symphonies. 1. What Is the AWR Report? The Automatic […]
In the realm of Oracle tuning, joins are the symphony that binds tables into meaningful insights. Yet, selecting the optimal join method—Nested Loops or Hash Join—can dramatically sway performance, especially as data volumes swell and query patterns evolve. This blog post guides you through comparing execution plans under varying data sizes, forcing a Hash Join, […]
In the symphony of Oracle performance tuning, the db file sequential read wait event often plays the most persistent—and disruptive—note. This event, emblematic of single-block reads from disk, signals that sessions are stalled waiting for I/O of one block at a time, typically during index lookups. Left unchecked, these waits can ripple across your database, […]
A typical AWR report is structured into several sections. Here’s a breakdown of the most critical ones you should focus on. Report Summary This is the first section and provides a high-level overview. It includes: Wait Events Statistics This is arguably the most important section. It identifies where the database spent most of its time […]