DBA from Crisis to Confidence

DBA from Crisis to Confidence: "This article describes some of the steps for a thorough post-mortem that a DBA in crisis mode should follow, especially in crises that happened unknowingly, caused database outage or company dollars. It is very important that some of these tasks listed below be performed before you resort to such drastic measures as restarting the database or server it self. I classify these tasks into three categories, tested on 10g and Linux environments. Please ensure you can run the tasks on your specific environment before you use them.

hanganalyze;
system state dump;
Errorstack if a specific process is at fault. "