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A PostgreSQL database can look completely healthy until the day you try to restore it.
A database incident rarely begins when the monitoring system raises an alert. It usually begins weeks earlier - with an unreviewed execution plan, an ignored capacity trend, an oversized privilege, or a recovery procedure that nobody has tested.
If you have ever recovered an Oracle database and opened it with RESETLOGS, chances are someone whispered or shouted—the dreaded question: “Are all my old backups now useless?” Lets set the record straight: in modern Oracle releases, your old backups are still very much usable, an...
If you have worked in production environments long enough, you have probably seen this situation before. An alert fires in the middle of your daily shift appears.. as "CPU is at 90%. The database must be overloaded."
Infrastructure teams immediately start discussing scaling CPU, adding cores, or moving the data...
In high‑availability database environments, About Interview discussion often centers on how systems react when things go wrong ., especially in mission‑critical deployments like Oracle RAC (Real Application Clusters). One of the most common interview questions DBAs face is: In a 3‑node RAC, if one node goes down, how does i...