You’re building a user registration system. Everything works fine with 100 users. Then you hit 10,000 users and your database grinds to…
Introduction The ORA-30012 error, which indicates “undo tablespace does not exist or is of wrong type,” is one of the most frequently…
Oracle Automatic Storage Management (ASM) serves as the foundational storage management layer for Oracle Exadata environments. By organizing grid disks into logical…
Quick Summary Oracle database patching is a critical DBA responsibility involving applying updates to fix bugs, security vulnerabilities, and add new features.This…
Quick Summary Oracle Data Guard is Oracle’s disaster recovery (DR) and high availability (HA) solution that maintains one or more standby databases…
Introduction Preparing for an Oracle DBA interview?Interviewers often focus on database architecture fundamentals and real production scenarios rather than just textbook definitions.…
Monitoring system performance is a critical task for system administrators and developers. While the top command provides comprehensive resource information, sometimes you…
You wake up to a notification: someone logged into your email from Russia. Your heart sinks. Panic sets in. How did they…
You probably think your phone is private. After all, it’s password-protected, and you’re careful about what you download. However, right now—as you…
