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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...
Assume Its 2 AM. Alerts are firing. CPU is maxed out, connections are piling up, and the application team is already asking for an ETA.
You SSH into the server, open psql, and start your usual routine - check pg_stat_activity, look at locks, scan logs, maybe run a few custom queries you’ve built over the years...
Most Oracle outages do not begin with hardware failure.
They start with a bad deployment, an accidental delete statement, a broken batch job, or a developer connecting to the wrong pluggable database at 2 AM. In a large multitenant environment, that usually means one application becomes corrupted while dozens of other applications ...
Selecting a database today isn’t just about technology - it's a strategic business decision. In production environments, the choice between PostgreSQL and Oracle Database affects scalability, reliability, compliance, and cost for years. As a DBA, architect, or infrastructure engineer, understanding the trade-offs between these systems can save significant headaches dur...