Oracle DBA Blog

Field notes and deep dives from 14 years of Oracle practice.

RAC vs Restart: Choosing the Right Architecture for 19c/23AI

Architecture • 8 min read

RAC shines for HA/scale but requires network, storage, and patch planning maturity. Restart reduces complexity for single-instance deployments with reliable service management and automatic instance restarts. Here’s how I compare them in real life…

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Exadata Patch Lifecycle — What to Validate Before and After

Exadata • 7 min read

A pre-patch checklist that actually prevents rollbacks: cell/compute versions, smart scan validation, storage alerts, IORM baselines, offload ratios, and critical post-checks you can automate.

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AWR–Driven Performance Tuning Playbook

Performance • 10 min read

From top waits to SQL plan stability, this step-by-step workflow turns AWR reports into concrete performance actions with before/after validation and risk controls.

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