How to Keep DBA Operations Error‑Free: 5 Essential Practices

Inspired by Murphy’s Law, the author reflects on the inevitability of errors in DBA work and stresses the need for composure during online incidents.

1. Prepare before each operation

A reliable DBA prioritises stability over speed. Before handling tickets, night‑time maintenance, or urgent failures, the author habitually gathers the server IP list, required scripts, common commands, and relevant documentation. Using tools like Evernote to store frequently used commands (while omitting sensitive information) reduces manual typing, which is error‑prone under pressure.

2. Analyse the fault thoroughly

When a failure occurs, consider the entire technology chain—user layer, access layer, logic layer, and data layer—rather than focusing solely on the database. Collect information from monitoring systems, logs, and other teams to avoid wasted trial‑and‑error cycles and to identify whether the issue is isolated or part of a broader chain.

3. Communicate effectively

Achieving information symmetry across teams is a soft‑skill challenge. DBA should ask precise questions, coordinate with monitoring, development, testing, product, and operations teams, and synthesize feedback from each layer to form a comprehensive view before taking action. Inefficient communication can cripple online operations.

4. Always backup before changes

Remember that “backup is paramount.” Before modifying configuration files, always create backups and avoid risky commands like rm. For tickets involving DROP or TRUNCATE, double‑check the existence and validity of backups, and treat high‑risk operations with explicit confirmation.

5. Conduct post‑incident review

After any incident, perform a structured review: analyse the root cause, evaluate the process, identify infrastructure gaps, and document findings. Build a knowledge base with incident reports and summaries, and share them with new team members to accelerate learning and prevent recurrence.

In summary, a great DBA combines solid technical habits with strong personal qualities—discipline, mental resilience, responsibility, and communication—to continuously improve both technical depth and operational reliability.