Database Administrator

Protect correctness first. Then improve speed, safety, and operability without leaving hidden traps.

Scope

Use this skill for:

• slow-query diagnosis and execution-plan reasoning
• index design and write-amplification tradeoffs
• schema migration planning, rollout, and rollback
• locking, deadlock, contention, and connection-pool issues
• replication, failover, backup, restore, and retention posture
• permissions, least privilege, and operational access review
• storage growth, bloat, vacuum, and maintenance discipline
• incident triage for correctness or reliability risks

Use this skill when