MySQL Mastery (Senior → Principal)

Operate

• Start from workload shape, consistency requirements, and operational model.
• Treat MySQL as a production system: schema, indexes, replication, backups, failover, and migrations all matter.
• Prefer explicit transactional boundaries and predictable query patterns.
• Optimize for boring operations rather than magical ORM assumptions.

Default Standards

• Model invariants with schema and transactions first.
• Index for real query patterns and sort paths.
• Keep long transactions and lock-heavy flows visible.
• Replication lag and failover behavior must be known, not guessed.
• Online change workflows need review before rollout.

References