MySQL 8.4 Upgrade: Proven Best Practices for Zero-Surprise Production Migrations

MySQL 8.0 reaches End-of-Life in April 2026. For organizations running 8.0 in production, the clock is ticking.

MySQL 8.4 is now the Long-Term Support (LTS) release, offering extended stability, security fixes, and predictable maintenance cycles. But upgrading from 5.7 or 8.0 to 8.4 is not a trivial binary replacement, it is a controlled production migration that requires compatibility validation, performance regression testing, and operational planning.

In this session, we present a production-tested upgrade methodology built from real-world MySQL upgrade engagements.

We will cover:

• Why upgrading before 8.0 EOL is critical (security, compliance, vendor support)
• Supported upgrade paths to MySQL 8.4 LTS
• Key behavioral and default changes impacting production workloads
• Using MySQL Shell Upgrade Checker effectively
• Query validation and regression detection with pt-upgrade
• Replica-first and rolling upgrade strategies
• In-place vs logical upgrade trade-offs
• Performance validation and workload replay
• Post-upgrade monitoring and observability using PMM
• Common upgrade failures and how to avoid them

Attendees will leave with a practical checklist and a repeatable execution plan to migrate confidently to MySQL 8.4 LTS, minimizing downtime, eliminating surprises and ensuring production stability.

This session is designed for DBAs, SREs, platform engineers, and technical decision-makers responsible for mission-critical MySQL environments preparing for the 8.0 End-of-Life transition.