MySQL 8.0: Performance Tuning — Lesson 1: Performance Schema, sys Schema, Workload Baselines, and Measurement

Learning Objectives

• Explain the architecture, workflow, or business purpose behind performance objectives, representative load, and test controls.
• Apply Performance Schema instruments, consumers, events, and summaries and sys schema views for statements, waits, I/O, and users in a controlled scenario.
• Validate outcomes and troubleshoot risks involving slow query log, metrics, baselines, and before-and-after evidence.

Detailed Topics

• performance objectives, representative load, and test controls
• Performance Schema instruments, consumers, events, and summaries
• sys schema views for statements, waits, I/O, and users
• slow query log, metrics, baselines, and before-and-after evidence

Instructor Demonstration

Demonstrate performance objectives, representative load, and test controls within an e-commerce MySQL workload with slow searches, checkout lock waits, replica lag, and uneven resource use, then capture the exact configuration, command, transaction, report, model, query, code, or process evidence that proves the result for lesson 1.

Hands-On Exercise

Implement a controlled exercise covering Performance Schema instruments, consumers, events, and summaries and sys schema views for statements, waits, I/O, and users, then introduce and resolve an exception involving slow query log, metrics, baselines, and before-and-after evidence while preserving before-and-after evidence.

1. Confirm the environment, identities, inputs, dependencies, risks, and expected outcome.
2. Complete the course-specific configuration, development, analysis, or process workflow.
3. Capture settings, commands, data, outputs, logs, reports, screenshots, calculations, or test results.
4. Compare the observed result with acceptance criteria and document corrective action.

Scenario Analysis

• Identify the technical or business decision that must be made.
• Compare valid approaches and their security, performance, reliability, cost, compliance, and support trade-offs.
• Define rollback, recovery, ownership, communication, and evidence requirements.

Troubleshooting Guidance

Diagnose issues across performance objectives, representative load, and test controls, Performance Schema instruments, consumers, events, and summaries, sys schema views for statements, waits, I/O, and users, slow query log, metrics, baselines, and before-and-after evidence without making an unverified production change. Separate symptoms from causes, gather evidence, test the smallest reversible correction, rerun validation, and record preventive action.

Validation Checklist

• The requirement, scope, inputs, dependencies, and expected result are documented.
• The result is reproducible and supported by course-specific evidence.
• Normal, boundary, failure, security, performance, and operational conditions are reviewed.
• Exceptions, rollback, ownership, and the next improvement priority are recorded.

Lesson Outcome

Learners can apply Performance Schema, sys Schema, Workload Baselines, and Measurement in a realistic MySQL 8.0: Performance Tuning scenario and validate the result with documented evidence.