Oracle Database 19c: Performance Management and Tuning — Lesson 3: Storage, I/O, Redo, Undo, TEMP, and ASM Performance

Learning Objectives

• Explain the architecture, workflow, or business purpose behind datafile and segment I/O patterns.
• Apply redo generation, log switches, checkpoints, and commit latency and undo retention, TEMP usage, spills, and large operations in a controlled scenario.
• Validate outcomes and troubleshoot risks involving ASM, operating-system, and storage latency correlation.

Detailed Topics

• datafile and segment I/O patterns
• redo generation, log switches, checkpoints, and commit latency
• undo retention, TEMP usage, spills, and large operations
• ASM, operating-system, and storage latency correlation

Instructor Demonstration

Demonstrate datafile and segment I/O patterns within an order-processing workload whose response time degrades during peak volume and requires evidence-led diagnosis, then capture the exact configuration, command, transaction, report, model, query, code, or process evidence that proves the result for lesson 3.

Hands-On Exercise

Implement a controlled exercise covering redo generation, log switches, checkpoints, and commit latency and undo retention, TEMP usage, spills, and large operations, then introduce and resolve an exception involving ASM, operating-system, and storage latency correlation 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 datafile and segment I/O patterns, redo generation, log switches, checkpoints, and commit latency, undo retention, TEMP usage, spills, and large operations, ASM, operating-system, and storage latency correlation 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 Storage, I/O, Redo, Undo, TEMP, and ASM Performance in a realistic Oracle Database 19c: Performance Management and Tuning scenario and validate the result with documented evidence.