---
phase: 22-course-load-testing
plan: 01
subsystem: docs
tags: [load-testing, course, tutorial, hdrhistogram, capacity-planning, breaking-point]

# Dependency graph
requires:
  - phase: 20-book-load-testing
    provides: "Ch 14 reference content for load testing (source material for course tutorial)"
provides:
  - "Complete Ch 18-03 hands-on load testing tutorial for pmcp-course"
  - "Step-by-step instructions for cargo pmcp loadtest (init, run, config, staged profiles)"
  - "Teaching content for HdrHistogram percentiles, coordinated omission, breaking point detection"
  - "Capacity planning framework with deployed server example"
affects: [24-course-quizzes]

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "Course teaching style: Learning Objectives, step-by-step, ASCII diagrams, Try this exercises, Practice Ideas"

key-files:
  created:
    - "pmcp-course/src/part7-observability/ch18-03-performance.md"
  modified: []

key-decisions:
  - "Used calculator server from Ch 2 as consistent test target throughout tutorial"
  - "Structured as progressive difficulty: first test -> config deep dive -> staged profiles -> metrics -> breaking point -> deployed server -> capacity planning"
  - "Included ASCII visualization for coordinated omission to make abstract concept concrete"

patterns-established:
  - "Progressive hands-on structure: each section builds on the previous, introducing one concept through doing"

requirements-completed: [CRLT-01, CRLT-02, CRLT-03]

# Metrics
duration: 5min
completed: 2026-02-28
---

# Phase 22 Plan 01: Course Load Testing Tutorial Summary

**952-line hands-on load testing tutorial covering cargo pmcp loadtest from first run to capacity planning with HdrHistogram percentiles, breaking point detection, and deployed server examples**

## Performance

- **Duration:** 5 min
- **Started:** 2026-02-28T03:54:44Z
- **Completed:** 2026-02-28T03:59:54Z
- **Tasks:** 2
- **Files modified:** 1

## Accomplishments

- Complete Ch 18-03 tutorial replacing one-line stub with 952-line hands-on chapter
- All source code verified against actual implementation (config.rs, init.rs, engine.rs, metrics.rs, breaking.rs, report.rs, summary.rs)
- Teaching style matches course exemplars with Learning Objectives, step-by-step instructions, ASCII diagrams, tables, Try this exercises, and Practice Ideas

## Task Commits

Each task was committed atomically:

1. **Task 1: Write Ch 18-03 sections 1-5 (setup through staged load profiles)** - `f41e6ba` (feat)
2. **Task 2: Write Ch 18-03 sections 6-10 (metrics, breaking points, deployed server, capacity planning)** - `8fcc8a6` (feat)

## Files Created/Modified

- `pmcp-course/src/part7-observability/ch18-03-performance.md` - Complete hands-on load testing tutorial (952 lines)

## Decisions Made

- Used calculator server from Ch 2 as the consistent test target -- learners already know it from earlier chapters
- Structured sections in progressive difficulty order so learners build on each concept
- Added ASCII diagram for coordinated omission correction to make the abstract concept visual and concrete
- Included realistic deployed server example with staging workflow rather than just reference material
- Capacity planning section uses concrete VU-to-P99 table and decision framework for actionable guidance

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- Ch 18-03 complete, ready for Phase 24 quiz generation
- Cross-references to Ch 14 (book) are in place for full reference documentation

## Self-Check: PASSED

- File `pmcp-course/src/part7-observability/ch18-03-performance.md`: FOUND (952 lines)
- File `.planning/phases/22-course-load-testing/22-01-SUMMARY.md`: FOUND
- Commit `f41e6ba` (Task 1): FOUND
- Commit `8fcc8a6` (Task 2): FOUND

---
*Phase: 22-course-load-testing*
*Completed: 2026-02-28*
