## Summary
Adds the **4.89.0** load test metrics artifacts, following the existing
`tools/loadtest/metrics/runs/` conventions.
### Baseline — `runs/baseline/489loadtest/`
18h run on a fresh RC instance (no data).
- `489loadtest-2026-07-10-210313Z-18h.json` / `.md`
### Migration — `runs/migration/487to489mig/`
4.87 → 4.89 migration, before vs. after.
- `487to489mig-2026-07-10-162812Z-1h.{json,md}` — pre-migration (1h
window)
- `487to489mig-2026-07-10-192738Z-130m.{json,md}` — post-migration (130m
window)
## Results
| Run | Fleet errors | ALB 5xx | Abnormal stops | Threshold checks |
|-----|:---:|:---:|:---:|---|
| Baseline (18h) | 0 | 0 | 0 | RDS Writer Deadlocks avg 0.13
(occasional, retried) |
| Migration pre (1h) | 0 | 0 | 0 | ✅ all within thresholds |
| Migration post (130m) | 0 | 0 | 0 | RDS Writer Deadlocks avg 0.08
(occasional, retried) |
The only flag is a near-zero average of occasional RDS writer deadlocks
(MySQL retries these); everything else is within expected range and
holds steady across the migration. Full per-metric comparison
(`compare-metrics.sh`) is posted on the release QA issue.
Data only — no code changes.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **Tests**
* Added baseline and migration load-test performance reports.
* Included infrastructure, database, Redis, load balancer, network,
container health, error, and SQL performance metrics.
* Added reports covering multiple test durations and migration intervals
for improved performance analysis.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
## Summary
Adds the loadtest metrics for the **4.86 → 4.87 migration** run,
following the existing `tools/loadtest/metrics/runs/migration/`
convention (cf. `485to486mig`).
Two files:
- `486to487mig-2026-06-17-195042Z-1h.md` — 1h metrics synopsis
- `486to487mig-2026-06-17-195042Z-1h.json` — raw collected metrics
## Results (1h window, 2026-06-17)
✅ All metrics within expected thresholds
- Fleet errors: **0**
- RDS deadlocks: **0**
- Abnormal container stops: **0**
- ALB 5xx: **0**
Data only — no code changes.
cc @AndreyKizimenko for approval.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Tests**
* Added load testing metrics data capturing performance statistics for
infrastructure components including Fleet Server, database, caching, and
load balancer metrics during a 1-hour test window.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Baseline loadtest results for Fleet 4.87.0 (20h run).
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Chores**
* Added baseline load test performance metrics for infrastructure
monitoring and analysis.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
## Summary
Adds a load test metrics tool under
[`tools/loadtest/metrics/`](tools/loadtest/metrics/) for capturing and
comparing AWS CloudWatch metrics across Fleet load test runs.
- **`collect-metrics.sh`** — discovers a load test environment's AWS
resources from its Terraform workspace name, pulls CloudWatch metrics
over a lookback interval, and writes a `.json` data file plus a
human-readable `.md` synopsis (with threshold alerts). Supports a
`--category` flag (`baseline` | `migration` | `mdm`) that files output
under `runs/<category>/<workspace>/`.
- **`compare-metrics.sh`** — diffs two or more runs side by side and
flags deltas as `ok` / `WARN` / `ALERT`. Searches `runs/` recursively,
and `--filter` doubles as a category selector thanks to the naming
conventions.
- **`runs/`** — committed historical runs, organized by category:
`baseline/`, `migration/`, `mdm/`.
- New `README.md` documenting usage, run organization, and how to submit
results; linked from the root `tools/README.md`.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **New Features**
* Added automated metrics tooling for AWS load-test environments —
collects ECS/RDS/Redis/ALB/network metrics, Performance Insights
top-SQL, CloudWatch Logs error samples, produces consolidated JSON +
Markdown summaries, and performs threshold checks with alerts.
* Added a metrics comparison tool to detect regressions across runs with
run selection, deduplication, per-metric comparisons, percent-change,
and aggregated alert synopsis.
* **Tests**
* Added numerous baseline and sample load-test metrics reports covering
multiple workspaces, intervals, and scenarios for validation and
regression analysis.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Andrey Kizimenko