Understanding Performance SLA Pass Rate
How we calculate. SLA pass % = (in-SLA samples ÷ total samples) × 100. The form uses the same arithmetic as the worked examples on this page. See our methodology and accuracy policy.
Real-world scenario: A typical Performance SLA Pass Rate case uses samples within sla 9400 and total samples 10000. Enter the same figures below to reproduce the worked path.
What is Performance SLA Pass Rate?
A gate-friendly metric for performance tests: e.g. “% of requests under 300 ms” or “% of iterations meeting all checks.”
- Define the SLA check before the run
- Not the same as functional pass rate unless checks include both
- Report with the threshold in every summary
The Formula
Worked Example
Common Use Cases
- CI perf gates: minimum pass %
- Vendor SLAs: evidence of compliance
- Release hardening: track improvement
Pro Tips
- Exclude known bad environments from formal gates
- Split by critical endpoints
- Pair with error rate
Limitations: Performance SLA Pass Rate figures are educational performance-testing aids—not contractual capacity guarantees. Validate with calibrated load tools and production telemetry.
FAQ
Is 95% pass good?
It depends on the threshold and business risk. A loose threshold with 95% can still feel slow.
Count timeouts?
Timeouts typically fail the SLA sample unless your contract says otherwise.
Authoritative References
For performance and quality engineering context, consult:
- ISTQB — performance testing syllabus topics
- W3C Navigation Timing — browser performance timing
- CMG / capacity forums — capacity and performance practice communities