Why does this setting in the Genesys Cloud WFM API trigger immediate rate limiting when running high-concurrency JMeter tests from the ap-southeast-1 region?
- Running a load test to simulate bulk schedule adherence exports using the
GET /api/v2/wfm/schedule-adherence/reportendpoint. - The goal is to validate API throughput under peak operational load, specifically targeting 500 concurrent requests per second over a 10-second ramp-up period.
- Environment details:
- Genesys Cloud instance in ap-southeast-1 (Singapore).
- JMeter version 5.6.2 with HTTP Request Defaults configured for basic auth via API keys.
- Thread Group: 500 threads, ramp-up 10s, loop count 1.
- Expected behavior: The API should handle the burst according to standard platform rate limits, possibly queueing requests or returning 202 Accepted for async processing.
- Actual behavior:
- Immediate 429 Too Many Requests errors for approximately 85% of the requests within the first 2 seconds.
- The
Retry-Afterheader is not consistently present, making automated retry logic difficult to implement reliably in the JMeter script. - Response times for the successful 15% spike up to 4-5 seconds, which is outside acceptable SLA thresholds for our reporting dashboard.
- Question specifics:
- Is there a specific per-tenant rate limit for the WFM adherence report endpoint that differs from general WFM API limits?
- Are there specific headers or query parameters (like
expandfields) that significantly impact the rate limit calculation for this endpoint? - Should I be using a different endpoint or method for bulk adherence data extraction during load testing scenarios?
- Any recommendations for JMeter configuration to better handle 429s without overwhelming the tenant further?
Looking for insights from others who have performed similar load tests on WFM APIs. Current setup seems to hit a hard wall much faster than documented limits suggest.