Real-time Analytics API 503 Service Unavailable during high-concurrency load test

General Discussion
1

Running a JMeter 5.6 load test to validate real-time analytics API throughput on Genesys Cloud US1. The goal is to simulate 50 concurrent requests fetching active interaction stats via GET /api/v2/analytics/events/query. The test aims to measure latency under sustained load for a dashboard refresh scenario.

Setup:

  • JMeter 5.6 with 50 threads, loop count 100.
  • Target: GET /api/v2/analytics/events/query with a 30-second lookback window.
  • Environment: Genesys Cloud US1.

Issue:
After 2 minutes of steady state, the response time spikes from ~200ms to >3000ms. Subsequently, 40% of requests fail with 503 Service Unavailable and 429 Too Many Requests. The error payload indicates RateLimitExceeded.

Observations:

  • Checked X-RateLimit-Remaining headers; they drop to zero quickly.
  • Tried adding a 2-second delay between requests, but the 503 errors persist at high concurrency.
  • Verified the Analytics API is enabled in Admin.

Is there a specific rate limit for real-time analytics endpoints that differs from standard REST APIs? How should the load test be configured to avoid hitting these limits while still validating capacity? Any advice on handling these rate limits in JMeter?