Running JMeter scripts with 200 concurrent calls against a standard IVR flow. Requests hit the initial greeting but drop after the second Set Variable block. The logs show 408 Request Timeout from the Genesys Cloud edge. Increasing the timeout in the test plan did not help. The flow processes fine with low concurrency. Is there a specific node limit or configuration setting in Architect that throttles execution under load?
I normally fix this by isolating the synchronous API trigger calls within the flow. The 408 error often stems from resource contention when multiple sessions attempt to hit external endpoints simultaneously. The platform has strict latency limits for these triggers, and scaling to 200 concurrent users exposes this bottleneck quickly.
- Replace synchronous API triggers with asynchronous webhooks where possible. This prevents the flow from blocking while waiting for external responses.
- Implement exponential backoff logic in your external service to handle retries gracefully without overwhelming the Genesys Cloud edge.
- Verify that your OAuth tokens are not expiring mid-execution during high load, which can cause unexpected delays.
This approach significantly reduces the load on the Architect engine and improves overall stability. Monitoring the API rate limits in the admin portal also helps identify if you are hitting throttling thresholds.