EventBridge interaction events throttling Lambda concurrency

The compliance routing update just triggered a spike and EventBridge is dumping batches into the consumer. Lambda hits the reserved concurrency cap and drops records while we’ve got a simple Python handler sitting idle. The documentation mentions a batch window setting but the console UI doesn’t show where to change it.

  • Region: us-east-1
  • Reserved concurrency locked at 150
  • Python 3.9 runtime
  • Standard EventBridge batch payload
{
 "Records": [
 {
 "EventSource": "aws.events",
 "EventBusName": "genesys-interactions",
 "EventId": "x9y8z7",
 "Detail": {
 "eventType": "interaction.routed",
 "interactionId": "q1w2e3r4"
 }
 }
 ]
}

Checking the EventBridge bus config now.