For each asynchronous thread spawned in the course of executing a business transaction, Splunk AppDynamics collects and reports these metrics:

• Average response time
• Calls per minute
• Errors per minute

You can create custom health rules based on the performance metrics for a thread task. When you click the metric icon in the Health Rule Wizard, the embedded metric browser includes the Thread Tasks if the entity for which you are configuring the health rule spawns multiple threads. See Configure Health Rules.