The dyno count metric shows the number of dynos running at a given time. Dynos are the units of computing power used to run your application processes.
If autoscaling is enabled, you may notice changes in the dyno count graph over time. These adjustments are made automatically based on application load — for example, when queue time increases (requests waiting longer to be processed), the platform adds more dynos to handle the demand. Similarly, when traffic decreases, dynos are scaled down to optimize resource usage.
Monitoring dyno count alongside performance metrics such as response time and queue time helps you validate whether autoscaling is working effectively to keep your application responsive.