# Prometheus Collector
The Prometheus Collector report gathers workload metrics from a Prometheus installation in order to provide fine-grained resource usage data. This can be used to gauge how much different workloads cost, understand cost trends, and help set resource requests and limits.
# Use an existing Prometheus installation
To use an existing Prometheus installation pass the following flag to the Helm chart installation:
Alternatively, you can click on Prometheus from the Report Hub (opens new window), and then:
- Click on the Configure tab
- Enter the service address of the existing Prometheus instance
- Click "Save"
- Be sure to Re-install the Fairwinds Insights agent (opens new window) in your cluster
# Install a new Prometheus
The Insights Agent chart can also install a new Prometheus server in your cluster to use. To install Prometheus alonside the Agent, pass the following flag to the Helm chart installation: