13.3. Monitoring the Server Load

Jenkins provides build-in monitoring of server activity. On the Manage Jenkins screen, click on the Load Statistics icon. This will display a graph of the server load over time for the master node (see Figure 13-7). This graph keeps track of three metrics: the total number of executors, the number of busy executors, and queue length.

The total number of executors (the blue line) includes the executors on the master and on the slave nodes. This can vary when slaves are brought on and offline, and can be a useful indicator of how well your dynamic provisioning of slave nodes is working.