Performance alerts can be generated when CPU, memory usage, network, storage throughput, or VM disk activity exceeds a specified threshold on a managed server, virtual machine, or storage repository. By default, the alert repeat interval is set to 60 minutes, and it can be modified if required.
Performance alerts will appear in the Alerts view (accessed by clicking on the Notifications button on the left hand pane). In addition, you can have performance alerts emailed to you along with other alerts: see XenCenter Alerts.
To configure performance alerts: