Performance Scaling Factor for Multi-Instance Mode

The maximum throughput (connections, VPN sessions) for a platform is calculated for an appliance mode device's use of memory and CPU (and this value is shown in show resource usage ). If you use multiple instances, then you need to calculate the throughput based on the percentage of CPU cores that you assign to the instance. For example, if you use an instance with 50% of the cores, then you should initially calculate 50% of the throughput. Moreover, the throughput available to an instance may be less than that available to an appliance.

For detailed instructions on calculating the throughput for instances, see https://www.cisco.com/c/en/us/products/collateral/security/firewalls/white-paper-c11-744750.html.