You can run Update Manager on any system that meets the minimum hardware requirements.

Minimum hardware requirements for Update Manager vary depending on how Update Manager is deployed. If the database is installed on the same machine as Update Manager, requirements for memory size and processor speed are higher. To ensure acceptable performance, verify that your system meets the minimum hardware requirements.

Table 1. Minimum Hardware Requirements
Hardware Requirements
Processor Intel or AMD x86 processor with two or more logical cores, each with a speed of 2GHz
Network 10/100 Mbps
For best performance, use a Gigabit connection between Update Manager and the ESXi hosts
Memory 2GB RAM if Update Manager and vCenter Server are on different machines
8GB RAM if Update Manager and vCenter Server are on the same machine

Update Manager uses a SQL Server or Oracle database. You should use a dedicated database for Update Manager, not a database shared with vCenter Server, and should back up the database periodically. Best practice is to have the database on the same computer as Update Manager or on a computer in the local network.

Depending on the size of your deployment, Update Manager requires a minimum amount of free space per month for database usage. For more information about space requirements, see the VMware vSphere Update Manager Sizing Estimator.