System Monitor page is slow to load

Condition

When you click Home > Real-Time Monitoring > System Monitor, the System Monitor page takes more than twenty seconds to load if you add an external MPP or an Auxiliary EPM to the Primary EPM.

Cause

The Primary EPM is not able to resolve the host name of the external MPP or the Auxiliary EPM.

Solution

If you are using DNS, ensure that all the servers in your solution can resolve the host name of all other servers.

You can use the ping command to validate the host name resolution.
If you are using the /etc/hosts file for host name resolution, edit the /etc/hosts file of all servers in your solution.
```
127.0.0.1 localhost
192.168.1.10 prim-epm-10 pri-epm-10.test.com
192.168.1.11 aux-epm-11 aux-epm-11.test.com
192.168.1.12 ext-mpp-12 ex-mpp-12.test.com
```