Is SAM going to execute the command "vxrlink -g shrilife-dg -i 2 status dc-dr" as part of PowerShell Script Monitor, or is this command executed by some other process? If SAM is executing this command then you simply need to format the output accordingly. An example of how to do this is available in the Administrators Guide.
The expected output format for the script to return is shown below as an example. Provided you can script the output in a format similar to the following, it can be monitored by SAM.
Statistic.CPU: 31.08
Message.CPU: svchost.exe cpu usage
Statistic.RAM: 1234.56
Message.RAM: svchost.exe ram usage