We are planning to monitor 5000 server via CA UIM SaaS, there are 2000 windows server and 3000 linux servers.
So we need to know how many relay hub we need to monitor this environment ??
Please keep in mind that each hub can manage about 2500 robots. In your case I believe you could manage with minimum 2-3 hubs.
I hope it answers your question.
CA UIM Support