Release: CNMSPP99000-8.47-Unified Infrastructure Mgmt-Server Pack-- On Prem
Component:

There is no defined limit to the number of profiles \ servers that can be monitored via rsp. There are many factors that contribute to this.
We are aware of customers that have several hundred profiles configured and others who struggle with over 50.
We are also aware of one customer who monitors 2000 servers collecting CPU. Memory and Disk with no issues at all
 
What you are monitoring has a huge impact. Monitoring processes and or Event logs for example rapidly decreases the performance of the probe.
 
You have to consider if you are using a dedicated server running the RSP probe or not and what resources are available to the probe.
 
https://docops.ca.com/ca-unified-infrastructure-management-probes/ga/en/alphabetical-probe-articles/rsp-remote-system-probe/rsp-im-configuration#rspIMConfiguration-ConfigureGeneralProperties
documents that the default max number of profiles is 200
 
https://docops.ca.com/ca-unified-infrastructure-management-probes/ga/en/alphabetical-probe-articles/rsp-remote-system-probe/rsp-im-configuration#rspIMConfiguration-AddaHostProfile
notes that when configuring the discovery method for a profile there is a limit of 250 IPv4 addresses or 50 IPv6 addresses