Patching Agents with Patch-Plans

My environment = EM 13.5, RU-08, Linux.

I have a question about Patch-Plans. When I patch agents, I typically put about 10 hosts in an individual PP. I am curious what would happen if I put many hosts, perhaps 100+ in one plan. Would EM try to run all 100 in parallel and perhaps cause my system to melt down or will it throttle the process at some point and only run a few at a time?

Is there such a limit number, what is the default and how can it be set?

Thanks.

Stephen Murphy