How many connections can one Connection Manager handle?

We need to handle about 200k idle clients, so it’s likely we should use several connection managers and one openfire server.

The problem is I donn’t know how many connection managers should I prepare.

All 200k clients are almost idle and seldom send any message.

Can anyone help? Thanks in advance.

5000 is the number before switch to MINA.

what’s the number after that?