Unbound memory usage and processes

[DEC740airp414user]

Current business edition
System- diagnostic- activity

Shows 4 processes.  All of them using 489mb of ram?

Is this normal. This seems excessive to me
Can you change options so there are only two processes?

I am running a minimal setup, forwarding dns over tls to one server
Screen whots attached hopefully

[DEC740airp414user]

Turned off forwarding and unbound. All 4 processes are using 474mb now
I changed it last night. That is what it shows this morning