I would ask you to inquiry about setting of 'Processes to Run in Parallel'.
Which is correct per request or per port about rule of counting the process ?
Assuming that the below requests are sent by scanner appliance as a sample,
I think that "Total processes" count as three and "HTTP processes" count as two.
Is that right?
Dest IP : Dest Port : Service : Request
10.1.1.1 : 25/tcp : STMP : HELO localhost
10.1.1.1 : 80/tcp : HTTP : HEAD / HTTP/1.0
10.1.1.1 : 80/tcp : HTTP : GET / HTTP/1.0
Setting of this event
Location: VM -> Option Profiles -> New/Edit Option Profile -> Scan -> Performance -> Configure Scan Performance Setting -> Processes in Run in Parallel (per Host)