How to increase RFC lookup calls

Hi gurus,

we are using RFC Lookup functionality in graphical mapping. We tried to send 60.000 messages every hour. But it takes ca. 30 minutes in SAP PI mapping environment. I checked the communication monitoring see that every seconds send RFC receiver communication channel 20 RFC calls to SAP.

In RFC Receiver channel i have been set the maximum connection to '30'. Shold i increase this parameter or is there another functionality?

My question is, it is possible to increase RFC lookup calls?

Kind Regards,

PM