Increase number of Inbound Queue in SAP

Hello Experts,

I am working on SAP PI 7.4 dual stack. Interface flow is SAP >>SAP PI >> SAP. (proxy to proxy communication).

Currently in receiver SAP system, at one time max 10 queues are used to process message. I want to increase the max number of queues to 15 so that in case of bulk messages, its processed more quickly.

I have gone through the blogs but didn't get much help.

Kindly suggest how to increase number of queues in receiver SAP system.

Thanks,

Rashid