sap pi 7.11 parameter messaging.connectionDefinition change

Hi the community,

we are in sap pi 7.11.

I'd like to know how to change the value of parameter messagingDefintion of service <<XPI Service: AF Core>>

in nwa , it is visible but we can't change it.

We had some issue of timeout on webservices exposed from PI and I read it is a possible bottleneck.

We want to increase the value from default value 5 to 10.

Thanks for you help.

Kind regards.

Eric Koralewski