If you mean how many connections are made from IS to an Oracle DBMS, there is a DBMS connection definition that has a maximum. This will allow you to limit the number of DBMS licenses an IS will use (it does not mean that all will be used - it still means the IS load will have to require that many concurrent transactions).
The WmDB alias definition is used by WmDB (and by WmPartner via WmDB). I’m not sure if TN uses this pool or another one.
What components are you using?
#webMethods#webMethods-General#Integration-Server-and-ESB