The onstat -g ntd option prints network statistics by service.
IBM Informix Dynamic Server Version 10.00.UC1 -- On-Line -- Up 01:57:24 -- 101376 Kbytes global network information: #netscb connects read write q-free q-limits q-exceed alloc/max 3/ 3 0 0 0 1/ 1 135/ 10 0/ 0 2/ 0 Client Type Calls Accepted Rejected Read Write sqlexec yes 6 0 0 0 srvinfx yes 0 0 0 0 onspace yes 0 0 0 0 onlog yes 0 0 0 0 onparam yes 0 0 0 0 oncheck yes 0 0 0 0 onmonitor yes 0 0 0 0 dr_accept yes 0 0 0 0 ontape yes 0 0 0 0 srvstat yes 0 0 0 0 asfecho yes 0 0 0 0 listener yes 0 0 0 0 crsamexec yes 0 0 0 0 onutil yes 0 0 0 0 Totals 6 0 0 0