You can use IPCS reports to see how data is being shared through IARVSERV. The IPCS RSMDATA subcommand with the SHRDATA parameter provides a detailed report on the status of IARVSERV data sharing. The following RSMDATA reports also provide shared data information: ADDRSPACE, EXPFRAME, REALFRAME, RSMREQ, SUMMARY, and VIRTPAGE. See z/OS MVS IPCS Commands for more information about the SHRDATA subcommand.
You may also collect information about data shared through IARVSERV by issuing the DISPLAY command, and by specifying certain optional parameters on the IARR2V macro. See z/OS MVS System Commands and Converting a central to virtual storage address (IARR2V macro) for more information.