Performance monitor definition requirements for initialization

About this task

The following steps are necessary for VTAM® to honor the data collection requests issued over the CNM interface:

You must define your monitor as a CNM application, and as a secondary or primary programmed operator. This authorization can be specified on the APPL definition statement for the monitor as AUTH=CNM and AUTH=SPO|PPO, respectively. Refer to z/OS Communications Server: SNA Resource Definition Reference for more information on coding the APPL definition statement.
You must open the monitor with PARMS=(PERFMON=YES) coded on the ACB macroinstruction. See Access method control block (ACB) for details about coding the ACB. Failure to properly define your monitor will result in an open ACB error code of X'8C'. See OPEN macroinstruction for details.
Upon open ACB completion, you should test bit X'51' of the access-method-support vector list (mapped by the ISTAMSVL DSECT) to verify that VTAM supports the performance monitor interface. The performance-monitor vector may also be returned in the resource-information vector list (mapped by the ISTRIVL DSECT). See The access-method-support vector list for details.

An installation-wide performance monitor exit for your monitor must also be active in order to retrieve performance data from VTAM. The exit must be coded and installed according to the requirements in z/OS Communications Server: SNA Customization.