Categorization of data
The data available through the performance monitor interface
is organized into major categories and subcategories as shown in Table 1. Typically, collection requests
are made at the major category level, with the option of specifying
multiple subcategories. Collect Performance Data CNM RUs can also
combine major category requests, with some restrictions. Stop All
Performance Data Collection CNM RU allows the monitor to stop all
collections with one request. For virtual route data requests, specification
of the resources to be controlled, or target resource set,
is specified as follows:
- A single VR (all Transmission Priorities included)
- All virtual routes to a destination subarea
- All routes.
| Subcategory code | Description |
|---|---|
| VTAM global data | |
| Environment data | Data related to this VTAM's characteristics |
| Installation-wide data | Data related to installation-wide exits |
| Storage data | Data related to this VTAM's usage of storage |
| Session data | Data related to sessions and resource definitions |
| APPN directory services data | Data related to directory services search requests |
| APPN topology data | Data related to APPN topology and route calculations |
| CSM data | Data related to the use of CSM storage and CSM buffer pools |
| Virtual route data | |
| Basic route data | Data related to individual virtual routes |
| RTP connection data | |
| Basic RTP connection data | Data related to individual RTP connections |
| Application data | |
| Application data | Data related to applications recovering from node failures, doing an MNPS planned takeover, or enabled for persistence in a sysplex that supports multinode persistent sessions |
| MNPS coupling facility structure data | |
| MNPS coupling facility structure data | Data related to the multinode persistent sessions coupling facility structure |
To minimize the overhead incurred in data gathering, monitors should limit their collections to only those subcategories of interest and stop collections once they are no longer desired. However, data can only be retrieved while a collection is in progress.