Using the IWMRCOLL Service

z/OS MVS Programming: Workload Management Services

Using the IWMRCOLL Service

z/OS MVS Programming: Workload Management Services
SC34-2663-00

Using the IWMRCOLL Service

The IWMRCOLL service allows a performance monitor to obtain a variety of performance data from a single system. Although IWMRCOLL provides information about a single system, the performance monitor can combine the information to provide a sysplex view.

Table 19 shows how you can use the workload reporting services together with IWMRCOLL to get workload activity information on a single system. The following section explains how to use the information returned by IWMRCOLL.

Table 19. Using IWMRCOLL with the workload reporting services on a single system
Action	Reason
Issue REQSRMST SYSEVENT	To get information about the service definition and policy
Issue IWMPQRY macro	To obtain current active policy length
Issue GETMAIN	To obtain storage needed to hold the active service policy information
Issue IWMPQRY	To obtain active service policy information
Set up a reporting interval.	To prepare for subsequent IWMRCOLL requests
Issue IWMRCOLL specifying MINLEN, MAXLEN, and QUERYLEN	To obtain length of storage needed. IWMRCOLL returns ANSTOKN required for subsequent calls to IWMRCOLL
Issue GETMAIN	To get storage needed to hold information returned by IWMRCOLL
Issue IWMRCOLL ANSTOKN=token	To get workload activity information mapped by IWMWRCAA
Set up a reporting interval	Sample workload activity information by issuing IWMRCOLL at your determined interval
Calculate differences in data	To determine the delta of data returned for the interval in each successive IWMWRCAA

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