Private Area Summary section

The optional private area summary section presents information about how a specific address space is using its private virtual storage. RMF uses the job name you specify when you request the report to identify the address space. In choosing a job, note that gathering data for a specific address space requires additional RMF overhead. Note that RMF can gather private area data only when a job is active at the beginning of the interval, and various conditions can limit RMF's ability to report complete private area data. These conditions, and the actions RMF takes, are described later in this section under Partial private area data.

In general, RMF can gather meaningful data only for jobs that run for a relatively long period of time. Note that you cannot monitor the master scheduler address space.

Note: Measuring virtual storage activity for a specific job may have significant impact on the performance of the job. When requesting a VSTOR report, system address spaces like CATALOG, VTAM, Db2, IMS or other, should be specified as jobname only for a short period of time when diagnosing a special performance situation.
Figure 1. VSTOR report - Private Area Summary
                                        V I R T U A L    S T O R A G E    A C T I V I T Y
                                                                                                                PAGE    3
           z/OS V2R4               SYSTEM ID TRX1             DATE 05/11/2019             INTERVAL 05.00.000
                                   RPT VERSION V2R4 RMF       TIME 10.35.00               CYCLE 1.000 SECONDS

                                                 PRIVATE AREA SUMMARY
         JOB NAME -       JL1LE1MS                                    REGION REQUESTED             7168K                            
         STEP NAME -      JLULE1MS                                    REGION ASSIGNED (BELOW 16M)  7168K                            
         PROGRAM NAME -   JL1LE1MS                                    REGION ASSIGNED (ABOVE 16M)  32.0M                            
         NUMBER OF SAMPLES -    11                                                                                                  
                                                                                                                                    
                                              PRIVATE STORAGE MAP                                                                   
                           BELOW 16M                              EXTENDED (ABOVE 16M)                                              
                8FFFFF ________________________                 ________________________ 7FFFFFFF                                   
                       | LSQA/SWA             |                 | LSQA/SWA             |                                            
                       | 229/230          296K|    BOTTOM OF    | 229/230         10.9M|                                            
                8B6000 |_____11.20.26_________| ALLOCATED AREA  |_____11.20.26_________| 7F513000                                   
                       | UNUSED          1664K|                 | UNUSED          1476M|                                            
                716000 |______________________|  GETMAIN LIMIT  |______________________| 23100000                                   
                       | UNUSED          7216K|                 | UNUSED          32.0M|                                            
                  A000 |_____11.20.26_________|     TOP OF      |_____11.20.26_________| 21104000                                   
                       | USER                 | ALLOCATED AREA  | USER                 |                                            
                       | REGION            16K|                 | REGION               |
                  6000 |______________________|                 |                   16K|                                            
                       | SYSTEM REGION     16K|                 |                      |                                            
                  2000 ------------------------                 ------------------------ 21100000                                   
                                                                                                                                    
                     ---------- BELOW 16M ----------------  --------------- ABOVE 16M -----------                                   
                       MIN             MAX             AVG    MIN             MAX             AVG                                   
LSQA/SWA/229/230                                                                                                                    
 FREE PAGES (BYTES)  1664K 11.20.26  1664K 11.20.26  1664K  1478M 11.20.26  1478M 11.20.26  1478M                                   
 LARGEST FREE BLOCK  1664K 11.20.26  1664K 11.20.26  1664K  1476M 11.20.26  1476M 11.20.26  1476M                                   
 PAGES ALLOCATED                                                                                                                    
  (IN BYTES)          296K 11.20.26   296K 11.20.26   296K  9600K 11.20.26  9600K 11.20.26  9600K                                   
USER REGION                                                                                                                         
 FREE PAGES (BYTES)  7216K 11.20.26  7216K 11.20.26  7216K  32.0M 11.20.26  32.0M 11.20.26  32.0M                                   
 LARGEST FREE BLOCK                                                                                                                 
   IN GETMAIN LIMIT  7216K 11.20.26  7216K 11.20.26  7216K  32.0M 11.20.26  32.0M 11.20.26  32.0M                                   
 PAGES ALLOCATED                                                                                                                    
   (IN BYTES)          16K 11.20.26    16K 11.20.26    16K    12K 11.20.26    12K 11.20.26    12K                                   
Table 1. Fields in the Virtual Storage Activity Report - Private Area Summary
Field Heading Meaning
JOBNAME and PROGRAM NAME The job analyzed in the report. RMF takes the program name from the PGM= parameter on the exec statement.
NUMBER OF SAMPLES The number of samples RMF used to generate the data in the report. If the job was swapped out at a time when RMF tried to sample virtual storage data, this number will be less than the number of samples reported for the common storage summary report.
REGION REQUESTED The values specified for the REGION= parameter on the JOB or EXEC JCL statement for the job step or the system default used for the job step.
REGION ASSIGNED The region assigned to the job by installation control for virtual storage below and above the 16-megabyte line. This value limits the amount of storage that a job can obtain by issuing a variable length GETMAIN. (When a job issues a variable length GETMAIN, the amount of storage obtained is the difference between REGION ASSIGNED and the top of the allocated area, assuming that the largest free block is there.)