Real Storage System Usage Report

The Real Storage System Usage Report tracks the allocation of real storage frames at a monthly, weekly, daily, or hourly level. Figure 2-5 shows an example of a monthly Real Storage System Usage Report and Figure 2-6 shows the hourly form of the report. In the hourly form, data for one day is displayed by hour using the DAYS timespan of the MVS Paging Activity File (SCPPAG).
micsrm140cd
The Real Storage System Usage Report tracks the allocation of real storage frames at a monthly, weekly, daily, or hourly level. Figure 2-5 shows an example of a monthly Real Storage System Usage Report and Figure 2-6 shows the hourly form of the report. In the hourly form, data for one day is displayed by hour using the DAYS timespan of the MVS Paging Activity File (SCPPAG).
Report Options
The Real Storage System Usage Report supports standard time selection options, as well as SYSID selection and external data selection. These options are controlled by the control options discussed in RSM Component Operation.
Data Elements
The elements reported are divided into the following categories:
  • Real Storage Use
  • Real Storage Availability
  • Fixed Storage Use
  • Fixed Storage Availability
  • Auxiliary Storage Workload
  • Expanded Storage Workloa
Real Storage Use
Real storage use is shown in terms of frames allocated to the MVS nucleus, the private area, the Local System Queue Area, the Common Storage Area, and the System Queue Area.
NUCLEUS FRAMES
The size of the nucleus area, including the nucleus load module, nucleus control block (UCBs), and (for pre-MVS/XA systems) the fixed LPA and BLDL areas. This value comes from PAGFIN in the SCPPAG File.
PRIVATE FRAMES
The total frames, both pageable and fixed, that are assigned to the private areas of all MVS memories. This is PAGAVS from the
MICS
database.
LSQA FIXED FRAMES
The number of frames assigned to the Local System Queue Area (LSQA) of all MVS memories. Because LSQA is totally fixed storage, the number of LSQA frames is also the amount of virtual pages used. Therefore, you can use this value to track LSQA allocation problems. The number of LSQA frames is PAGAVLS from the
MICS
database.
CSA FRAMES
The total frames assigned to the Common Storage Area (CSA). This value is PAGAVP from the
MICS
database.
LPA FRAMES
The total frames assigned to the Pageable Link Pack Area. This value is PAGAVLP from the
MICS
database.
SQA FIXED FRAMES
The total frames assigned to the System Queue Area (SQA). Because SQA is totally fixed storage, the number of SQA frames is also the amount of virtual pages used. You can use this value to track SQA growth problems. The value is PAGAVQ from the
MICS
database.
Real Storage Availability
Real storage availability is shown in terms of the total available frames and the average number of unused frames.
FRAMES IN REAL STORAGE
The number of frames available to the system other than the nucleus frames (PAGAVTFC). Variations in this number can mean that memory has been varied offline or become unavailable.
AVAILABLE FRAME COUNT:
The average number of unused frames (the length of the ASM free queue). RMF only samples this number at the end of each measurement interval. It is included on this report as an indication of how real storage is being allocated. You should use the SCPSRCnn Files for analysis of the available frame queue. This value is PAGAVF
Fixed Storage Use
Real storage problems often arise from a growth in the amount of fixed storage, which effectively lowers the number of frames available for paging. To aid in tracking, all components of fixed storage are reported by this section of the report, even though several of the elements are reported in the first section. The pool of dynamic pages is further reduced by storage isolation. This reduction is not reflected in this report.
NUCLEUS FRAMES
Because the nucleus is fixed, it is included again in the fixed area of the report.
PRIVATE FIXED FRAMES:
The total fixed frames assigned to the private areas of all MVS memory frames. This is PAGAVR from the
MICS
database.
CSA FIXED FRAMES
The total fixed frames assigned to the Common Storage Area (CSA). This value is PAGAVC from the
MICS
database.
LSQA FIXED FRAMES
Because LSQA is fixed, the number of pages is also reported in the fixed area of the report.
SQA FIXED FRAMES
Because SQA is fixed, the number of pages is also reported in the fixed area of the report.
LPA FIXED FRAMES
The number of fixed pages assigned to the Pageable Link Pack Area (PAGAVLF).
FIXED BELOW 16 MB (XA)
The average number of real storage frames addressed between 0 and 16 MB, and marked non-pageable. This field is not valid for pre-MVS/XA systems.
Fixed Storage Availability
Fixed storage availability is reported in terms of the total number of fixed frames and the number of frames that are either free or not fixed.
TOTAL FIXED FRAMES
The total number of fixed frames over the report interval. This number is not the total of the separate pieces, as the value for each part of fixed storage is an average. This value is PAGAVX from the SCPPAG File.
TOTAL PAGEABLE FRAMES
The number of frames that are either free (on the available frame queue) or are not fixed. This number is the base frame count that ASM has to work with. However, the minimum number of storage fenced pages must also be subtracted out. This value is PAGAVT from the
MICS
database. Because of changes to RMF in MVS/SP 1.3 systems and beyond, the number of pageable frames is no longer recorded, resulting in the value for this field being the same as the FRAMES IN REAL STORAGE value.
Auxiliary Storage Workload
The workload of the page/swap subsystem is reported so that you can view the relationship between the amount of pageable storage and page/swap rates at the various report levels.
DEMAND PAGE RATE
The number of non-VIO, non-swap page-ins plus the non-VIO reclaims. This is the page fault rate (or demand page rate). This value is PAGPSDPG from the
MICS
database.
LPA PAGES PER SECOND
The number of page-ins per second for the Link Pack Area. The LPA is not modified, so there are no page-outs for it.
CSA PAGES PER SECOND:
The number of page-ins plus page-outs per second for the Common Storage Area.
MAX DEMAND PAGE RATE
The maximum observed demand paging rate over the time period (PAGMSDPG).
BLOCK IN RATE
The rate of page blocks moving in from auxiliary storage (PAGPSBLK).
PAGES PER BLOCK IN
The average number of pages per block moved. The value is:
(PAGPBLP+PAGBLK)/PAGBLK
SWAP RATE
The average number of physical swaps over the time period (PAGPSSWP).
MAX SWAP RATE
The maximum swap rate over the time period (PAGMSSWP).
PAGES PER SWAP IN
The average number of page frames involved per swap-in operation (PAGAVPSI).
TOTAL PAGES PER SECOND
The total pages moved per second by the Auxiliary Storage Manager. This includes all physical movement of pages (swapping, demand, both in and out, and block paging) but no reclaims. This number is essentially the I/O overhead of the ASM. The value is:
(PAGPIN+PAGPOUT+PAGSIN+PAGSOT+PAGVIN+ PAGVOT+PAGBLP)/DURATION
PAGES MOVED/SEC
The number of pages moved from one frame of real storage to another. For example, pages moved above or below the 16 MB line. Movements of pages to expanded or auxiliary storage are not included in this count.
VIRTUAL:REAL RATIO
The ratio of allocated local page data set slots to the number of private area fixed and pageable frames.
Expanded Storage Workload
If your system is at or above RMF version 3.3.0 and the system being reported has expanded storage, elements unique to expanded storage are included in this section.
Note:
Because of the larger memory models presented by z9xx mainframes and z/OS operating platforms, expanded storage is no longer needed. However, it is possible to configure central storage as expanded storage at IPL time to provide for compatability with previous platforms. Therefore, Performance Management will continue to support expanded storage measurements.
ONLINE ES FRAMES
The total number of online expanded storage frames: PAGOLE.
AVAILABLE ES FRAMES
The average number of unused expanded storage frames: PAGAVES.
AV PAGES TO ES RATE
The per-second rate of pages moved to expanded storage: PAGAVPES. Use in conjunction with the migrated rate to analyze thrashing of expanded storage.
AV PAGES MIGRATED RATE
The per-second rate of pages moved (migrated) from expanded storage to auxiliary storage: PAGAVPEA.
AV ES FRAMES FREED RATE
The rate of expanded storage frames being freed without being migrated: PAGPSFNM.
AV PRIM WS FR ES RATE
The average rate of primary working set migration from expanded storage to auxiliary storage: PAGPSPWS. A primary working set is the set of critical pages that must reside in central storage prior to an address space being dispatched. It consists of tables and queues, fixed pages, as well as the first page of each segment in the address space's working set.
AUX STORAGE SWAP RATE
The per-second rate of swaps to auxiliary storage data sets as derived by the following computation:
(PAGAXD+PAGLAX+PAGMIG) / DURATION
EXT STORAGE SWAP RATE
The per-second rate of swaps to expanded storage as derived by the following computation:
(PAGESD+PAGLES) / DURATION
PG RT FROM
The average number of page frames per second EXP STOR: that were moved from expanded storage to real storage due to demand activity: PAGPSRES.
VIO PAGE RT TO EXP STOR
The rate per second at which VIO pages were transferred by the real storage manager (RSM) from central storage to expanded storage: PAGPSVME.
VIO MIGR RT FROM E STOR
The rate per second at which VIO pages were : migrated from expanded storage through central storage to auxiliary storage: PAGPSVMG.
VIO PAGE RTFROM E STOR
The rate per second at which VIO pages were transferred by the real storage manager (RSM) from expanded storage to central storage: PAGPSVRE.
HIP PAGE RT TO EXP STOR
The rate per second at which hiperspace pages were transferred by the real storage manager (RSM) from central storage to expanded storage: PAGPSHME.
HIP MIGR RT FROM E STOR
The rate per second at which hiperspace pages : were migrated from expanded storage through central storage to auxiliary storage: PAGPSHMG.
HIP PAGE RT FROM E STOR
The rate per second at which hiperspace pages were transferred by the real storage manager (RSM) from expanded storage to central storage: PAGPSHRE.
AV CSA IN EXP STOR
The average number of CSA pages in expanded storage: PAGAVCSE.
AV LPA IN EXP STOR
The average number of LPA pages in expanded storage: PAGAVLPE.
AV LSQA IN EXP STOR
The average number of LSQA pages in expanded storage: PAGAVLQE.
AV REG+SWAIN EXP STOR
The average number of Region plus SWA pages in expanded storage: PAGAVRGS.
AV SQA IN EXP STOR
The average number of SQA pages in expanded storage: PAGAVSQE.
AV HIP IN EXP STOR
The average number of hiperspace pages in expanded storage: PAGAVHPX.
AV VIO IN EXP STOR
The average number of VIO pages in expanded storage: PAGAVVPX.

Real Storage System Usage Report Samples

Figure 2-5. Sample Monthly Real Storage System Usage Report (Part 1 of 2)
CA MICS Performance Manager MONTHLY REAL STORAGE SYSTEM USAGE REPORT SYSTEM = ESA1 RUNDATE = APR 4, yyyy ---------------------------------------------------------- | | | MONTHS (YY-MM): 91-02 91-03 CHANGE % | | | |--------------------------------------------------------| | | | REAL STORAGE USE | | ---------------- | | | | NUCLEUS FRAMES 686.00 686.00 --- | | PRIVATE FRAMES 2217.50 2279.37 2.79 % | | LSQA FIXED FRAMES 481.06 485.63 0.95 % | | CSA FRAMES 414.05 407.34 -1.62 % | | LPA FRAMES 1056.17 1055.01 -0.10 % | | SQA FIXED FRAMES 414.22 406.47 -1.87 % | | | |--------------------------------------------------------| | | | REAL STORAGE AVAILABILITY | | ------------------------- | | | | FRAMES IN REAL STORAGE 5406.00 5406.00 -0.00 % | | AVAILABLE FRAME COUNT 956.96 899.84 -5.96 % | | | |--------------------------------------------------------| | | | FIXED STORAGE USE | | ----------------- | | | | NUCLEUS FRAMES 686.00 686.00 --- | | PRIVATE FIXED FRAMES 100.29 109.77 9.45 % | | CSA FIXED FRAMES 15.60 15.41 -1.22 % | | LSQA FIXED FRAMES 481.06 485.63 0.95 % | | SQA FIXED FRAMES 414.22 406.47 -1.87 % | | LPA FIXED FRAMES 61.68 60.35 -2.15 % | | FIXED BELOW 16 MB (XA) 545.50 557.61 2.22 % | | | |--------------------------------------------------------| | | | FIXED STORAGE AVAILABILITY | | -------------------------- | | | | TOTAL FIXED FRAMES 1080.97 1104.54 2.18 % | | TOTAL PAGEABLE FRAMES 5406.63 5406.12 -0.00 % | | | ----------------------------------------------------------
Figure 2-5. Sample Monthly Real Storage System Usage Report (Part 2 of 2)
CA MICS Performance Manager MONTHLY REAL STORAGE SYSTEM USAGE REPORT SYSTEM = ESA1 RUNDATE = APR 4, yyyy ---------------------------------------------------------- | | | MONTHS (YY-MM): 91-02 91-03 CHANGE % | | | |--------------------------------------------------------| | | | AUXILIARY STORAGE WORKLOAD | | -------------------------- | | | | DEMAND PAGE RATE 6.28 5.88 -6.32 % | | LPA PAGES PER SECOND 0.42 0.42 --- | | CSA PAGES PER SECOND 0.90 0.90 --- | | MAX DEMAND PAGE RATE 10.46 9.97 -4.69 % | | BLOCK IN RATE 2.06 1.09 -47.09 % | | PAGES PER BLOCK IN 13.50 18.40 39.26 % | | SWAP RATE 1.02 0.96 -5.88 % | | MAX SWAP RATE 5.48 5.34 -2.55 % | | PAGES PER SWAP IN 61.04 60.82 -0.36 % | | TOTAL PAGES PER SECOND 61.00 51.22 -16.03 % | | PAGES MOVED/SEC 9.11 9.07 -0.43 % | | VIRTUAL:REAL RATIO 2.58 2.44 -5.42 % | |--------------------------------------------------------| | | | EXPANDED STORAGE WORKLOAD | | ------------------------- | | | | ONLINE ES FRAMES 6144.00 6144.00 --- | | AVAILABLE ES FRAMES 3035.50 3120.71 2.81 % | | AV PAGES TO ES RATE 1.90 1.72 -9.47 % | | AV PAGES MIGRATED RATE 0.04 0.01 -75.00 % | | AV ES FRAMES FREED RATE 0.02 0.01 -50.00 % | | AV PRIM WS FR ES RATE 0.06 0.04 -33.33 % | | AUX STORAGE SWAP RATE 0.00 0.00 N/A | | EXT STORAGE SWAP RATE 1.02 0.96 -5.88 % | | PG RT FROM EXP STOR 1.30 0.73 -43.85 % | | VIO PAGE RT TO EXP STOR 0.00 N/A | | VIO MIGR RT FROM E STOR 0.00 N/A | | VIO PAGE RT FROM E STOR 0.00 N/A | | HIP PAGE RT TO EXP STOR 0.55 0.47 -14.55 % | | HIP MIGR RT FROM E STOR 0.02 0.02 --- | | HIP PAGE RT FROM E STOR 0.53 0.51 -3.77 % | | AV CSA IN EXP STOR 31.50 35.87 13.87 % | | AV LPA IN EXP STOR 1.50 1.61 7.33 % | | AV LSQA IN EXP STOR 50.00 52.88 5.76 % | | AV REG+SWA IN EXP STOR 3083.59 2971.66 -3.62 % | | AV SQA IN EXP STOR 4.61 5.30 14.97 % | | AV HIP IN EXP STOR 6.57 9.43 45.53 % | | AV VIO IN EXP STOR 0.00 N/A | ----------------------------------------------------------
Figure 2-6. Sample Hourly Real Storage System Usage Report (Part 1 of 2)
CA MICS Performance Manager HOURLY REAL STORAGE SYSTEM USAGE REPORT SYSTEM = TA01 RUNDATE = SEP 8, yyyy ---------------------------------------------------------------------------------------------- | | | HOUR-DATE (HR-MM/DD): 09-09/06 10-09/06 11-09/06 12-09/06 13-09/06 14-09/06 CHANGE % | | | |--------------------------------------------------------------------------------------------| | | | REAL STORAGE USE | | ---------------- | | | | NUCLEUS FRAMES 533.00 533.00 533.00 533.00 533.00 533.00 --- | | PRIVATE FRAMES 4648.00 4663.50 4691.50 4601.75 4008.00 4294.25 -7.61 % | | LSQA FIXED FRAMES 743.00 819.00 828.00 800.00 746.25 814.75 9.65 % | | CSA FRAMES 561.00 563.00 522.50 435.00 446.75 447.50 -20.23 % | | LPA FRAMES 1211.00 1237.50 1198.50 1161.50 1197.00 1219.25 0.68 % | | SQA FIXED FRAMES 639.25 640.25 641.25 641.75 642.25 641.75 0.39 % | | | |--------------------------------------------------------------------------------------------| | | | REAL STORAGE AVAILABILITY | | ------------------------- | | | | FRAMES IN REAL STORAGE 7536.00 7536.00 7536.00 7536.00 7536.00 7536.00 --- | | AVAILABLE FRAME COUNT 653.50 486.00 544.25 754.00 1253.75 887.00 35.73 % | | | |--------------------------------------------------------------------------------------------| | | | FIXED STORAGE USE | | ----------------- | | | | NUCLEUS FRAMES 533.00 533.00 533.00 533.00 533.00 533.00 --- | | PRIVATE FIXED FRAMES 810.75 764.50 781.50 750.50 650.50 660.25 -18.56 % | | CSA FIXED FRAMES 54.00 54.00 54.00 53.50 53.50 53.75 -0.46 % | | LSQA FIXED FRAMES 743.00 819.00 828.00 800.00 746.25 814.75 9.65 % | | SQA FIXED FRAMES 639.25 640.25 641.25 641.75 642.25 641.75 0.39 % | | LPA FIXED FRAMES 57.00 57.00 57.00 57.00 57.00 57.00 --- | | FIXED BELOW 16 MB (XA) 1254.25 1291.50 1288.25 1209.50 1097.25 1177.75 -6.09 % | | | |--------------------------------------------------------------------------------------------| | | | FIXED STORAGE AVAILABILITY | | -------------------------- | | | | TOTAL FIXED FRAMES 2305.00 2335.25 2362.25 2303.50 2150.75 2228.75 -3.30 % | | TOTAL PAGEABLE FRAMES 7536.00 7536.00 7536.00 7536.00 7536.00 7536.00 --- | | | ----------------------------------------------------------------------------------------------
Figure 2-6. Sample Hourly Real Storage System Usage Report (Part 2 of 2)
CA MICS Performance Manager HOURLY REAL STORAGE SYSTEM USAGE REPORT SYSTEM = TA01 RUNDATE = SEP 8, yyyy ---------------------------------------------------------------------------------------------- | | | HOUR-DATE (HR-MM/DD): 09-09/06 10-09/06 11-09/06 12-09/06 13-09/06 14-09/06 CHANGE % | | | |--------------------------------------------------------------------------------------------| | | | AUXILIARY STORAGE WORKLOAD | | -------------------------- | | | | DEMAND PAGE RATE 2.00 2.85 2.48 2.22 1.49 1.74 -13.00 % | | LPA PAGES PER SECOND 0.00 0.02 0.00 0.01 0.01 0.00 N/A | | CSA PAGES PER SECOND 0.00 0.02 0.03 0.08 0.01 0.00 N/A | | MAX DEMAND PAGE RATE 3.04 3.34 3.01 2.74 2.16 1.96 -35.52 % | | BLOCK IN RATE 0.44 1.25 2.04 0.67 1.26 3.91 778.64 % | | PAGES PER BLOCK IN 12.01 9.03 9.98 11.05 10.09 9.17 -23.65 % | | SWAP RATE 0.23 0.29 0.30 0.30 0.28 0.37 60.86 % | | MAX SWAP RATE 0.30 0.33 0.32 0.33 0.34 0.42 40.00 % | | PAGES PER SWAP IN 79.83 77.56 73.65 76.20 67.95 70.14 -12.13 % | | TOTAL PAGES PER SECOND 44.43 60.59 68.39 56.43 52.75 90.26 103.15 % | | PAGES MOVED/SEC 2.62 2.67 3.92 3.78 3.87 4.17 59.16 % | | VIRTUAL:REAL RATIO 1.81 1.92 1.93 1.96 2.23 2.13 17.67 % | | | ----------------------------------------------------------------------------------------------