Detail VMX CP Owned Volume Summary
Detail VMX CP Owned Volume Summary report produces a tabular listing of activity on CP-owned VOLSERs for the duration of the period specified in the run-time execution parameters.
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It includes those volumes that are owned by this system, and those that are shared by multiple systems in a Cross System Extensions (CSE) complex, if CSE is in use. In VM, it additionally includes those volumes that contain mapped minidisks.
Intended use
Allows analysis of page and spool activity on CP-owned volumes, including such items as average and maximum slots used, I/O activity, I/O queuing measures, and interference from user I/O. This report can be used to detect when page or spools spaces are approaching capacity, and bottlenecks due to queuing of I/O or interference from I/O activity for non-system (user) activity.
Format
A tabular report in VOLSER order where each column represents a different measurement associated with a given VOLSER:
PAGE SLOTS USED AVG
The average number of page slots in use on all paging areas defined for this volume during the reporting period
PAGE SLOTS USED %
The percentage of available page slots on the volume that the average used figure above represents
PAGE SLOTS USED MAX
The maximum number of page slots that were in use on all paging areas defined for this volume during the reporting period
PAGE SLOTS USED %
The percentage of available page slots on the volume that the maximum used figure above represents
PAGE SLOTS USED TIME
The time of day when the maximum used figure occurred
PAGE I/O READS
The total number of paging read operations to this VOLSER during the reporting period
PAGE I/O WRITES
The total number of paging write operations to this VOLSER during the reporting period
SPOOL SLOTS USED AVG
The average number of spool slots in use on all spool areas defined for this volume during the reporting period
SPOOL SLOTS USED %
The percentage of available spool slots on the volume that the average used figure above represents
SPOOL SLOTS USED MAX
The maximum number of spool slots that were in use on all spool areas defined for this volume during the reporting period
SPOOL SLOTS USED %
The percentage of available spool slots on the volume that the maximum used figure above represents
SPOOL SLOTS USED TIME
The time of day when the maximum used figure occurred
SPOOL I/O READS
The total number of spool read operations to this VOLSER during the reporting period
SPOOL I/O WRITES
The total number of spool write operations to this VOLSER during the reporting period
I/O QUEUED AVG
The average number of page/spool I/Os queued to this VOLSER during the reporting period
I/O QUEUED MAX
The maximum number of page/spool I/Os queued to this VOLSER during the reporting period
I/O QUEUED TIME
The time of day when the maximum queued figure occurred
USER I/O INTERFERENCE AVG
The average number of times per monitor interval that user I/O interfered with paging and/or spooling during the reporting period
USER I/O INTERFERENCE MAX
The maximum number of times during one monitor interval that user I/O interfered with paging and/or spooling during the reporting period
USER I/O INTERFERENCE TIME
The time of day when the maximum interference figure occurred
An example of this report is provided in the Detail VMX CP-Owned Volume Summary figure.
Inquiry ID
- Tabular Report: VMXTX3
Data Source (File/Timespan):
VMXCPV01 - DETAIL
Data elements used
- VOLSER
- - Volume Serial Number
- CPVPAGSL
- - Page Slots in Use on This Volume
- CPVPCPSU
- - Percent Spool Slots Used
- CPVPSLOT
- - Total Page Slots on This Volume
- CPVPAGRD
- - Total Page Reads
- CPVPAGWR
- - Total Page Writes
- CPVSPLSL
- - Spool Slots in Use on This Volume
- CPVPCSSU
- - Percent Page Slots Used
- CPVSSLOT
- - Total Spool Slots on This Volume
- CPVSPLRD
- - Total Spool Reads
- CPVSPLWR
- - Total Spool Writes
- CPVIOQCT
- - Page/Spool I/Os Queued or Active
- CPVUSRIO
- - User I/O Interference Count
- CPVPAGAR
- - Number of Page Areas on Volume
- CPVSPLAR
- - Number of Spool Areas on Volume
- CPVSHRD
- - CSE Shared Volume Indicator
- CPVDUMPV
- - Dump Only Volume Indicator
Calculations
As a first step, the maximum values and timestamps are pulled out of the detail data, and put into a separate file. As part of this process, the following calculations are performed for maximum percentage of page/spool used:
MAXPCPAG = 100 * MAXPAGSL / MAXPSLOT;
where MAXPAGSL is the maximum value of CPVPAGSL encountered, and MAXPSLOT was the value of CPVPSLOT at the time
MAXPCSPL = 100 * MAXSPLSL / MAXSSLOT;
where MAXSPLSL is the maximum value of CPVSPLSL encountered, and MAXSSLOT was the value of CPVSSLOT at the time
The detail data is the read again, and summarized into another file. Then the following calculations are performed:
AVGPAGSL = CPVPAGSL / INTERVLS; AVGSPLSL = CPVSPLSL / INTERVLS; AVGIOQCT = CPVIOQCT / INTERVLS; AVGUSRIO = CPVUSRIO / INTERVLS;
Usage considerations
None
Detail VMX CP-Owned Volume Summary Report Sample
---------------------------------------------------------------------------------------------------------------------------------- Detail VM CP Owned Volume Summary Product Manufacturing Corporation INQUIRY: VMXTX3 RUN DATE: 17JUNyy System ID = VM01 Date = 20APRyy P A G E S P O O L --------------------------------------------- ------------------------------------------ I / O USER I/O M S L O T S U S E D I / O S L O T S U S E D I / O Q U E U E D INTERFERENCE - --------------------------- -------------- ----------------------------- ------------ ------------- -------------- VOLSER AVG % MAX % TIME READS WRITES AVG % MAX % TIME READS WRITES AVG MAX TIME AVG MAX TIME + PAGE01 4782 15.9 5197 17.3 9:13 11612 1279836 0 0 0 0.0 0:00 0 0 0 20 8:33 0 0 0:00 + PAGE02 4459 14.9 4869 16.2 9:40 12578 1215908 0 0 0 0.0 0:00 0 0 0 17 8:49 0 0 0:00 + PAGE03 * 4014 13.4 4625 15.4 8:46 11227 1201609 0 0 0 0.0 0:00 0 0 0 19 8:57 0 0 0:00 + PAGE04 4505 15.0 5314 17.7 9:00 11944 1230269 0 0 0 0.0 0:00 0 0 0 20 8:33 0 0 0:00 + PAGE05 4045 13.5 4551 15.2 9:25 12706 1050812 0 0 0 0.0 0:00 0 0 0 0 0:00 0 0 0:00 + PAGE06 4152 13.8 4716 15.7 9:00 12440 1155316 0 0 0 0.0 0:00 0 0 0 20 8:32 0 0 0:00 * @SPOOL1 0 0 0 0.0 0:00 20 4939 25262 19.1 25557 19.3 9:02 12252 5525 0 0 0:00 0 0 0:00 * @SPOOL2 0 0 0 0.0 0:00 0 2260 8077 6.1 8395 6.3 9:35 14884 6099 0 0 0:00 0 0 0:00 + VMEPG1 40390 29.9 42093 31.2 14:45 12600 13854 0 0 0 0.0 0:00 0 0 0 5 14:49 0 0 0:00 + VMEPG2 * 46099 34.1 47551 35.2 14:45 12066 11740 0 0 0 0.0 0:00 0 0 2 24 14:33 0 1 14:29 > VMEPG3 42216 31.3 43624 32.3 14:27 14480 13333 130860 85.5 130860 85.5 14:27 0 0 0 0 0:00 0 1 14:33 + VMEPG4 38198 28.3 40000 29.6 14:53 13782 14870 0 0 0 0.0 0:00 0 0 0 1 14:37 0 0 0:00 * VMESP0 0 0 0 0.0 0:00 693 62 270023 67.4 272556 68.0 14:47 9106 10442 0 0 0:00 0 0 0:00 * VMESP1 0 0 0 0.0 0:00 43 21 141251 49.8 141995 50.1 14:45 5852 2897 0 0 0:00 23 118 14:55 * VMESP2 0 0 0 0.0 0:00 0 44 155143 38.7 163943 40.9 14:47 4912 17035 0 0 0:00 0 0 0:00 + XAPG01 2918 9.7 3729 12.4 9:41 7883 860511 0 0 0 0.0 0:00 0 0 0 15 9:05 0 0 0:00 + XAPG02 4252 14.2 4669 15.6 9:40 11250 1233626 0 0 0 0.0 0:00 0 0 0 13 9:24 0 0 0:00 + XAPG03 3665 12.2 4098 13.7 9:40 11866 999858 0 0 0 0.0 0:00 0 0 0 0 0:00 0 0 0:00 + XAPG04 3749 12.5 4405 14.7 8:45 9962 1122178 0 0 0 0.0 0:00 0 0 0 19 9:37 0 0 0:00 ---------------------------------------------------------------------------------------------------------------------------------- Column 1: * = SPOOL only, + = PAGE only, $ = no Page or Spool areas on volume 2: > = Spool space reserved for DUMP only 3: @ = CSE shared volume indicator 11: * = Mapped Minidisk(s) on volume