Detail VMX User Consumption Report
Detail VMX User Consumption Report produces a tabular listing of summarized user resource consumption ranked by either CPU time consumed, average working set size, or virtual I/O rate.
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The ranking order is determined by a run-time execution parameter. The period of time covered by the report is also specified by the user, again as run-time execution parameters.
Intended use
To allow analysis of what sorts of workloads users are putting on the systems. It can be used, for example, to detect users who are putting an inordinate load on the system, providing the basis for further analysis. This report is useful for monitoring the resource consumption of individual LINUX guests running under z/VM.
Format
A tabular listing that contains one line of information for each user who was logged on to the system during the reporting period. In addition to the user ID, the following columns are shown on the report:
COUNT
The number of monitor intervals in which information was recorded for this user. For users running in V=V MP mode, there is a record for each virtual CPU associated with the user.
CPU USAGE TOTAL
The total CPU time charged to this user over the reporting period. This includes both time spent in emulation mode and time spent by CP on behalf of this user.
CPU USAGE VIRT
The total CPU time used by this user for productive work (in emulation mode) during the reporting period. It does not include the time spent by CP on behalf of this user.
CPU USAGE RATE
The rate of CPU usage for this user, derived as indicated below in the calculations section.
CPU USAGE VECTOR
The time during the reporting period that this user used the Vector Facility in interpretive execution mode.
WSS PAGES AVG
The average working set size, in pages, for this user during the reporting period.
WSS PAGES MAX
The maximum working set size, in pages, for this user during the reporting period.
VIRTUAL I/O TOTAL
The total number of I/O operations to virtual devices for this user during the reporting period.
VIRTUAL I/O RATE
The rate of Virtual I/O operations for this user, derived as indicated below in the calculations section.
SPOOL READS and WRITES
The total number of spool reads and writes performed by this user during the reporting period.
PAGE READS and WRITES
The total number of page reads and writes for this user during the reporting period.
An example of this report is shown in the
Detail VMX User Consumption Report
sample.Inquiry ID
- Tabular Report: VMXTX8
D
ata Source (File/Timespan):
VMXVXU01 - DETAIL
Data elements used
- USER
- - User Identification
- INTERVLS
- - Number of Recording Intervals
- VXUTTIME
- - Total CPU Time Used
- VXUVTIME
- - Virtual CPU Time Used
- VXUSPRIO
- - Spool Read I/Os Issued
- VXUSPWIO
- - Spool Write I/Os Issued
- VXUPGRIO
- - Page Read I/Os Issued
- VXUPGWIO
- - Page Write I/Os Issued
Calculations
The maximum working set size MAXWSS, is extracted from field VXUESWSS and then the various elements to be reported on are summarized across the user specified reporting period. The following computations are then performed to obtain the CPU consumption rate (CPURATE), the average working set size (AVGWSS), the Virtual I/O total (VIORATE), and the Virtual I/O rate (VIORATE):
CPURATE = VXUTTIME / DURATION; AVGWSS = VXUESWSS / INTERVLS; VIOTOTAL = SUM(VXUCONIO, VXUDASIO, VXUVURIO, VXUCTCIO, VXUMSCIO); VIORATE = VIOTOTAL / DURATION;
Usage Considerations:
None
Detail VMX User Consumption Report Sample
+----------------------------------------------------------------------------------------------------------------------------------+ | Detail VM User Consumption Reported by CPU CONSUMPTION RATE | | Product Manufacturing Corporation | | | |INQUIRY: VMXTX8 RUN DATE: 2FEByy | | System ID = VM ,Day = 21 | | C P U U S A G E WSS PAGES VIRTUAL I/O S P O O L P A G E | | ------------------------- ------------- ------------------ ----------------- ---------------- | | USERID COUNT TOTAL VIRT RATE AVG MAX TOTAL RATE READS WRITES READS WRITES | | VTAM 72 566.84 380.05 0.131 1183 1187 19 0 0 0 0 0 | | PAYROLL 12 14.30 13.89 0.021 63 150 411 1 0 0 99 121 | | USER01 72 56.30 40.24 0.013 142 162 3,121 1 1 0 129 21 | | CONTRACT 72 54.15 46.73 0.013 58 188 5,651 1 386 0 315 761 | | DOCS 72 51.98 30.00 0.012 292 396 37,576 9 428 0 2,399 2,219 | | USER06 2 0.86 0.60 0.009 114 142 411 4 6 0 0 0 | | USER02 18 8.48 7.99 0.008 59 91 340 0 0 0 145 124 | | SECURITY 72 29.71 17.44 0.007 254 358 9,116 2 4 0 335 271 | | USER03 56 22.23 20.20 0.007 77 148 6,275 2 6 0 226 455 | | CALENDAR 72 28.48 11.57 0.007 364 557 19,519 5 5 0 337 322 | | USER04 24 9.03 8.12 0.006 53 160 1,371 1 29 0 263 263 | | USER05 72 25.50 13.55 0.006 40 64 14,351 3 8 0 84 115 | | MAIL 72 25.01 7.24 0.006 115 168 13,580 3 2,336 0 215 184 | | USER100 4 1.15 0.96 0.006 85 152 117 1 0 0 0 0 | +----------------------------------------------------------------------------------------------------------------------------------+