RMFODK - z/OS System Daily Paging Analysis

The RMFODK inquiry shows paging rates for z/OS LPARs in each Central Processing Complex (CPC).
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The inquiry produces the following charts:
  • z/OS CPC Daily Paging Rate
  • z/OS System Daily Page Fault Rate
The z/OS CPC Daily Paging Rate chart shows the hourly CPC paging rate of all z/OS LPARs with the contribution with the contribution of each z/OS system shown using stacked vertical bars. The first chart sample is an example of the Daily Paging Rate chart. Here you see the hourly CPC paging rate for the z/OS LPARs running on an IBM z196 2817-715 CPC.
The second chart, z/OS System Daily Page Fault Rate, shows the hourly system, application, and overall system page rates for each z/OS LPAR. The system and application page fault rates are shown using horizontal lines, and the overall system page rate is shown using a vertical bar. The second chart sample is an example of this chart. Here you see the hourly system and application page fault rates, and the overall system paging rate for z/OS LPAR XAL1 running on an IBM z10 2097-407 CPC.
RMFODK __ zOS System Daily Paging Analysis_CPC Daily Overall Paging Rate.png
RMFODK __ zOS System Daily Overall Paging Rate and Page Fault Rate.png
Uses
Paging is essential and normal for the z/OS operating system. High per-second paging rates can indicate insufficient CPC central storage. Page faults result in workload delays. A program must wait for a page to be moved from auxiliary storage to central storage to continue executing. High page fault rates at the LPAR level can indicate insufficient central storage allocation for the LPAR.
Charts
z/OS CPC Daily Paging Rate
RMF ODK z:OS CPC Daily Paging Rate.png
Left Y-axis
PAGPSSPC
System Page Rate
X-axis
DATE HOUR
Date Hour
z/OS System Daily Page Rate and Faults
RMFODK z:OS System Daily Page Rate and Faults.png
Left Y-axis
PAGPSAPF
Application Page Fault Rate
PAGPSSPF
System Page Fault Rate
PAGPSSPC
System Page Rate
X-axis
DATE HOUR
Date Hour
Inquiry Defaults
The following are RMFODK Inquiry Defaults:
  • SCPPAG DAYS timespan file: Cycles 01 - 02
  • Filters: None
  • A Common Data Selection step selects yesterday’s data
  • Derivations
CPCID
%CPCID ;
DATE HOUR
PUT(DATEPART(ENDTS),YYMMDDD10.) || ‘:’ || PUT(HOUR,Z2.) ;
Modifications
Modification considerations:
  • If you want to see interval, rather than hourly level paging and page fault statistics, you can use the SCPPAG DETAIL timespan.
  • You can increase the number of cycles to show more than one day’s data on a single chart, but remove the step to Select Yesterday, after the SCPPAG initial file selection step that selects only yesterday’s data.
  • Using the following CPC Identification data elements you can filter on CPC:
    • fffMOD - Processor Model Family (where fff is the file identifier -- for example, CPU, LPC, and so on.)
    • CPCMODID - CPC Model Identifier
    • CPCSEQNB - CPC Sequence Number