CA MICS Hardware and SCP Analyzer (RMF) Queries › WLM Service Class and Report Class Analysis › RMFS10 – z/OS Daily Top 10 Service Classes by SYSPLEX

RMFS10 – z/OS Daily Top 10 Service Classes by SYSPLEX

Overview

The RMFSVT query displays several pie charts showing a daily view of the top ten Service Class users of several important resources—CPU, I/O, and Central Storage. For the CPU usage pie chart, CP, zIIP, and zAAP CPU times are aggregated into a single metric. The metric shows total CPU utilization across all engine types.

The chart heading information shows the SYSPLEX Name, DATE, and resource unit (CPU, I/O, or Central Storage) charted. Three different data extract views are provided, each one showing the top ten users of a resource. An artificial 11th Service Class, Z_OTHER, is created and used to display the aggregated resource use for the remaining (11th through nth) Service Classes.

Note: If you want to see the top nn resource users, where nn is a number other than 10, see the Modifications documentation.

The first chart shows the top ten Service Classes consuming CPU time for the day in SYSPLEX PLEXP1. The second chart shows the top ten Service Class highest average consumers of central storage page frames.

Uses

The pie charts generated by the RMFSVT query provide a good way to identify quickly the Service Classes that dominate resource utilization across your WLM SYSPLEXES. Identifying these high use resource consumers allows you to focus performance improvement efforts where they provide the greatest return.

Data Extracts

zOS Daily Top 10 Service Class Storage

Pie Slices

SECAVCRS – Average Storage Used – CS

zOS Daily Top 10 Service Class CPU Time

Pie Slices

TOTCPU – Total CP zIIP and zAAP CPU Time

Note: TOTCPU is the sum of CP, Normalized zIIP, and Normalized zAAP CPU Times

zOS Daily Top 10 Service Class IO SUs

Pie Slices

SECTOIOC – I/O Service Units

Query Defaults

• HARCPU DAYS timespan file: Cycle 01 (used to determine CPCID)
• WLMSEC DAYS timespan file: Cycle 02
• User code only accepts yesterday’s data (IF DATEPART(ENDTS) EQ TODAY()-1 ;
• Derivations:

  CPCID

  TRIM(CPUMOD)||'-'||TRIM(CPCMODID)||'-Serial: '||SUBSTR(CPCSEQNB,12,5);
  

  DATE

  DATEPART(ENDTS);
  

  TOTCPU

  TOTCPU = SUM(SECTCPTM,SECZAPTM,SECSUPTM) ;
  

  TOTNN

  TOPNN = 10 ;
  

Modifications

The following modifications can be made to the RMFSVT query:

• You can show the top nn resource users, where nn is an integer number other than 10, by changing the value assigned to derived element TOPNN in the Input WLMSEC File step. For example, changing TOPNN=10 to TOPNN=5 creates Pie Charts that show the top five resource consuming Service Classes.
• You can input multiple cycles of the WLMSEC DAYS timespan file to see Top 10 Pie Charts for multiple days. The top ten resource users are determined independently for each unique DATE. If you do increase the number of WLMSEC DAYS timespan cycles, comment out the User Code – Select Yesterday in the Input WLMSEC File step.
• You can use filter statements in the WLMSEC File Selection step to restrict data to particular time ranges (for example, HOUR GE 8 AND HOUR LE 17) or particular time zones (for example, ZONE EQ 1).
• You can add filter statements in the WLMSEC File Selection step to select particular SYSPLEXs, CPCIDs, and/or WLMCLASSs.