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CA MICS Hardware and SCP Analyzer (RMF) Queries › Mainframe CPC Memory Use and Paging › RMFFRM – z/OS Central Storage Daily Frame Use by SYSID › Overview

Overview

The RMFFRM query shows how central storage 4k page frames are used for each z/OS LPAR in each Central Processing Complex (CPC). The query data extract step creates the following CSV output file:

The data extract generates the following five chart views:

  1. Daily Central Storage – Frames Available and Used
  2. Daily Central Storage – Private Frame Use
  3. Daily Central Storage – SQA and LSQA Frame Use
  4. Daily Central Storage – LPA Frame Use
  5. Daily Central Storage – CSA Frame Use

Chart view #1 displays the daily average central storage page frame usage by each category (private, SQA, CSA, etc.), for each RMF interval. This usage is shown using vertical bars, stacked by central storage frame category. A horizontal reference line shows the total central storage page frames available to the z/OS LPAR. The white space between the top of the bars and the horizontal reference line represents available central storage page frames. The first chart sample above is an example of chart view #1. It shows the daily page frame use for z/OS LPAR XAD1, running on an IBM z196 2817-615 CPC, at 15 minute intervals.

Chart view #2 displays the minimum, average, and maximum usage each interval for private fixed, and private pageable page frames using horizontal lines.

Chart view #3 displays the minimum, average, and maximum usage each interval for System Queue Area (SQA) and Local System Queue Area (LSQA) page frames using horizontal lines. The second chart sample above is an example of chart view #3, generated for the same LPAR displayed with the first chart. You can see that the SQA and LSQA frame use dropped dramatically at about 2 AM.

Chart view #4 displays the minimum, average, and maximum usage each interval for Link Pack Area (LPA) fixed and pageable page frames using horizontal lines.

Chart view #5 displays the minimum, average, and maximum usage each interval for Common Storage Area (CSA) fixed and pageable page frames using horizontal lines.