RMF Cache Subsystem Activity Detail Report

The Cache Subsystem Activity Detail report includes all information provided by the Cache Subsystem Activity Summary Report. In addition, a report similar to the subsystem level report is provided for each device that is attached to the control unit that had caching activated over the RMF measurement interval.
mics142
The Cache Subsystem Activity Detail report includes all information provided by the Cache Subsystem Activity Summary Report. In addition, a report similar to the subsystem level report is provided for each device that is attached to the control unit that had caching activated over the RMF measurement interval.
The following samples show the output produced for each device when the Cache Subsystem Activity Detail report is requested. The SAS source code used is in sharedprefix.MICS.SOURCE member:
  • @RMFCAC8 - for all systems producing the SMF type 74 subtype 5 Cache Subsystem Device Activity record.
The
MICS
files used to generate the report are:
  • HARCVA - Cache Volume Activity
  • HARCCU - Cache Control Unit Activity
  • HARRRA - RAID Rank Activity
The HARCVA file is required to produce the Cache Detail report. If you attempt to produce this report from a
MICS
timespan where the HARCVA file is not active, the report generator will produce a Cache Subsystem overview report only.
The HARRRA file is required to produce the Cache Detail report. However, if you attempt to produce this report from a
MICS
timespan where the HARRRA file is not active, the only missing information in the Detail Report will be the RAID Rank Activity section located after the Device Overview section.
For further information about the report format and contents, see z/OS RMF Report Analysis (SC33-7991).
Usage Considerations
The information recorded in the type 74 subtype 5 cache subsystem activity record, the data source for the HARCVA Cache Device Activity, HARCCU Cache Control Unit Activity and HARRRA RAID Rank Activity files, contains total cache subsystem activity. Only one system in a shared DASD environment needs to collect this record type.
If you collect type 74 subtype 5 records with more than one system sharing a particular caching subsystem, and process these records in
MICS
, your
MICS
database will contain redundant information. To avoid unnecessary processing and excessive print volume, you can restrict your reporting to a single SYSID.
This report can be voluminous. The summary report (CACHESUM) avoids printing detailed information for each attached volume. It should be used to identify subsystems where more detail is required. Once a subsystem is identified as interesting, you can use a SELECT statement to restrict detail reporting to a particular subsystem.

Cache Subsystem Activity Detail Report Samples

Cache Subsystem Activity Detail Report Sample (3990 and 2105, Part 1 of 2)
C A C H E S U B S Y S T E M A C T I V I T Y Page 001 z/OS Sysplex: PLEXPROD System: SYS1 Start Date Start Time End Time Duration Release: VnRn RMF Ver: 794 RMF Interval: mm/dd/yyyy 0:29:00.00 0:59:00.28 0:30:00.28 Subsystem: 2105-01 CU-ID: AD10 Sub-ID: 2D00 Cache Interval: mm/dd/yyyy 0:28:44.72 0:58:44.72 0:30:00.00 Type-Model: 2105-800 Manuf: IBM Plant: 13 Serial Number: 000000027229 Volser: VMCHI3 Num: 0AD00 RRID: 0D00 ================================================================================================================================== CACHE DEVICE STATUS ================================================================================================================================== Cache Status Duplex Pair Status Caching - ACTIVE Duplex Pair - NOT ESTABLISHED DASD Fast Write - ACTIVE Status - N/A Pinned Data - NONE Dual Copy Volume - N/A ================================================================================================================================== DEVICE OVERVIEW ================================================================================================================================== Total I/O 12 Cache I/O 12 Cache Offline 0 Total H/R 100.00% Cache H/R 100.00% CACHE I/O ------------ READ I/O REQUESTS ------------- ----------------------WRITE I/O REQUESTS---------------------- % REQUESTS Count Rate Hits Rate Hit % Count Rate Fast Rate Hits Rate Hit % Read Normal 12 0.0 12 0.0 100.00 0 0.0 0 0.0 0 0.0 N/A 100.00 Sequential 0 0.0 0 0.0 N/A 0 0.0 0 0.0 0 0.0 N/A N/A CFW Data 0 0.0 0 0.0 N/A 0 0.0 N/A N/A 0 0.0 N/A N/A ------ ----- ------ ----- ------ ------ ----- ------ ----- ------ ----- ------ ------ Totals 12 0.0 12 0.0 100.00 0 0.0 0 0.0 0 0.0 N/A 100.00 -----------------------CACHE MISSES----------------------- ------------MISC------------ ------NON-CACHE I/O----- REQUESTS Read Rate Write Rate Tracks Rate Count Rate Count Rate Normal 0 0.0 0 0.0 0 0.0 DFW Bypass 0 0.0 ICL 0 0.0 Sequential 0 0.0 0 0.0 0 0.0 CFW Bypass 0 0.0 Bypass 0 0.0 CFW Data 0 0.0 0 0.0 DFW Inhibit 0 0.0 ------ ----- ------ ----- ------ ----- ------ ----- Async (Trks) 12 0.0 Totals 0 0.0 Totals 0 0.0 0 0.0 0 0.0 ---CKD STATISTICS--- ---RECORD CACHING--- Write 0 Read Misses 0 Write Hits 0 Write Proms 0
Cache Subsystem Activity Detail Report Sample (1750 and 2107, Part 2 of 2)
C A C H E S U B S Y S T E M A C T I V I T Y Page 004 z/OS Sysplex: PLEXPROD System: SYS1 Start Date Start Time End Time Duration Release: VnRn RMF Ver: 794 RMF Interval: mm/dd/yyyy 0:29:00.00 0:59:00.28 0:30:00.28 Subsystem: 2107-01 CU-ID: AE00 Sub-ID: 2E00 Cache Interval: mm/dd/yyyy 0:28:44.72 0:58:44.72 0:30:00.00 Type-Model: 2107-921 Manuf: IBM Plant: 13 Serial Number: 000000027229 Volser: TZQ@03 Num: 0AE01 Extent Pool: 0100 ================================================================================================================================== CACHE DEVICE STATUS ================================================================================================================================== Cache Status Duplex Pair Status Caching - ACTIVE Duplex Pair - NOT ESTABLISHED DASD Fast Write - ACTIVE Status - N/A Pinned Data - NONE Dual Copy Volume - N/A ================================================================================================================================== DEVICE OVERVIEW ================================================================================================================================== Total I/O 89 Cache I/O 89 Cache Offline 0 Total H/R 100.00% Cache H/R 100.00% CACHE I/O -------------READ I/O REQUESTS------------- ----------------------WRITE I/O REQUESTS---------------------- % REQUESTS Count Rate Hits Rate Hit % Count Rate Fast Rate Hits Rate Hit % Read Normal 89 0.0 89 0.0 100.00 0 0.0 0 0.0 0 0.0 N/A 100.00 Sequential 0 0.0 0 0.0 N/A 0 0.0 0 0.0 0 0.0 N/A N/A CFW Data 0 0.0 0 0.0 N/A 0 0.0 N/A N/A 0 0.0 N/A N/A ------ ----- ------ ----- ------ ------ ----- ------ ----- ------ ----- ------ ------ Totals 89 0.0 89 0.0 100.00 0 0.0 0 0.0 0 0.0 N/A 100.00 -----------------------CACHE MISSES----------------------- ------------MISC------------ ------NON-CACHE I/O----- REQUESTS Read Rate Write Rate Tracks Rate Count Rate Count Rate Normal 0 0.0 0 0.0 0 0.0 DFW Bypass 0 0.0 ICL 0 0.0 Sequential 0 0.0 0 0.0 0 0.0 CFW Bypass 0 0.0 Bypass 0 0.0 CFW Data 0 0.0 0 0.0 DFW Inhibit 0 0.0 ------ ----- ------ ----- ------ ----- ------ ----- Async (Trks) 3 0.0 Totals 0 0.0 Totals 0 0.0 0 0.0 0 0.0 ---CKD STATISTICS--- ---RECORD CACHING--- ----HOST ADAPTER ACTIVITY--- --------DISK ACTIVITY------- Bytes Bytes Resp Bytes Bytes Write 17 Read Misses 0 /Req /Sec Time /Req /Sec Write Hits 17 Write Proms 0 Read 72.4K 8.5K Read 706 131.9K 210.0K Write 69.5K 11.8K Write 870 127.2K 211.1K