RMF Cache Subsystem Activity Summary Report

The Cache Subsystem Summary inquiry provides subsystem level information about caching performance.
mics142
Following the subsystem summary is an overview providing a single line of information about each volume attached to the subsystem.
A RAID Rank Activity section follows the device overview for each 2105 Enterprise Storage Server.
The following samples show the output produced when the Cache Subsystem Activity Summary 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 Activity record.
The
MICS
files used to generate the report are:
  • HARCVA - Cache Volume Activity
  • HARCCU - Cache Control Unit Activity
  • HARRRA - RAID Rank Activity
Notes:
  • The HARCVA file is required to produce the single-line volume overview (page 2) of this 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 level report (page 1) only.
  • The HARRRA file is required to produce the Raid Rank Activity section (page 3) of this report. If you attempt to produce this report from a
    MICS
    timespan where the HARRRA file is not active, the report generator will produce a Cache Subsystem level report with device overview (pages 1 and 2) only.
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, then process these records in
MICS
, your
MICS database
will contain redundant information. To avoid unnecessary processing and excessive print volume, you can restrict your subsystem reporting to a single SYSID by coding a "%LET SELECT" statement after the //CONTROL DD * as follows:
//CONTROL DD * %LET REPORTS = CACHESUM ; %LET TSPAN = DAYS ; ... ... ... ... %LET SELECT=%STR(IF SYSID='SYS1';) ;
This SELECT statement restricts reporting to cache subsystem statistics gathered by system SYS1.
To further reduce print volume, you can restrict reporting to a particular cache subsystem. There are several ways of selecting a cache subsystem:
CCUSUBID=122, CCUSUBAD='007A', CUDEVNUM=3137, CUADDR='0C41'
These four assignment statements all refer to the same caching subsystem. SUBSYSID contains the decimal representation of subsystem ID. CCUSUBAD is a character representation of the hexadecimal value of subsystem ID. CUDEVNUM contains the decimal representation of the cache subsystem device address as known by the system that collected the data. CUADDR is a character representation of the hexadecimal value of the subsystem device address.
To enhance the SELECT statement to report only on the above subsystem, from data collected by SYS1, any of the following SELECT statements would work:
%LET SELECT=%STR(IF SYSID='SYS1' AND CCUSUBID=122;) ; %LET SELECT=%STR(IF SYSID='SYS1' AND CCUSUBAD='007A';) ; %LET SELECT=%STR(IF SYSID='SYS1' AND CUDEVNUM=3137;) ; %LET SELECT=%STR(IF SYSID='SYS1' AND CUADDR='0C41';) ;
Note:
If using a SELECT statement to subset by caching subsystem, as shown above, you cannot include any other report in the %LET REPORTS= statement. The only report selected must be either CACHESUM or CACHEDTL.

Cache Subsystem Activity Summary Report Samples

Cache Subsystem Activity Summary Report Sample (3990 and 2105, Part 1 of 5)
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: 000000059229 ================================================================================================================================== CACHE SUBSYSTEM STATUS ================================================================================================================================== Subsystem Storage Non-Volatile Storage Volumes Min Max Total Status ----------------------- --------------------- -------------------------- ------------------------------------------------ Configured 12,288 MB Configured 1,024 MB Caching 84 84 84 Caching - ACTIVE Available 11,062 MB Pinned 0 MB Inactive 0 0 0 Non-Volatile Storage - ACTIVE Pinned 0 MB Total 84 84 84 Cache Fast Write - ACTIVE Offline 0 MB IML Device Available - YES ================================================================================================================================== CACHE SUBSYSTEM OVERVIEW ================================================================================================================================== Total I/O 5936 Cache I/O 5936 Cache Offline 0 Total H/R 98.89% Cache H/R 98.89% 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 3006 1.7 2941 1.6 97.84 656 0.4 656 0.4 656 0.4 100.00 82.09 Sequential 201 0.1 200 0.1 99.50 2073 1.2 2073 1.2 2073 1.2 100.00 8.84 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 3207 1.8 3141 1.7 97.94 2729 1.5 2729 1.5 2729 1.5 100.00 54.03 -----------------------CACHE MISSES----------------------- ------------MISC------------ ------NON-CACHE I/O----- REQUESTS Read Rate Write Rate Tracks Rate Count Rate Count Rate Normal 65 0.0 0 0.0 442 0.2 DFW Bypass 0 0.0 ICL 0 0.0 Sequential 1 0.0 0 0.0 98 0.1 CFW Bypass 0 0.0 Bypass 0 0.0 CFW Data 0 0.0 0 0.0 DFW Inhibit 0 0.0 ------ ----- ------ ----- ------ ----- ------ ----- Async (Trks) 1163 0.6 Totals 0 0.0 Totals 66 0.0 0 0.0 540 0.3 ---CKD STATISTICS--- ---RECORD CACHING-- --SYNCH I/O ACTIVITY-- -HOST ADAPTER ACTIVITY- --------DISK ACTIVITY------- REQ HITS BYTES BYTES RESP BYTES BYTES WRITE 453 READ MISSES 0 /SEC /REQ /REQ /SEC TIME /REQ /SEC WRITE HITS 451 WRITE PROM 38219 READ 8.1 0.923 READ 37.9K 2.4M READ 1.700 47.9K 298.3K WRITE 0.0 0.000 WRITE 13.0K 1.0M WRITE 13.406 365.4K 837.3K
Cache Subsystem Activity Summary Report Sample (3990 and 2105, Part 2 of 5)
C A C H E S U B S Y S T E M A C T I V I T Y Page 002 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: 000000059229 ================================================================================================================================== CACHE SUBSYSTEM DEVICE OVERVIEW ================================================================================================================================== Volume Dev Rank % I/O -- Cache Hit Rate -- ---------- Dasd I/O Rate --------- Async Hit % Hit % Hit % Read % Serial Num Id I/O Rate Read DFW CFW Stage DFWBP ICL BYP OTHER Rate Total Reads Writes Of Tot *ALL 100.00 50.26 27.67 0.00 0.00 0.95 0.00 0.00 0.00 21.64 0.00 55.05 96.89 0.00 56.89 *INACT 0.12 0.06 *ACT 99.88 50.20 27.67 0.00 0.00 0.89 0.00 0.00 0.00 21.64 0.00 55.11 96.89 0.00 56.89 VMCHI3 0AD00 0100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 --- 100.00 VM9325 0AD01 0100 0.97 0.49 0.25 0.00 0.00 0.03 0.00 0.00 0.00 0.21 0.00 50.68 88.09 0.00 57.53 VM9326 0AD02 0100 4.80 2.41 2.40 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 99.58 99.58 --- 100.00 MINI06 0AD03 0100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 --- --- --- --- MINI08 0AD04 0100 4.65 2.34 0.90 0.00 0.00 0.00 0.00 0.00 0.00 1.43 0.00 38.53 100.00 0.00 38.57 SYSD01 0AD05 0100 3.17 1.59 0.18 0.00 0.00 0.00 0.00 0.00 0.00 1.41 0.00 11.04 99.37 0.00 11.11 VMCHI4 0AD06 0100 0.03 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 8.33 100.00 0.00 8.33 VM9327 0AD07 0100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 --- --- --- --- VM9328 0AD08 0100 0.12 0.06 0.04 0.00 0.00 0.02 0.00 0.00 0.00 0.00 0.00 70.91 70.91 --- 100.00 VM9329 0AD09 0100 0.12 0.06 Caching Not Active VMCHI5 0AD0A 0100 0.02 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 --- 0.00 0.00 VMCHI7 0AD0B 0100 3.31 1.66 0.65 0.00 0.00 0.08 0.00 0.00 0.00 0.94 0.00 38.89 89.25 0.00 43.57 VMCHI8 0AD0C 0100 0.08 0.04 0.00 0.00 0.00 0.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 97.37 VMU001 0AD0D 0100 11.10 5.58 5.43 0.00 0.00 0.02 0.00 0.00 0.00 0.13 0.00 97.34 99.65 0.00 97.69 VMU013 0AD10 0100 0.09 0.05 0.01 0.00 0.00 0.01 0.00 0.00 0.00 0.03 0.00 26.19 57.89 0.00 45.24 VMU002 0AD11 0100 1.06 0.53 0.07 0.00 0.00 0.08 0.00 0.00 0.00 0.39 0.00 12.29 46.09 0.00 26.67 VMU003 0AD12 0100 0.68 0.34 0.34 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00 100.00 --- 100.00 VMU004 0AD13 0100 0.91 0.46 0.44 0.00 0.00 0.01 0.00 0.00 0.00 0.01 0.00 96.11 97.30 0.00 98.79 VMU005 0AD14 0100 0.15 0.07 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.00 74.63 96.15 0.00 77.61
Cache Subsystem Activity Summary Report Sample (3990 and 2105, Part 3 of 5)
C A C H E S U B S Y S T E M A C T I V I T Y Page 003 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: 000000059229 ================================================================================================================================== RAID RANK ACTIVITY ================================================================================================================================== ID RAID DA HDD Sect -------- Read Req ------- ------- Write Req ------- ---------- Highest Utilized Volumes --------- Type Size Rate Avg MB MB/S RTime Rate Avg MB MB/S RTime *ALL 57 0.047 2.6 18 9 0.103 1.2 32 0100 RAID-5 01 7 512 57 0.047 2.6 18 9 0.103 1.2 32 VSE100 VMS001 VMU001 VMU008 VM9326 MINI08
Cache Subsystem Activity Summary Report Sample (1750 and 2107, Part 4 of 5)
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: 000000027129 ================================================================================================================================== CACHE SUBSYSTEM STATUS ================================================================================================================================== Subsystem Storage Non-Volatile Storage Volumes Min Max Total Status ----------------------- --------------------- -------------------------- ------------------------------------------------ Configured 12,288 MB Configured 1,024 MB Caching 84 84 84 Caching - ACTIVE Available 11,062 MB Pinned 0 MB Inactive 0 0 0 Non-Volatile Storage - ACTIVE Pinned 0 MB Total 84 84 84 Cache Fast Write - ACTIVE Offline 0 MB IML Device Available - YES ================================================================================================================================== CACHE SUBSYSTEM OVERVIEW ================================================================================================================================== Total I/O 39409 Cache I/O 39409 Cache Offline 0 Total H/R 99.94% Cache H/R 99.94% 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 15664 8.7 15644 8.7 99.87 8524 4.7 8524 4.7 8524 4.7 100.00 64.76 Sequential 14593 8.1 14590 8.1 99.98 628 0.3 628 0.3 628 0.3 100.00 95.87 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 30257 16.8 30234 16.8 99.92 9152 5.1 9152 5.1 9152 5.1 100.00 76.78 -----------------------CACHE MISSES----------------------- ------------MISC------------ ------NON-CACHE I/O----- REQUESTS Read Rate Write Rate Tracks Rate Count Rate Count Rate Normal 20 0.0 0 0.0 66 0.0 DFW Bypass 0 0.0 ICL 0 0.0 Sequential 3 0.0 0 0.0 29 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) 711 0.4 Totals 0 0.0 Totals 23 0.0 0 0.0 95 0.1 ---CKD STATISTICS--- ---RECORD CACHING--- ----HOST ADAPTER ACTIVITY--- --------DISK ACTIVITY------- Bytes Bytes Resp Bytes Bytes Write 29057 Read Misses 0 /Req /Sec Time /Req /Sec Write Hits 29055 Write Proms 1490 Read 505 8.5K Read 607.17 17.9K 10.0K Write 2.3K 11.8K Write 870.04 21.9K 11.1K
Cache Subsystem Activity Summary Report Sample (1750 and 2107, Part 5 of 5)
C A C H E S U B S Y S T E M A C T I V I T Y Page 005 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: 000000027129 ================================================================================================================================== CACHE SUBSYSTEM DEVICE OVERVIEW ================================================================================================================================== Volume Dev Xtnt % I/O -- Cache Hit Rate -- ---------- Dasd I/O Rate --------- Async Hit % Hit % Hit % Read % Serial Num Pool I/O Rate Read DFW CFW Stage DFWBP ICL BYP OTHER Rate Total Reads Writes Of Tot *ALL 100.00 50.26 27.67 0.00 0.00 0.95 0.00 0.00 0.00 21.64 0.00 55.05 96.89 0.00 56.89 *INACT 0.12 0.06 *ACT 99.88 50.20 27.67 0.00 0.00 0.89 0.00 0.00 0.00 21.64 0.00 55.11 96.89 0.00 56.89 TZQ@02 0AE00 0100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 --- 100.00 TZQ@03 0AE01 0100 0.97 0.49 0.25 0.00 0.00 0.03 0.00 0.00 0.00 0.21 0.00 50.68 88.09 0.00 57.53 TZQ@04 0AE02 0100 4.80 2.41 2.40 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 99.58 99.58 --- 100.00 TZQ@05 0AE03 0100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 --- --- --- --- TZQ@06 0AE04 0100 4.65 2.34 0.90 0.00 0.00 0.00 0.00 0.00 0.00 1.43 0.00 38.53 100.00 0.00 38.57 TZQ@07 0AE05 0100 3.17 1.59 0.18 0.00 0.00 0.00 0.00 0.00 0.00 1.41 0.00 11.04 99.37 0.00 11.11 TZQ@08 0AE06 0100 0.03 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 8.33 100.00 0.00 8.33 TZQ@09 0AE07 0100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 --- --- --- --- TZQ@0A 0AE08 0100 0.12 0.06 0.04 0.00 0.00 0.02 0.00 0.00 0.00 0.00 0.00 70.91 70.91 --- 100.00 TZQ@0B 0AE03 0100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 --- --- --- --- TZQ@0C 0AE0A 0100 0.02 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 --- 0.00 0.00 TZQ@0D 0AE0B 0100 3.31 1.66 0.65 0.00 0.00 0.08 0.00 0.00 0.00 0.94 0.00 38.89 89.25 0.00 43.57 TZQ@0E 0AE0C 0100 0.08 0.04 0.00 0.00 0.00 0.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 97.37 TZQ@0F 0AE0D 0100 11.10 5.58 5.43 0.00 0.00 0.02 0.00 0.00 0.00 0.13 0.00 97.34 99.65 0.00 97.69 TZQ@10 0AE10 0100 0.09 0.05 0.01 0.00 0.00 0.01 0.00 0.00 0.00 0.03 0.00 26.19 57.89 0.00 45.24 TZQ@11 0AE11 0100 1.06 0.53 0.07 0.00 0.00 0.08 0.00 0.00 0.00 0.39 0.00 12.29 46.09 0.00 26.67 TZQ@12 0AE12 0100 0.68 0.34 0.34 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00 100.00 --- 100.00