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The Cache Subsystem Summary inquiry provides subsystem level
information on caching performance. Following the subsystem
summary is an overview providing a single line of information
on each volume attached to the subsystem.
A RAID Rank Activity section follows the device overview for
each 2105 Enterprise Storage Server.
Figure 3-18 shows a sample of the output produced when the
Cache Subsystem Activity Summary report is requested. The
SAS source code used is in sharedprefix.MICS.SOURCE member:
o @RMFCAC8 - for all systems producing the SMF type 74
subtype 5 Cache Subsystem Activity record.
The CA MICS files used to generate the report are:
o HARCVA - Cache Volume Activity
o HARCCU - Cache Control Unit Activity
o HARRRA - RAID Rank Activity
Note: 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 CA 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 CA 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 on 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 CA MICS, your CA 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. ***
*************************************************************
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: 715 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--- Write 71 Read Misses 0 Write Hits 70 Write Proms 1075
Figure 3-18. Cache Subsystem Activity Summary Report (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 002 z/OS Sysplex: PLEXPROD System: SYS1 Start Date Start Time End Time Duration Release: VnRn RMF Ver: 715 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 AD00 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 AD01 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 AD02 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 AD03 0100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 --- --- --- --- MINI08 AD04 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 AD05 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 AD06 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 AD07 0100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 --- --- --- --- VM9328 AD08 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 AD09 0100 0.12 0.06 Caching Not Active VMCHI5 AD0A 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 AD0B 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 AD0C 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 AD0D 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 AD10 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 AD11 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 AD12 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 AD13 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 AD14 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
Figure 3-18. Cache Subsystem Activity Summary Report (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 003 z/OS Sysplex: PLEXPROD System: SYS1 Start Date Start Time End Time Duration Release: VnRn RMF Ver: 715 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
Figure 3-18. Cache Subsystem Activity Summary Report (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 004 z/OS Sysplex: PLEXPROD System: SYS1 Start Date Start Time End Time Duration Release: VnRn RMF Ver: 715 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
Figure 3-18. Cache Subsystem Activity Summary Report (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 005 z/OS Sysplex: PLEXPROD System: SYS1 Start Date Start Time End Time Duration Release: VnRn RMF Ver: 715 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 AE00 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 AE01 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 AE02 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 AE03 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 AE04 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 AE05 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 AE06 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 AE07 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 AE08 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 AE03 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 AE0A 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 AE0B 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 AE0C 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 AE0D 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 AE10 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 AE11 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 AE12 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
Figure 3-18. Cache Subsystem Activity Summary Report (1750 and 2107, Part 5 of 5)
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