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Limited support BMC provides limited support for this version of the product. As a result, BMC no longer accepts comments in this space. If you encounter problems with the product version or the space, contact BMC Support.BMC recommends upgrading to the latest version of the product. To see documentation for that version, see BMC AMI Ops Monitor for CMF 6.3.

Cache Subsystems Overview Report

This report is produced by the CACHEACT Analyzer control statement when the REPORT= parameter is either omitted or specified as REPORT=OVERVIEW.

Use this report to see an overview of each subsystem's activity or to find out if a particular subsystem is either under- or overutilized.

By default, subsystems are ordered by subsystem ID (SSID on the report), but the order can be changed by the ORDER= parameter. The report can be filtered by cache subsystem model type or subsystem ID.

The following figure shows an example of the Cache Subsystems Overview Report. Depending on your level of PTF maintenance, select one of the following tabs:

PRODUCED BY CMF ANALYZER (v.r.mm  RSL yymm )                  CACHE SUBSYSTEMS OVERVIEW REPORT                     RPTSEQ     3 PAGE      5     
BMC SOFTWARE, INC.                                        BMC SOFTWARE, INC.                            REPORT DATE: DD MMM YY 16.44
REQD 10 JUN YY 09.50.00  10 JUN YY 10.20.00                  HOUSTON, TX.                              SYSTEM ID: SJSE     Z v.rr.n
ACTL 10 JUN YY 09.50.00  10 JUN YY 10.20.00                                                             REPORT CYCLE: CYCLE099       

BASED ON REC TYPE/# RECS/# SAMPLES/REC HOURS:  74-5/24/0/0.5                                                                         
0              CTRL        STORAGE(MB)    I/O  --CACHE HIT RATE-  --DASD I/O RATE--  ASYNC  -----% HITS------    %
 SSID   TYPE   UNIT STATUS CACHE   NVS   RATE   READ   DFW   CFW  STAGE DLNVS OTHER   RATE  TOTAL  READ WRITE  READ
 ---- -------- ---- ------ ----- -----  -----  ----- ----- -----  ----- ----- -----  -----  ----- ----- ----- -----
 A500 2107-985 A505 ACTIVE  252K 16.4K  246.9  211.7  35.0     0    0.2     0     0   10.2   99.9  99.9 100.0  85.8
 A600 2107-985 A605 ACTIVE  252K 16.4K  318.8  201.5 116.9     0    0.4     0     0   16.5   99.9  99.8 100.0  63.3
 A800 2107-985 A805 ACTIVE  252K 16.4K  348.5  333.0  14.7     0    0.8     0     0   10.9   99.8  99.7 100.0  95.8
 A900 2107-985 A9AB ACTIVE  252K 16.4K    0.8    0.8     0     0      0     0     0      0   99.6  99.6 100.0 100.0
 AA00 2107-985 AA02 ACTIVE  252K 16.4K  168.5  147.9  20.4     0    0.1     0     0    4.0   99.9  99.9 100.0  87.9
 AB00 2107-985 AB04 ACTIVE  252K 16.4K  265.7  210.6  54.0     0    1.1     0     0   13.5   99.6  99.5 100.0  79.7
 AC00 2107-985 AC25 ACTIVE  252K 16.4K  1,439  1,251 184.2     0    3.7     0     0   39.5   99.7  99.7 100.0  87.2
 AD00 2107-985 AD01 ACTIVE  252K 16.4K    1.0    1.0     0     0      0     0     0      0   97.7  97.7 100.0  99.9
 AE00 2107-985 AE02 ACTIVE  252K 16.4K  188.7  159.5  27.9     0    1.3     0     0    3.2   99.3  99.2 100.0  85.2
 AF00 2107-985 AF40 ACTIVE  252K 16.4K  103.2   44.0  58.1     0    1.0     0     0    4.2   99.1  97.9 100.0  43.6
 BC00 2107-985 BC22 ACTIVE  252K 16.4K    4.2    3.0   1.2     0      0     0     0    0.6   99.9  99.9 100.0  71.3
 BE00 2107-985 BE74 ACTIVE  252K 16.4K      0      0     0     0      0     0     0      0   98.0  98.0     0 100.0
 C000 2107-985 C056 ACTIVE  252K 16.4K   23.3   18.7   4.2     0    0.4     0     0    0.6   98.3  97.9  99.9  82.0
 C100 2107-921 C129 ACTIVE  263K   192   35.6   25.4   1.3     0    8.9     0     0    1.0   75.0  74.1  99.6  96.4
 C200 2107-921 C215 ACTIVE  263K   192   27.7   19.8   1.3     0    6.6     0     0    0.8   76.1  75.0 100.0  95.4
 C500 2107-985 C521 ACTIVE  252K 16.4K  1,873  1,537 334.4     0    1.9     0     0  132.7   99.9  99.9 100.0  82.1
 D200 2107-985 D213 ACTIVE  252K 16.4K  319.5  305.7  13.7     0    0.1     0     0    1.4  100.0 100.0 100.0  95.7
 E000 2107-985 E00D ACTIVE  252K 16.4K    0.5    0.3   0.2     0      0     0     0    0.1  100.0 100.0 100.0  64.3


1PRODUCED BY CMF ANALYZER (V.R.MM  PUT *UNK*)       CACHE SUBSYSTEMS OVERVIEW REPORT                     RPTSEQ     3 PAGE      8
 BMC Software, Inc.                                              BCM1409                                 REPORT DATE: 01 JAN 20 12.00
 ACTL 16 DEC 19 21.35.29  17 DEC 19 18.30.00             z/OS 2.4 Cache Activity                         SYSTEM ID: SJSC     Z 2.04.0


 BASED ON REC TYPE/# RECS/# SAMPLES/REC HOURS:  74-5/9,520/0/20.91
0----------------------------------- MOST ACTIVE DEVICES -- IN DESCENDING ORDER BY TOTAL I/O RATE -----------------------------------

   DEV  VOLUME  XTNT  ----STATUS---     %     I/O   -CACHE HIT RATE-  --DASD I/O RATE--  ASYNC  -------% HITS------    %
   NUM  SERIAL  POOL  CACHE  DASDFW    I/O   RATE   READ   DFW   CFW  STAGE DLNVS OTHER   RATE  TOTAL   READ  WRITE  READ
 -----  ------  ----  ------ ------  -----  -----  ----- ----- -----  ----- ----- -----  -----  -----  -----  ----- -----
 0237D  PLX002  2300  ACTIVE ACTIVE   79.9  2,483  2,462  20.9     0      0     0     0    0.1  100.0  100.0  100.0  99.2
 0ACE4  PLEX01  AC00  ACTIVE ACTIVE   37.8  544.6  531.0  13.6     0    0.1     0     0    0.9  100.0  100.0  100.0  97.5
 0C5AD  DVL307  C500  ACTIVE ACTIVE   22.0  412.7  408.6   4.0     0    0.1     0     0    1.8  100.0  100.0  100.0  99.0
 045F7  HSMC16  4500  ACTIVE ACTIVE   49.7  381.5  381.2     0     0    0.3     0     0      0   99.9   99.9  100.0 100.0
 02394  IOAA04  2300  ACTIVE ACTIVE   10.5  327.2  325.6   1.6     0      0     0     0    0.6  100.0  100.0  100.0  99.5
 045F6  HSMC15  4500  ACTIVE ACTIVE   40.7  312.5  312.1   0.1     0    0.2     0     0      0   99.9   99.9  100.0 100.0
 05F69  CAT015  5F00  ACTIVE ACTIVE   19.6  277.2  257.6  19.2     0    0.4     0     0    0.1   99.9   99.9  100.0  93.1
 0D213  QCSL03  D200  ACTIVE ACTIVE   81.4  260.1  255.8   4.3     0      0     0     0      0  100.0  100.0  100.0  98.3
 04437  SYSDBH  4400  ACTIVE ACTIVE   23.6  221.8  221.8     0     0      0     0     0      0  100.0  100.0  100.0 100.0
 085B9  SMS012  8500  ACTIVE ACTIVE   28.8  153.9    4.1 149.6     0    0.2     0     0    0.6   99.9   94.7  100.0   2.8
 028E0  DEV276  2800  ACTIVE ACTIVE   25.1  128.2   99.0  29.2     0      0     0     0    1.9  100.0  100.0  100.0  77.2
 023D0  IOAA18  2300  ACTIVE ACTIVE    3.9  122.2  114.1   8.1     0      0     0     0    0.7  100.0  100.0  100.0  93.4
 014B0  APTSQA  1400  ACTIVE ACTIVE   31.7  114.4  107.3   7.0     0      0     0     0    0.7  100.0  100.0  100.0  93.8
 0C58A  DEVS14  C500  ACTIVE ACTIVE    6.1  114.2  110.9   3.3     0      0     0     0    2.3  100.0  100.0  100.0  97.1
 0A8CA  DB2B2C  A800  ACTIVE ACTIVE   32.7  114.0  114.0     0     0      0     0     0      0  100.0  100.0   98.6 100.0
 0ACB8  DEVS37  AC00  ACTIVE ACTIVE    7.7  111.3  108.8   2.5     0      0     0     0    2.0  100.0  100.0  100.0  97.8
 0AC66  BAB300  AC00  ACTIVE ACTIVE    7.3  105.1   85.5  19.6     0    0.1     0     0    0.9   99.9   99.9  100.0  81.4
 0A623  BAB342  A600  ACTIVE ACTIVE   31.1   99.1   75.0  24.1     0      0     0     0    0.6  100.0   99.9  100.0  75.7

 ----------------------------------- MOST ACTIVE DEVICES -- IN DESCENDING ORDER BY DASD I/O RATE ------------------------------------

   DEV  VOLUME  XTNT  ----STATUS---     %     I/O   -CACHE HIT RATE-  --DASD I/O RATE--  ASYNC  -------% HITS------    %
   NUM  SERIAL  POOL  CACHE  DASDFW    I/O   RATE   READ   DFW   CFW  STAGE DLNVS OTHER   RATE  TOTAL   READ  WRITE  READ
 -----  ------  ----  ------ ------  -----  -----  ----- ----- -----  ----- ----- -----  -----  -----  -----  ----- -----
 08515  BAB351  8500  ACTIVE ACTIVE    2.8   15.0    8.2     0     0    6.8     0     0      0   54.7   54.6  100.0  99.9
 083A9  TSG317  833C  ACTIVE ACTIVE    6.9   19.5   14.4     0     0    5.1     0     0      0   73.6   73.6  100.0 100.0
 08781  BAB335  8700  ACTIVE ACTIVE   17.9   19.5   14.7   0.2     0    4.6     0     0      0   76.4   76.1   99.6  98.9
 0876B  BAB409  8700  ACTIVE ACTIVE   15.0   16.4   12.2   0.1     0    4.1     0     0    0.4   75.2   75.0  100.0  99.1
 08735  CITR38  8700  ACTIVE ACTIVE    6.4    7.0    3.4     0     0    3.6     0     0      0   48.6   48.6  100.0  99.9
 058EA  CITR23  5800  ACTIVE ACTIVE    7.3    6.9    3.4   0.1     0    3.4     0     0      0   50.6   50.1  100.0  99.0
 00C80  INFO05  0C00  ACTIVE ACTIVE   16.2   23.3   17.6   2.6     0    3.1     0     0    0.2   86.7   85.1  100.0  88.9
 085AA  BAB395  8500  ACTIVE ACTIVE    1.2    6.6    3.5   0.4     0    2.7     0     0    0.3   59.6   57.0   99.8  93.9
 085F4  BAB377  8500  ACTIVE ACTIVE    1.7    8.8    5.0   1.5     0    2.3     0     0    0.1   73.8   68.3  100.0  82.5
 085C3  BAB407  8500  ACTIVE ACTIVE    5.8   31.0   28.6   0.1     0    2.3     0     0    0.2   92.6   92.6   98.4  99.7
 083AC  TSG320  833C  ACTIVE ACTIVE    3.4    9.5    7.7     0     0    1.8     0     0      0   81.1   81.1  100.0 100.0
 08593  BAB393  8500  ACTIVE ACTIVE    0.8    4.2    2.3   0.3     0    1.6     0     0    0.2   61.6   58.8  100.0  93.1
 08203  DEVS35  8200  ACTIVE ACTIVE   14.3   15.0   12.1   1.4     0    1.5     0     0    1.8   90.2   89.2  100.0  90.4
 06122  SYS266  6100  ACTIVE ACTIVE    8.7    9.3    7.9     0     0    1.4     0     0      0   85.3   85.3  100.0 100.0
 08585  PROF00  8500  ACTIVE ACTIVE    1.2    6.6    4.7   0.6     0    1.3     0     0    0.2   79.9   78.0   99.2  91.0
 00C54  PRFB02  0C00  ACTIVE ACTIVE    4.1    5.8    4.1   0.4     0    1.3     0     0    0.2   77.6   76.0  100.0  93.5
 00DA2  SYS220  0D00  ACTIVE ACTIVE    8.2    5.9    4.7     0     0    1.2     0     0      0   79.2   79.2  100.0 100.0
 08364  BAB315  833C  ACTIVE ACTIVE    3.8   10.7    9.6     0     0    1.1     0     0      0   89.4   89.4   98.8 100.0
PRODUCED BY CMF ANALYZER (v.r.mm  RSL yymm )                  CACHE SUBSYSTEMS OVERVIEW REPORT                     RPTSEQ     3 PAGE      5     
BMC SOFTWARE, INC.                                        BMC SOFTWARE, INC.                            REPORT DATE: DD MMM YY 16.44
REQD 10 JUN YY 09.50.00  10 JUN YY 10.20.00                  HOUSTON, TX.                              SYSTEM ID: SJSE     Z v.rr.n
ACTL 10 JUN YY 09.50.00  10 JUN YY 10.20.00                                                             REPORT CYCLE: CYCLE099       

BASED ON REC TYPE/# RECS/# SAMPLES/REC HOURS:  74-5/24/0/0.5                                                                         

              CTRL        STORAGE(MB)  --I/O RATE-  --CACHE HIT RATE-  -----DASD I/O RATE-----------  ASYNC  -----% HITS------    %  
SSID    TYPE  UNIT STATUS CACHE   NVS  CACHE   OFF   READ   DFW   CFW  STAGE DFWBP   ICL   BYP OTHER   RATE  TOTAL  READ WRITE  READ
----  ------- ---- ------ ----- -----  ----- -----  ----- ----- -----  ----- ----- ----- ----- -----  -----  ----- ----- ----- -----
0027  3990-03 5590 ACTIVE 1,024     8    0.4     0    0.4     0     0      0     0     0     0     0      0   99.9  99.9     0 100.0
0140  3990-06 8350 ACTIVE 28.1K   192  640.4     0  564.1  61.1     0    9.3     0   0.2   5.7     0   18.2   97.6  98.4  99.9  90.4
0144  3990-06 8733 ACTIVE 28.1K   192  192.5     0   97.9  94.4     0    0.2     0     0     0     0      0   99.9  99.8 100.0  51.0
0240  3990-06 8573 ACTIVE 28.1K   192  340.0     0  274.7  45.0     0    7.1     0     0  13.5     0   14.4   94.0  97.6  99.3  86.2
A300  2105-20 A333 ACTIVE 4,096   192    8.1     0    2.9   5.1     0      0     0     0     0     0    1.4  100.0  99.9 100.0  36.4
AC03  2105-20 C103 ACTIVE 4,096   192   25.8     0   25.6   0.1     0      0     0     0     0     0    0.1  100.0 100.0 100.0  99.4


PRODUCED BY CMF ANALYZER (v.r.mm  RSL yymm )                  CACHE SUBSYSTEMS OVERVIEW REPORT                     RPTSEQ     3 PAGE      6     
BMC SOFTWARE, INC.                                        BMC SOFTWARE, INC.                            REPORT DATE: DD MMM YY 16.44
REQD 10 JUN YY 09.50.00  10 JUN YY 10.20.00                  HOUSTON, TX.                               SYSTEM ID: SJSE     Z v.rr.n
ACTL 10 JUN YY 09.50.00  10 JUN YY 10.20.00                                                             REPORT CYCLE: CYCLE099       

BASED ON REC TYPE/# RECS/# SAMPLES/REC HOURS:  74-5/24/0/0.5                                                                         

----------------------------------- MOST ACTIVE DEVICES -- IN DESCENDING ORDER BY TOTAL I/O RATE -----------------------------------

  DEV  VOLUME        ----STATUS---     %     I/O   -CACHE HIT RATE-  --------DASD I/O RATE--------  ASYNC  -------% HITS------     %  
  NUM  SERIAL  SSID  CACHE  DASDFW    I/O   RATE   READ   DFW   CFW  STAGE DFWBP   ICL   BYP OTHER   RATE  TOTAL   READ  WRITE   READ
-----  ------  ----  ------ ------  -----  -----  ----- ----- -----  ----- ----- ----- ----- -----  -----  -----  -----  -----  -----
08710  TSG337  0144  ACTIVE ACTIVE   87.7  168.9   84.5  84.4     0      0     0     0     0     0      0  100.0  100.0  100.0   50.0
08368  BAB319  0140  ACTIVE ACTIVE    6.9   44.4   43.8   0.1     0    0.5     0     0     0     0      0   98.9   98.9  100.0   99.7
083AE  TSG322  0140  ACTIVE ACTIVE    6.9   44.2   43.7   0.4     0      0     0     0     0     0    0.1   99.9   99.9  100.0   99.0
083AC  TSG320  0140  ACTIVE ACTIVE    4.2   27.0   26.6   0.1     0    0.2     0     0     0     0      0   99.3   99.3  100.0   99.5
083A2  TSG310  0140  ACTIVE ACTIVE    3.3   20.9   20.8     0     0    0.1     0     0     0     0      0   99.7   99.7  100.0  100.0
08525  SAZ12I  0240  ACTIVE ACTIVE    6.1   20.6   20.4     0     0    0.2     0     0     0     0      0   99.1   99.1      0  100.0
08712  TSG339  0144  ACTIVE ACTIVE   10.4   20.1   10.1  10.0     0      0     0     0     0     0      0  100.0  100.0  100.0   50.1
08526  SAZ12J  0240  ACTIVE ACTIVE    5.7   19.5   19.4     0     0      0     0     0     0     0      0   99.7   99.7      0  100.0
0C11A  SHK026  AC03  ACTIVE ACTIVE   73.5   18.9   18.9     0     0      0     0     0     0     0      0  100.0  100.0      0  100.0
085E9  TSG324  0240  ACTIVE ACTIVE    5.0   17.0   14.3   2.7     0    0.1     0     0     0     0    0.1   99.6   99.6   99.8   84.2
08552  APD282  0240  ACTIVE ACTIVE    4.7   15.9    7.8   7.6     0      0     0     0   0.5     0    0.3   96.9   99.7   99.9   50.6
08330  TSG301  0140  ACTIVE ACTIVE    2.5   15.7   14.2   0.2     0    1.3     0     0     0     0    0.1   91.5   91.5   99.1   98.8
08360  BAB311  0140  ACTIVE ACTIVE    2.2   14.1   13.9   0.2     0    0.1     0     0     0     0      0   99.5   99.4  100.0   98.9
08311  SYM030  0140  ACTIVE ACTIVE    2.1   13.7   11.0   2.7     0      0     0     0     0     0    0.1   99.8   99.9   99.7   80.6
08367  BAB318  0140  ACTIVE ACTIVE    2.0   13.1   12.9   0.1     0    0.1     0     0     0     0    0.1   99.0   99.0   99.2   99.5
08306  SYSP14  0140  ACTIVE ACTIVE    1.9   12.4   11.9   0.5     0      0     0     0     0     0    0.1   99.9   99.9  100.0   96.1
08308  SYSP15  0140  ACTIVE ACTIVE    1.9   12.2   11.9   0.3     0      0     0     0     0     0    0.1   99.7   99.7   99.8   97.9
083A0  TSG308  0140  ACTIVE ACTIVE    1.9   12.1   11.5   0.6     0      0     0     0     0     0    0.2   99.9   99.9  100.0   95.3


----------------------------------- MOST ACTIVE DEVICES -- IN DESCENDING ORDER BY DASD I/O RATE ------------------------------------

  DEV  VOLUME        ----STATUS---     %     I/O   -CACHE HIT RATE-  --------DASD I/O RATE--------  ASYNC  -------% HITS------     %  
  NUM  SERIAL  SSID  CACHE  DASDFW    I/O   RATE   READ   DFW   CFW  STAGE DFWBP   ICL   BYP OTHER   RATE  TOTAL   READ  WRITE   READ
-----  ------  ----  ------ ------  -----  -----  ----- ----- -----  ----- ----- ----- ----- -----  -----  -----  -----  -----  -----
0858C  SAEPG1  0240  ACTIVE ACTIVE    2.5    8.4    0.2   0.1     0      0     0     0   8.1     0    1.2    3.3   99.7  100.0   66.5
0833B  SAEPG2  0140  ACTIVE ACTIVE    0.4    2.3    0.1     0     0      0     0     0   2.3     0    1.6    2.5   98.1      0  100.0
0850F  SHRA06  0240  ACTIVE ACTIVE    0.6    2.1    0.3     0     0      0     0     0   1.8     0      0   16.4   99.3  100.0   96.2
08572  SANWK1  0240  ACTIVE ACTIVE    1.2    4.2    0.8   1.6     0      0     0     0   1.7     0    0.4   58.6   99.5   99.9   34.3
08330  TSG301  0140  ACTIVE ACTIVE    2.5   15.7   14.2   0.2     0    1.3     0     0     0     0    0.1   91.5   91.5   99.1   98.8
0851B  BAB303  0240  ACTIVE ACTIVE    2.6    8.9    4.9   2.8     0    0.3     0     0   0.9     0    0.1   85.9   93.9  100.0   65.3
0830B  SMFE36  0140  ACTIVE ACTIVE    0.4    2.6    0.1   1.6     0      0     0     0   0.9     0    0.9   63.1   97.8  100.0    3.1
08307  PAGF49  0140  ACTIVE ACTIVE    0.2    1.0    0.1     0     0      0     0     0   0.9     0    1.4    8.3  100.0  100.0   81.6
085C7  BAB367  0240  ACTIVE ACTIVE    1.3    4.5    3.6   0.2     0    0.7     0     0     0     0      0   84.4   83.8   99.4   96.0
085BE  SMS005  0240  ACTIVE ACTIVE    0.4    1.3    0.8     0     0    0.5     0     0     0     0      0   60.6   60.6  100.0  100.0
08552  APD282  0240  ACTIVE ACTIVE    4.7   15.9    7.8   7.6     0      0     0     0   0.5     0    0.3   96.9   99.7   99.9   50.6
08368  BAB319  0140  ACTIVE ACTIVE    6.9   44.4   43.8   0.1     0    0.5     0     0     0     0      0   98.9   98.9  100.0   99.7
085C8  BAB368  0240  ACTIVE ACTIVE    1.5    5.0    4.5   0.1     0    0.4     0     0     0     0      0   91.8   91.6   99.6   97.4
083AF  HSM300  0140  ACTIVE ACTIVE    1.6   10.0    9.3   0.4     0    0.4     0     0     0     0    0.3   96.0   95.9  100.0   96.3
083F3  FAT307  0140  ACTIVE ACTIVE    0.5    3.4    2.9   0.1     0    0.4     0     0     0     0      0   88.2   88.0  100.0   98.1
08369  BAB320  0140  ACTIVE ACTIVE    1.3    8.4    6.9   1.1     0    0.4     0     0     0     0    0.3   95.5   94.8  100.0   86.3
085C6  BAB366  0240  ACTIVE ACTIVE    1.4    4.8    4.4   0.1     0    0.4     0     0     0     0    0.1   92.6   92.5   99.2   98.6
0856C  FAT312  0240  ACTIVE ACTIVE    1.5    5.0    4.5   0.1     0    0.3     0     0     0     0    0.1   93.2   93.1  100.0   97.4

Cache Subsystems Overview Report field descriptions

The following table describes each field that is displayed in the Cache Subsystems Overview Report. Depending on your level of PTF maintenance, select one of the following tabs:


Field

Description

Overview section

SSID

Subsystem ID—a four-digit hexadecimal identifier that uniquely identifies the cache subsystem

TYPE

Cache subsystem type

CTRL UNIT

Physical control unit number of the caching subsystem; this number is equal to the lowest device number for the subsystem

STATUS

Caching status of the entire subsystem

STORAGE (MB)

Storage amounts, in megabytes:

  • CACHE— amount of storage configured for caching in the subsystem
  • NVS— amount of Non-Volatile Storage (NVS) storage in the subsystem

I/O RATE

I/O requests per second

CACHE HIT RATE

I/O requests per second that completed without accessing DASD, by type:

  • READ— number of READ requests
  • DFW— number of DFW (DASD Fast Write) requests
  • CFW— number of CFW (Cache Fast Write) requests

DASD I/O RATE

I/O requests per second that accessed DASD, by type:

  • STAGE— number of normal or sequential requests
  • DLNVS—rate of requests from delayed DFW operations. These operations are delayed due to space constraints for NVS (non-volatile storage)
  • OTHER— number of requests that were either CFW BYPASS or DFW INHIBIT requests
  • ASYNC RATE— number of tracks asynchronously written to DASD in order to release space in cache or NVS storage
    A high rate indicates storage could be overcommitted.

% HITS

I/O requests serviced from the cache, as percentages of all I/O requests:

  • TOTAL— percentage of READ and WRITE requests serviced from the cache
  • READ— percentage of READ requests serviced from the cache
  • WRITE— percentage of WRITE requests serviced from the cache

READ

READ requests as a percentage of all I/O requests

MOST ACTIVE DEVICES sections

IN DESCENDING ORDER BY TOTAL I/O RATE and BY DASD I/O RATE

DEV NUM

Five-digit device number that uniquely identifies the DASD device

VOLUME SERIAL

Volume serial number

XTNT POOL or RRID

ID of the extent pool to which the device belongs (for 2107s and 1750s only)

RAID rank identifier (for systems other than 2107s and 1750s)

STATUS


Cache status of the DASD device:

  • CACHE— caching status
  • DASDFW— DASD Fast Write (DFW) status

% I/O

I/O requests to this DASD volume, as a percentage of all I/O requests to the cache subsystem to which it belongs

I/O RATE

I/O requests per second to the volume

CACHE HIT RATE


I/O requests per second that completed without accessing DASD, by request type:

  • READ— number of READ requests
  • DFW— number of DFW (DASD Fast Write) requests
  • CFW— number of CFW (Cache Fast Write) requests

DASD I/O RATE


I/O requests per second that accessed DASD, by request type:

  • STAGE— normal or sequential requests
  • DFWBP— requests that caused DFW to be bypassed
  • OTHER— requests that were either CFW BYPASS or DFW INHIBIT requests
  • ASYNC RATE— number of tracks asynchronously written to the DASD device in order to release space in the cache or NVS storage

A high rate indicates that storage could be overcommitted.

% HITS


I/O requests serviced from the cache, as percentages of all I/O requests:

  • TOTAL— percentage of READ and WRITE requests serviced from the cache
  • READ— percentage of READ requests serviced from the cache
  • WRITE— percentage of WRITE requests serviced from the cache

READ

READ requests as a percentage of all I/O requests


Field

Description

Overview section

SSID

Subsystem ID—a four-digit hexadecimal identifier that uniquely identifies the cache subsystem

TYPE

Cache subsystem type

CTRL UNIT

Physical control unit number of the caching subsystem; this number is equal to the lowest device number for the subsystem

STATUS

Caching status of the entire subsystem

STORAGE (MB)

Storage amounts, in megabytes:

  • CACHE— amount of storage configured for caching in the subsystem
  • NVS— amount of Non-Volatile Storage (NVS) storage in the subsystem

I/O RATE

I/O requests per second, by type:

CACHE— number of cacheable I/O requests to cache devices
OFF— number of I/O requests to non-cache devices

CACHE HIT RATE

I/O requests per second that completed without accessing DASD, by type:

  • READ— number of READ requests
  • DFW— number of DFW (DASD Fast Write) requests
  • CFW— number of CFW (Cache Fast Write) requests

DASD I/O RATE

I/O requests per second that accessed DASD, by type:

  • STAGE— number of normal or sequential requests
  • DFWBP— number of requests that caused DFW to be bypassed
  • ICL— number of ICL (Inhibit Cache Load) requests
  • BYP— number of requests that explicitly bypassed the cache
  • OTHER— number of requests that were either CFW BYPASS or DFW INHIBIT requests
  • ASYNC RATE— number of tracks asynchronously written to DASD in order to release space in cache or NVS storage
    A high rate indicates storage could be overcommitted.

% HITS

I/O requests serviced from the cache, as percentages of all I/O requests:

  • TOTAL— percentage of READ and WRITE requests serviced from the cache
  • READ— percentage of READ requests serviced from the cache
  • WRITE— percentage of WRITE requests serviced from the cache

READ

READ requests as a percentage of all I/O requests

MOST ACTIVE DEVICES sections

IN DESCENDING ORDER BY TOTAL I/O RATE and BY DASD I/O RATE

DEV NUM

Five-digit device number that uniquely identifies the DASD device

VOLUME SERIAL

Volume serial number

SSID

Subsystem ID—a four-digit hexadecimal identifier that uniquely identifies the cache subsystem

STATUS


Cache status of the DASD device:

  • CACHE— caching status
  • DASDFW— DASD Fast Write (DFW) status

% I/O

I/O requests to this DASD volume, as a percentage of all I/O requests to the cache subsystem to which it belongs

I/O RATE

I/O requests per second to the volume

CACHE HIT RATE


I/O requests per second that completed without accessing DASD, by request type:

  • READ— number of READ requests
  • DFW— number of DFW (DASD Fast Write) requests
  • CFW— number of CFW (Cache Fast Write) requests

DASD I/O RATE


I/O requests per second that accessed DASD, by request type:

  • STAGE— normal or sequential requests
  • DFWBP— requests that caused DFW to be bypassed
  • ICL— ICL (Inhibit Cache Load) requests
  • BYP— requests that explicitly bypassed the cache
  • OTHER— requests that were either CFW BYPASS or DFW INHIBIT requests
  • ASYNC RATE— number of tracks asynchronously written to the DASD device in order to release space in the cache or NVS storage

A high rate indicates that storage could be overcommitted.

% HITS


I/O requests serviced from the cache, as percentages of all I/O requests:

  • TOTAL— percentage of READ and WRITE requests serviced from the cache
  • READ— percentage of READ requests serviced from the cache
  • WRITE— percentage of WRITE requests serviced from the cache

READ

READ requests as a percentage of all I/O requests


Related topics

CACHE
CACHEACT
Cache-reports

 

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CMF MONITOR 6.2