gtps3m0k | System Performance and Measurement Reference |
Reports explained under this category include:
These are each described in this section.
These reports summarize all I/O activity except communication I/O over the life of the collection. The total number of DASD accesses, by device, are subdivided into data writes, data reads, and program reads; only writes and character counts are shown for tapes. All access data is on a per second basis except mean device queue, which is a mean of all interval snapshots taken during the collection. Tape and DASD accesses are totaled by control unit and channel as well as by system.
This number shows average data reads per weighted message, regardless of whether a physical I/O access is required.
This number shows average data writes per weighted message, including both immediate and delayed file requests. A write request to a duplicated record is counted once, although at least two physical write operations are ultimately initiated.
This number shows average ENTER requests to VFA per weighted message.
Figure 22. File Access Summary Report
FILE ACCESS SUMMARY SYSTEM WIDE 27 FEB 14:18:27 FILE PAGE 1 20 OBSERVATIONS MEAN DATA READS MEAN DATA WRITES MEAN PROGRAM READS TOTAL ACCESSES PER WEIGHTED MSG PER WEIGHTED MSG PER WEIGHTED MSG PER WEIGHTED MSG VFA ACCESSES 0.00 0.08 0.00 0.08 IMMEDIATE VFA FILES 0.08 TAPE ACCESSES 0.00 0.01 0.00 0.01 3390 ACCESSES 14.77 3.66 0.00 18.43 WEIGHTED MESSAGE RATE =( H.S.MSG IN - H.S.MSG ROUTED ) + ( L.S. * FACT) + ( H.S.MSG ROUTED * FACT2) =( 89.05 - 0.00 ) + ( 0.00 * 5.00) + ( 0.00 * 0.30) = 89.05 |
More specific information on program reads is found in DASD device statistics in the Record ID Report.
This report provides systemwide and basic subsystem counts per second of program reads, data reads, FINDs, various kinds of files, and VFA synchronization data.
VFA SUMMARY SYSTEM WIDE 2 20 APR 08:55:07 FILE PAGE 2 20 OBSERVATIONS VFA EFFICIENCY STATISTICS SYSTEM WIDE BSS SUBSYSTEM PROGRAM READS 0.00 PER SECOND 0.00 PER SECOND DATA READS 34.67 PER SECOND 34.67 PER SECOND FINDS (WITH I/O) 35.46 PER SECOND 35.46 PER SECOND CANDIDATE FILES 54.00 PER SECOND 54.00 PER SECOND FORCE FILES 3.34 PER SECOND 3.34 PER SECOND NON-CANDIDATE FILES 1.17 PER SECOND 1.17 PER SECOND FILE IMMEDIATES 48.78 PER SECOND 48.78 PER SECOND BUFFER UNAVAILABLE 0.00 PER SECOND 0.00 PER SECOND 381 BUFFER USAGE 1.50 PER SECOND 1.50 PER SECOND 1055 BUFFER USAGE 1.77 PER SECOND 1.77 PER SECOND 4K BUFFER USAGE 37.77 PER SECOND 37.77 PER SECOND VFA-S LOCK HITS 7.71 PER SECOND 7.71 PER SECOND VFA-X LOCK HITS 66.68 PER SECOND 66.68 PER SECOND VFA SYNC MISSES 40.74 PER SECOND 40.74 PER SECOND VFA SYNC CONTENTIONS 0.00 PER SECOND 0.00 PER SECOND RHT CONTENTIONS 0.00 PER SECOND 0.00 PER SECOND CACHED RHT HITS 7.77 PER SECOND 7.77 PER SECOND VFA SYNC AGE OUTS 0.00 PER SECOND 0.00 PER SECOND SIZE OF VFA 6582272 BYTES ( 6.6 MEGABYTES ) |
This report provides two types of VFA statistics:
TOT refers to total reads (physical and logical). WIO includes only physical reads and is not broken up into program reads and data reads.
The report provides:
This is the number of physical writes per second to DASD devices, including immediate file requests and page-out file operations that occur when VFA space must be freed for read requests (data reads).
This is the number of physical reads per second from DASD devices, including physical data reads and physical program reads that result from no-hit in the VFA area.
This is the maximum and minimum number of outstanding I/O requests in the queue during the data collection period. The FQ record (file queue counts for DASD devices) is used for this report. The FF record (device queues per interval) is used for plotting reports. Therefore, minimum and maximum values printed on the two different reports may not be identical. These physical reads and writes are also counted in the appropriate DASD device reports.
By using this information, you can assess whether:
Figure 24. Random File Access Summary Report
RANDOM FILE ACCESS SUMMARY BSS SUBSYSTEM 27 FEB 14:18:27 FILE PAGE 3 20 OBSERVATIONS HDWR S.M. SUB DEVICE MEAN ACCESSES PER SECOND SSCH(S) DEVICE QUEUES SERVICE ADDR NO. SYS TYPE DATA DATA PROG LOCK UNLOCK LOCK FDCTC TIME WRITES READS READS TOTAL ONLY ONLY MAX. MEAN CONTENTION COMPLETE (MILS) VFA ALL TOT 7.30 0.00 0.00 7.30 ---- ---- ---- ---- ---- ---- ---- VFA ALL WIO 7.30 0.00 ---- 7.30 ---- ---- ---- ---- ---- ---- ---- VFA BSS TOT 7.30 0.00 0.00 7.30 ---- ---- ---- ---- ---- ---- ---- VFA BSS WIO 7.30 0.00 ---- 7.30 ---- ---- ---- ---- ---- ---- ---- CHANNEL 14 CONTROL UNIT 1 141C 0066 BSS 3390 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 141D 0067 BSS 3390 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 141E 004E BSS 3390 18.75 66.77 0.00 85.52 0.86 1.47 1.00 0.04 0.00 0.00 1.33 141F 004F BSS 3390 18.68 66.45 0.00 85.13 0.78 1.28 1.00 0.04 0.00 0.00 1.22 TOTAL CONTROL UNIT 1 37.43 133.22 0.00 170.65 1.64 2.75 ---- 0.08 0.00 0.00 ---- TOTAL CHANNEL 14 37.43 133.22 0.00 170.65 1.64 2.75 ---- 0.08 0.00 0.00 ---- CHANNEL 15 CONTROL UNIT 1 151C 0050 BSS 3390 19.01 68.26 0.00 87.27 0.69 1.32 1.00 0.04 0.00 0.00 1.33 151D 005B BSS 3390 26.63 130.06 0.00 156.69 0.00 1.50 1.00 0.04 0.00 0.00 1.21 TOTAL CONTROL UNIT 1 45.64 198.32 0.00 243.96 0.69 2.82 ---- 0.08 0.00 0.00 ---- TOTAL CHANNEL 15 45.64 198.32 0.00 243.96 0.69 2.82 ---- 0.08 0.00 0.00 ---- |
The VFA efficiency summary, file access summary, and the random file access report provide a fairly clear picture of VFA activity in main and secondary storage.
The Channel Path Activity reports consists of:
These are produced when the FILE option is used. See Figure 25.
If a path is logically activated (that is, it exists), it is shown as either ENABLED if the path is available or DISABLED if the path is not available. Only CHPIDs whose status was DISABLED at the beginning or the end of data collection are included in this report. If all CHPIDs are enabled during data collection, no report is produced, and a note is added at the end of the Path Activity Per Channel Path ID Report stating that all CHPIDs were active.
Figure 25. Channel Path ID Status Exception Report
CHANNEL PATH ID STATUS SYSTEM WIDE 43 OBSERVATIONS CHANNEL PATH ID STATUS EXCEPTION REPORT SDA CHPID STATUS(START) STATUS(END) 0123 01 DISABLED DISABLED 0142 01 DISABLED DISABLED |
This is produced whenever the FILE option is used. See Figure 26.
The following information is reported for each CHPID:
Figure 26. Path Activity per Channel Path ID Report
This report is used to analyze discrepancies in channel path activity determined by the SDA percentage cutoff value (SDA_FAC) defined in JPC0. See Figure 27.
A report is produced only if the PATHACTIVITY suboption is specified and if the relative difference between access percentages (calculated as the ratio of maximum-minimum/minimum) of any CHPIDs exceeds the percentage specified by SDA_FAC.
Figure 27. SDA Activity Exception Report
SDA ACTIVITY SUMMARY SYSTEM WIDE 40 OBSERVATIONS SDA ACTIVITY EXCEPTION REPORT SDA CHPID ACCESSES% STATUS(START) STATUS(END) 04E0 25 78 ENABLED ENABLED 65 21 ENABLED ENABLED |
This report (see Figure 28) provides the same kind of information as the Random File Access Report except that sequential devices (tapes) are focused on. The number of tape writes per second, the number of characters written to tape per second, and the device queue are all reported for the various channels and control units in use.
Figure 28. Sequential File Access Report
SEQUENTIAL FILE ACCESS SUMMARY SYSTEM WIDE 27 FEB 14:18:27 FILE PAGE 10 20 OBSERVATIONS HDWR. TAPE SUBSYSTEM TAPE WRITES CHAR TO TAPE DEVICE ADDR. NAME NAME PER SECOND PER SECOND QUEUE MAX. MIN. MEAN MAX. MIN. MEAN MAX. MEAN CHANNEL F CONTROL UNIT 1 F11 RTA BSS 0.00 0.00 0.00 0 0 0.00 0 0 F12 RTC BSS 1.20 1.19 1.20 4945 4928 4935.20 0 0 TOTAL CONTROL UNIT 1 ------ ------ 1.20 ----- ----- 4935.00 ----- ----- TOTAL CHANNEL F ------ ------ 1.20 ----- ----- 4935.00 ----- ----- TOTAL SYSTEM ------ ------ 1.20 ----- ----- 4935.00 ----- ----- |
The Record ID report (see Figure 29) can be produced for the system or by module number. The IDs are listed in alphabetic order after the two characters that represent program accesses. The level of activity against each record ID can be readily observed. The most active record IDs should always be allocated to cylinders near the midpoint of movable head files to reduce seek time. Unusual shifts in record ID activity can often be traced to a change in the input message mix.
FILE ACCESSES PER RECORD ID BSS SUBSYSTEM 27 FEB 14:18:27 FILE PAGE 202 20 OBSERVATIONS VFA SUMMARY ACCESS COUNTS PERCENT ACCESSES RECORD I.D. SYNC READS WRITES IMMEDIATE DELAYED DFW CFWS CFWD RETENTIVE BYPASS OF TOTAL PER SECOND X'00E0' 0 1 0.06 0.50 CD,X'C3C4' 0 1 0.06 0.50 E5,X'C5F5' 11 19 1.83 29.51 E6,X'C5F6' 19 10 1.77 28.51 E7,X'C5F7' 18 15 2.01 32.51 F6,X'C6F6' 11 12 1.40 22.51 GL,X'C7D3' 9 15 1.46 23.51 GS,X'C7E2' 1222 161 84.28 1383.11 G7,X'C7F7' 17 10 1.65 26.51 LD,X'D3C4' 18 13 1.89 30.51 OM,X'D6D4' 0 2 0.12 1.50 SD,X'E2C4' 19 7 1.58 25.51 YC,X'E8C3' 0 13 0.79 12.51 YD,X'E8C4' 0 18 1.10 17.51 TOTALS** 1344 297 99.99 1641.22 LEGEND: 'PROGRAM' I.D. = FILE ACCESSES DUE TO ENTERS, AND 'OVERFLOW' I.D. = OVERFLOW FILE ACCESSES DUE TO FINDS/FILES ALL OTHER I.D.'S PRINTED AS XX,X'XXXX', BOTH CHARACTER AND HEX REPRESENTATIONS NOTE: DFW = DASD FAST WRITE, CFWS = CACHE FAST WRITE SIMPLEX, CFWD = CACHE FAST WRITE DUPLEX |
The Cylinder Analysis Report (see Figure 30) can be produced for SYS, sum, or individual module numbers. SYS produces a report for each DASD device in the system, which can be correlated with the Record ID report to determine whether or not the most active records have been grouped around the center of the module. Arm movement analysis is included in this report. Arm movement of a particular module is calculated by using the following formula:
E(X) = P(i) * P(j) * |i-j| for every i,j from 0 to N
where:
Figure 30. Cylinder Analysis Report
FILE ACCESSES PER CYLINDER BSS SUBSYSTEM 40 OBSERVATIONS DEVICE 04E0 MODULE CYLINDER ACCESSES 13 2 34 1 47 2 50 2 54 1 61 2 65 1 66 1 147 2 TOTAL 14 THE EXPECTED ARM MOVEMENT IS : 37.97 CYLINDERS |
This report provides a way of comparing the total file access per second for each device type. It provides a concise summary in plot format of the average accesses per second for all devices in the system by device type. There is a section in this report for DASD devices. System load balancing is more feasible with this information.
Figure 31. File Comparison Plot
FILE COMPARISON PLOT BSS SUBSYSTEM 27 FEB 14:18:27 FILE PAGE 11 20 OBSERVATIONS HDWR SUB S.M. DEVICE TYPE AXIS INCR ADDR SYS NO. 3390 1. 141C BSS 0066 . 141D BSS 0067 . 141E BSS 004E .*********************************************************************** 141F BSS 004F .*********************************************************************** 151C BSS 0050 .************************************************************************* 151D BSS 005B .**************************************************************************************************** 156 161C BSS 006C . 161D BSS 005D .**************************************************************************************************** 157 161E BSS 005E .**************************************************************************************************** 157 161F BSS 0058 .*** 171C BSS 005F .**************************************************************************************************** 156 171D BSS 0065 . 171E BSS 0051 .*** 181C BSS 004C .************************************************************************ 181D BSS 004D .*********************************************************************** 181E BSS 006B . 181F BSS 0060 . 191C BSS 005C .**************************************************************************************************** 156 191D BSS 0048 .*********************************************************************** 191E BSS 0063 . 191F BSS 0072 . 201C BSS 0047 .******************************************************************** 201D BSS 006D . 201E BSS 0049 .*********************************************************************** 211C BSS 004A .************************************************************************ 211D BSS 004B .********************************************************************** 211E BSS 0068 . |.........|.........|.........|.........|.........|.........|.........|.........|.........|.........| 0.00 12 24 36 48 60 72 84 96 108 120 MEAN TOTAL ACCESSES PER SECOND |
The Storage Control reports are primarily concerned with the record caching performed by certain 3880 and 3990 storage controls. The 3880 storage controls are reported on from the point of view of the individual storage director, while the 3990 storage controls are reported on from the point of view of the individual cache subsystem. This is due to differences in storage control organization: each 3880 storage director has its own record cache, but each 3990 cache subsystem has a record cache that is shared by the storage directors in the cache subsystem.
There are three 3880 storage control reports with essentially the same format. These reports differ with respect to degree of summarization: one contains totals for all of the 3880 storage directors, another contains subtotals for a specific 3880 storage director, and the third contains statistics for a specific DASD backing a specific 3880 storage director.
The data for the 3880 storage control reports is collected from the results of the Sense Subsystem Counts command.
This report contains totals for all of the active 3880 storage directors (see Figure 32).
Figure 32. 3880 Storage Control Report: Totals
This report contains subtotals for a specific active 3880 storage director (see Figure 33).
Figure 33. 3880 Storage Control Report: Subtotals for SDID nn
This report contains statistics for a specific active DASD backing a specific 3880 storage director (see Figure 34).
Figure 34. 3880 Storage Control Report for SDA mmmm, SDID nn
There are five 3990 storage control reports in two categories: full reports and summary reports.
There are three full reports, each several pages long. The first few pages of the full reports all have essentially the same format. They only differ in what they summarize: one contains totals for all of the 3990 cache subsystems, another contains subtotals for a specific 3990 cache subsystem, and the third contains statistics for a specific DASD backing a specific 3990 cache subsystem. The subsequent pages of the reports in this category are composed of different groups of the following types of information:
The two summary reports are about one page long. Both reports have essentially the same format. They also differ to the degree they summarize: one contains a column of totals for all of the 3990 cache subsystems, and a column of subtotals for each 3990 cache subsystem; the other contains a column of totals for all of the 3990 cache subsystems, a column of subtotals for a specific 3990 cache subsystem, and a column of statistics for each of the DASDs backing the 3990 cache subsystem.
The data for the 3990 Storage Control reports are collected from the results of the Sense Subsystem Status, Read Allocation Data, and Read Subsystem Statistics commands.
This report contains totals for all of the active 3990 cache subsystems (see Figure 35 and Figure 36).
Figure 35. 3990 Storage Control Report: Totals (Part 1)
3990 STORAGE CONTROL REPORT: TOTALS (PART 1) COMPLEXWIDE 27 FEB 14:18:27 FILE PAGE 205 TOTALS 381-BYTE SLOTS 1055-BYTE SLOTS 4096-BYTE SLOTS ---------------------- ---------------------- ---------------------- ---------------------- CATEGORY COUNT RATE (*) COUNT RATE (*) COUNT RATE (*) COUNT RATE (*) -------------------------- ---------- ----------- ---------- ----------- ---------- ----------- ---------- ----------- READS PER WRITE 4.02 0.00 4.02 0.00 READS 603784 1315.43 0 0.00 603784 1315.43 0 0.00 CFW READS 603784 1315.43 0 0.00 603784 1315.43 0 0.00 NORMAL READS 0 0.00 0 0.00 0 0.00 0 0.00 READ HITS 603784 1315.43 0 0.00 603784 1315.43 0 0.00 CFW READ HITS 603784 1315.43 0 0.00 603784 1315.43 0 0.00 NORMAL READ HITS 0 0.00 0 0.00 0 0.00 0 0.00 READ HIT PERCENTAGE 100.00 0.00 100.00 0.00 CFW READ HITS 100.00 0.00 100.00 0.00 NORMAL READ HITS 0.00 0.00 0.00 0.00 WRITES 150041 326.89 0 0.00 150041 326.89 0 0.00 CFW WRITES 128558 280.08 0 0.00 128558 280.08 0 0.00 NORMAL WRITES 21483 46.80 0 0.00 21483 46.80 0 0.00 RETENTIVE WRITES 0 0.00 0 0.00 0 0.00 0 0.00 DFW WRITES 21483 46.80 0 0.00 21483 46.80 0 0.00 DFW BYPASSES 0 0.00 0 0.00 0 0.00 0 0.00 WRITE HITS 150000 326.80 0 0.00 150000 326.80 0 0.00 CFW WRITE HITS 128558 280.08 0 0.00 128558 280.08 0 0.00 HIT PERCENTAGE 100.00 0.00 100.00 0.00 DFW WRITE HITS (NVS) 21442 46.71 0 0.00 21442 46.71 0 0.00 NVS HIT PERCENTAGE 99.81 0.00 99.81 0.00 READS AND WRITES 753825 1642.32 0 0.00 753825 1642.32 0 0.00 DESTAGE OPERATIONS 0 0.00 0 0.00 0 0.00 0 0.00 DESTAGE PERCENTAGE 0.00 0.00 0.00 0.00 CAPTURE CHAINS 0 0.00 CAPTURE CHAIN HITS 0 0.00 HIT PERCENTAGE 0.00 RESTORE CHAINS 0 0.00 TOTAL BYPASS CACHE CHAINS 0 0.00 BAD READS AND WRITES 0 0.00 ==================================================================================================================================== NOTE: THE RATE COLUMN ALSO CONTAINS PERCENTAGES AND RATIOS NOTE: THESE TOTALS ARE FOR 27 DASD BACKING 8 CACHE SUBSYSTEMS |
Figure 36. 3990 Storage Control Report: Totals (Part 2)
3990 STORAGE CONTROL REPORT: TOTALS (PART 2) COMPLEXWIDE 27 FEB 14:18:27 FILE PAGE 206 CACHE SHAPE CURRENT IML NEXT IML ------------ ------------ SLOTS SIZE PERCENT SIZE PERCENT ---------- ---- ------- ---- ------- FULL TRACK 25.00 25.00 RECORD 1 381 25.00 381 25.00 RECORD 2 1055 25.00 1055 25.00 RECORD 3 4096 25.00 4096 25.00 LOCKING CATEGORY CURRENT IML NEXT IML SOE EOE ---------------------- ----------- ----------- ----------- ----------- LOCKS ALLOCATED 131072 0 LOCKS IN USE 5 4 PERCENTAGE IN USE *.** *.** RAN OUT OF LOCKS? NO ==================================================================================================================================== NOTE: SOE = START OF (DATA COLLECTION) EPISODE, EOE = END OF EPISODE |
This report contains subtotals for a specific active 3990 cache subsystem (see Figure 37, Figure 38 and Figure 39).
Figure 37. 3990 Storage Control Report: Subtotals for Cache Subsystem nnnn (Part 1)
3990 STORAGE CONTROL REPORT: SUBTOTALS FOR CACHE SUBSYSTEM 6207 (PART 1) COMPLEXWIDE 27 FEB 14:18:27 FILE PAGE 207 TOTALS 381-BYTE SLOTS 1055-BYTE SLOTS 4096-BYTE SLOTS ---------------------- ---------------------- ---------------------- ---------------------- CATEGORY COUNT RATE (*) COUNT RATE (*) COUNT RATE (*) COUNT RATE (*) -------------------------- ---------- ----------- ---------- ----------- ---------- ----------- ---------- ----------- READS PER WRITE 3.52 0.00 3.52 0.00 READS 59687 130.04 0 0.00 59687 130.04 0 0.00 CFW READS 59687 130.04 0 0.00 59687 130.04 0 0.00 NORMAL READS 0 0.00 0 0.00 0 0.00 0 0.00 READ HITS 59687 130.04 0 0.00 59687 130.04 0 0.00 CFW READ HITS 59687 130.04 0 0.00 59687 130.04 0 0.00 NORMAL READ HITS 0 0.00 0 0.00 0 0.00 0 0.00 READ HIT PERCENTAGE 100.00 0.00 100.00 0.00 CFW READ HITS 100.00 0.00 100.00 0.00 NORMAL READ HITS 0.00 0.00 0.00 0.00 WRITES 16955 36.94 0 0.00 16955 36.94 0 0.00 CFW WRITES 13221 28.80 0 0.00 13221 28.80 0 0.00 NORMAL WRITES 3734 8.13 0 0.00 3734 8.13 0 0.00 RETENTIVE WRITES 0 0.00 0 0.00 0 0.00 0 0.00 DFW WRITES 3734 8.13 0 0.00 3734 8.13 0 0.00 DFW BYPASSES 0 0.00 0 0.00 0 0.00 0 0.00 WRITE HITS 16955 36.94 0 0.00 16955 36.94 0 0.00 CFW WRITE HITS 13221 28.80 0 0.00 13221 28.80 0 0.00 HIT PERCENTAGE 100.00 0.00 100.00 0.00 DFW WRITE HITS (NVS) 3734 8.13 0 0.00 3734 8.13 0 0.00 NVS HIT PERCENTAGE 100.00 0.00 100.00 0.00 READS AND WRITES 76642 166.98 0 0.00 76642 166.98 0 0.00 DESTAGE OPERATIONS 0 0.00 0 0.00 0 0.00 0 0.00 DESTAGE PERCENTAGE 0.00 0.00 0.00 0.00 CAPTURE CHAINS 0 0.00 CAPTURE CHAIN HITS 0 0.00 HIT PERCENTAGE 0.00 RESTORE CHAINS 0 0.00 TOTAL BYPASS CACHE CHAINS 0 0.00 BAD READS AND WRITES 0 0.00 ==================================================================================================================================== NOTE: THE RATE COLUMN ALSO CONTAINS PERCENTAGES AND RATIOS NOTE: THESE SUBTOTALS ARE FOR 3 DASD |
Figure 38. 3990 Storage Control Report: Subtotals for Cache Subsystem mmmm (Part 2)
3990 STORAGE CONTROL REPORT: SUBTOTALS FOR CACHE SUBSYSTEM 6207 (PART 2) COMPLEXWIDE 27 FEB 14:18:27 FILE PAGE 208 CACHE STATUS CATEGORY SOE EOE PROTOTYPE ------------------------------ --- --- --------- CACHING ACTIVE YES YES 000. .... CACHE COMING ONLINE NO NO 001. .... CACHING FAILED NO NO 010. .... UNDEFINED NO NO 011. .... CACHING DEACTIVATED NO NO 100. .... CACHING SUSPENDED NO NO 101. .... DESTAGING IN PROGRESS NO NO 110. .... DESTAGING FAILED NO NO 111. .... CACHE DISABLED FOR MAINTENANCE NO NO ...1 .... UNDEFINED NO NO .... 1... UNDEFINED NO NO .... .1.. IML DEVICE UNAVAILABLE NO NO .... ..1. CACHE-FAST-WRITE DEACTIVATED NO NO .... ...1 NVS STATUS CATEGORY SOE EOE PROTOTYPE ---------------------------- --- --- --------- NVS ACTIVE YES YES 00.. .... NVS FAILED NO NO 01.. .... NVS UNAVAILABLE NO NO 10.. .... NVS PENDING NO NO 11.. .... UNDEFINED NO NO ..1. .... NVS DISABLED FOR MAINTENANCE NO NO ...1 .... NVS PENDING DUE TO ERROR NO NO .... 1... UNDEFINED NO NO .... .1.. UNDEFINED NO NO .... ..1. UNDEFINED NO NO .... ...1 CACHE CAPACITY START OF EPISODE END OF EPISODE ------------------ ------------------ CATEGORY IML AMOUNT AMOUNT PERCENT AMOUNT PERCENT ---------- ---------- ---------- ------- ---------- ------- CONFIGURED 1073741824 AVAILABLE 1069498368 99.60 1069498368 99.60 PINNED 0 0.00 0 0.00 OFFLINE 0 0.00 0 0.00 NVS CAPACITY START OF EPISODE END OF EPISODE ------------------ ------------------ CATEGORY IML AMOUNT AMOUNT PERCENT AMOUNT PERCENT ---------- ---------- ---------- ------- ---------- ------- CONFIGURED 16777216 PINNED 0 0.00 0 0.00 ==================================================================================================================================== NOTE: SOE = START OF (DATA COLLECTION) EPISODE, EOE = END OF EPISODE |
Figure 39. 3990 Storage Control Report: Subtotals for Cache Subsystem mmmm (Part 3)
3990 STORAGE CONTROL REPORT: SUBTOTALS FOR CACHE SUBSYSTEM 6207 (PART 3) COMPLEXWIDE 27 FEB 14:18:27 FILE PAGE 209 CACHE SHAPE CURRENT IML NEXT IML ------------ ------------ SLOTS SIZE PERCENT SIZE PERCENT ---------- ---- ------- ---- ------- FULL TRACK 25.00 25.00 RECORD 1 381 25.00 381 25.00 RECORD 2 1055 25.00 1055 25.00 RECORD 3 4096 25.00 4096 25.00 LOCKING CATEGORY CURRENT IML NEXT IML SOE EOE HWM ---------------------- ----------- ----------- ----------- ----------- ----------- LOCKS ALLOCATED 16384 0 LOCKS IN USE 1 0 0 PERCENTAGE IN USE 0.01 0.00 0.00 RAN OUT OF LOCKS? NO ==================================================================================================================================== NOTE: SOE = START OF (DATA COLLECTION) EPISODE, EOE = END OF EPISODE, HWM = HIGHWATER MARK DURING EPISODE |
This report contains subtotals for a specific SDA on an active 3990 cache subsystem (see Figure 40 and Figure 41)
Figure 40. 3990 Storage Control Report for SDA nnnn, Cache Subsystem mmmm (Part 1)
Figure 41. 3990 Storage Control Report for SDA nnnn, Cache Subsystem mmmm (Part 2)
3990 STORAGE CONTROL REPORT FOR SDA 0231, CACHE SUBSYSTEM 00FE (PART 2) DASD STATUS CATEGORY SOE EOE PROTOTYPE --------------------------- --- --- ----------- CACHING ACTIVE YES YES 00.. .... . UNDEFINED NO NO 01.. .... . DEACTIVATE PENDING NO NO 10.. .... . CACHING DEACTIVATED NO NO 11.. .... . DASD-FAST-WRITE ALLOWED YES YES ..00 .... . UNDEFINED NO NO ..01 .... . DEACTIVATE PENDING NO NO ..10 .... . DASD-FAST-WRITE DEACTIVATED NO NO ..11 .... . PRIMARY OF A DUPLEX PAIR NO NO .... 1... . SECONDARY OF A DUPLEX PAIR NO NO .... .1.. . DUPLEX PAIR SUSPENDED NO NO .... **1. . DUPLEX PAIR AVAILABLE NO NO .... **00 . DUPLEX PAIR PENDING NO NO .... **01 . PINNED DATA EXISTS NO NO .... .... 1 ================================================================================ NOTE: SYMBOLIC DEVICE ADDRESS 0231 IS SYMBOLIC MODULE NUMBER 0047 IN TPF SUBSYS NOTE: SOE = START OF (DATA COLLECTION) EPISODE, EOE = END OF EPISODE |
This report contains summarized totals for all of the 3990 cache subsystems and summarized subtotals for each of the active 3990 cache subsystems (see Figure 42).
Figure 42. 3990 Storage Control Cache Summary Report
3990 STORAGE CONTROL CACHE SUMMARY REPORT COMPLEXWIDE 27 FEB 14:18:27 FILE PAGE 203 CATEGORY TOTALS SSID 6207 SSID 6208 SSID 6209 SSID 620B SSID 620C SSID 620D SSID 620E ------------------------------ ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- NUMBER OF CACHE SUBSYSTEMS 8 NUMBER OF DASD 27 3 3 4 4 3 4 4 NUMBER OF LOCKS ALLOCATED 131072 16384 16384 16384 16384 16384 16384 16384 RAN OUT OF LOCKS? NO NO NO NO NO NO NO NO SOE: CACHE CONFIGURED CAPACITY 1073741824 536870912 536870912 1073741824 536870912 536870912 536870912 PERCENTAGE PINNED 0.00 0.00 0.00 0.00 0.00 0.00 0.00 PERCENTAGE OFFLINE 0.00 0.00 0.00 0.00 0.00 0.00 0.00 NVS CONFIGURED CAPACITY 16777216 16777216 16777216 16777216 16777216 16777216 16777216 PERCENTAGE PINNED 0.00 0.00 0.00 0.00 0.00 0.00 0.00 LOCKS IN USE 5 1 2 0 2 0 0 0 PERCENTAGE IN USE *.** 0.01 0.01 0.00 0.01 0.00 0.00 0.00 EOE: CACHE CONFIGURED CAPACITY 1073741824 536870912 536870912 1073741824 536870912 536870912 536870912 PERCENTAGE PINNED 0.00 0.00 0.00 0.00 0.00 0.00 0.00 PERCENTAGE OFFLINE 0.00 0.00 0.00 0.00 0.00 0.00 0.00 NVS CONFIGURED CAPACITY 16777216 16777216 16777216 16777216 16777216 16777216 16777216 PERCENTAGE PINNED 0.00 0.00 0.00 0.00 0.00 0.00 0.00 LOCKS IN USE 4 0 0 0 2 0 0 1 PERCENTAGE IN USE *.** 0.00 0.00 0.00 0.01 0.00 0.00 0.01 HWM: LOCKS IN USE 0 0 0 0 0 0 0 PERCENTAGE IN USE 0.00 0.00 0.00 0.00 0.00 0.00 0.00 READS PER WRITE 4.02 3.52 3.56 3.55 4.62 4.33 3.51 4.36 READS 1315.43 130.04 133.45 133.33 260.57 130.04 132.65 197.56 CFW READS 1315.43 130.04 133.45 133.33 260.57 130.04 132.65 197.56 NORMAL READS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 READ HITS 1315.43 130.04 133.45 133.33 260.57 130.04 132.65 197.56 CFW READ HITS 1315.43 130.04 133.45 133.33 260.57 130.04 132.65 197.56 NORMAL READ HITS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 READ HIT PERCENTAGE 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 CFW READ HITS 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 NORMAL READ HITS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 WRITES 326.89 36.94 37.52 37.52 56.40 30.04 37.79 45.35 CFW WRITES 280.08 28.80 29.64 29.64 52.93 26.85 29.91 41.25 NORMAL WRITES 46.80 8.13 7.88 7.87 3.47 3.19 7.88 4.10 RETENTIVE WRITES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 DFW WRITES 46.80 8.13 7.88 7.87 3.47 3.19 7.88 4.10 DFW BYPASSES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 WRITE HITS 326.80 36.94 37.52 37.51 56.38 30.03 37.78 45.33 CFW WRITE HITS 280.08 28.80 29.64 29.64 52.93 26.85 29.91 41.25 HIT PERCENTAGE 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 DFW WRITE HITS (NVS) 46.71 8.13 7.88 7.87 3.45 3.18 7.86 4.08 NVS HIT PERCENTAGE 99.81 100.00 99.97 99.97 99.37 99.52 99.83 99.47 READS AND WRITES 1642.32 166.98 170.98 170.84 316.98 160.09 170.44 242.91 DESTAGE OPERATIONS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 DESTAGE PERCENTAGE 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 CAPTURE CHAINS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 CAPTURE CHAIN HITS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 HIT PERCENTAGE 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 RESTORE CHAINS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 TOTAL BYPASS CACHE CHAINS 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 BAD READS AND WRITES 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 ==================================================================================================================================== NOTE: SOE = START OF (DATA COLLECTION) EPISODE, EOE = END OF EPISODE, HWM = HIGHWATER MARK DURING EPISODE NOTE: CFW = CACHE FAST WRITE, DFW = DASD FAST WRITE, NVS = NONVOLATILE STORAGE |
This report contains summarized totals for all 3990 cache subsystems, summarized subtotals for a specific active 3990 cache subsystem, and summarized statistics for each of the active DASDs backing the 3990 cache subsystem (see Figure 43).
Figure 43. 3990 Storage Control Device Summary Report for Cache Subsystem mmmm
3990 STORAGE CONTROL DEVICE SUMMARY REPORT FOR CACHE SUBSYSTEM 6207 COMPLEXWIDE 27 FEB 14:18:27 FILE PAGE 231 CATEGORY TOTALS SSID 6207 SDA 201C SDA 201D SDA 201E ------------------------------ ----------- ----------- ----------- ----------- ----------- NUMBER OF CACHE SUBSYSTEMS 8 NUMBER OF DASD 27 3 TPF SUBSYSTEM BSS BSS BSS NUMBER OF LOCKS ALLOCATED 131072 16384 RAN OUT OF LOCKS? NO NO SOE: CACHE CONFIGURED CAPACITY 1073741824 PERCENTAGE PINNED 0.00 PERCENTAGE OFFLINE 0.00 NVS CONFIGURED CAPACITY 16777216 PERCENTAGE PINNED 0.00 LOCKS IN USE 5 1 PERCENTAGE IN USE *.** 0.01 EOE: CACHE CONFIGURED CAPACITY 1073741824 PERCENTAGE PINNED 0.00 PERCENTAGE OFFLINE 0.00 NVS CONFIGURED CAPACITY 16777216 PERCENTAGE PINNED 0.00 LOCKS IN USE 4 0 PERCENTAGE IN USE *.** 0.00 HWM: LOCKS IN USE 0 PERCENTAGE IN USE 0.00 READS PER WRITE 4.02 3.52 3.51 0.00 3.53 READS 1315.43 130.04 63.71 0.00 66.32 CFW READS 1315.43 130.04 63.71 0.00 66.32 NORMAL READS 0.00 0.00 0.00 0.00 0.00 READ HITS 1315.43 130.04 63.71 0.00 66.32 CFW READ HITS 1315.43 130.04 63.71 0.00 66.32 NORMAL READ HITS 0.00 0.00 0.00 0.00 0.00 READ HIT PERCENTAGE 100.00 100.00 100.00 0.00 100.00 CFW READ HITS 100.00 100.00 100.00 0.00 100.00 NORMAL READ HITS 0.00 0.00 0.00 0.00 0.00 WRITES 326.89 36.94 18.16 0.00 18.78 CFW WRITES 280.08 28.80 14.18 0.00 14.63 NORMAL WRITES 46.80 8.13 3.98 0.00 4.16 RETENTIVE WRITES 0.00 0.00 0.00 0.00 0.00 DFW WRITES 46.80 8.13 3.98 0.00 4.16 DFW BYPASSES 0.00 0.00 0.00 0.00 0.00 WRITE HITS 326.80 36.94 18.16 0.00 18.78 CFW WRITE HITS 280.08 28.80 14.18 0.00 14.63 HIT PERCENTAGE 100.00 100.00 100.00 0.00 100.00 DFW WRITE HITS (NVS) 46.71 8.13 3.98 0.00 4.16 NVS HIT PERCENTAGE 99.81 100.00 100.00 0.00 100.00 READS AND WRITES 1642.32 166.98 81.87 0.00 85.10 DESTAGE OPERATIONS 0.00 0.00 0.00 0.00 0.00 DESTAGE PERCENTAGE 0.00 0.00 0.00 0.00 0.00 CAPTURE CHAINS 0.00 0.00 0.00 0.00 0.00 CAPTURE CHAIN HITS 0.00 0.00 0.00 0.00 0.00 HIT PERCENTAGE 0.00 0.00 0.00 0.00 0.00 RESTORE CHAINS 0.00 0.00 0.00 0.00 0.00 TOTAL BYPASS CACHE CHAINS 0.00 0.00 0.00 0.00 0.00 BAD READS AND WRITES 0.00 0.00 0.00 0.00 0.00 ==================================================================================================================================== NOTE: SOE = START OF (DATA COLLECTION) EPISODE, EOE = END OF EPISODE, HWM = HIGHWATER MARK DURING EPISODE NOTE: CFW = CACHE FAST WRITE, DFW = DASD FAST WRITE, NVS = NONVOLATILE STORAGE |
There is an error log that reports any anomalies detected in the data collected for the storage control reports (see Figure 44).
Figure 44. DP Record Anomaly Log
See the publications listed in Related Information for definitions of the terms used in these reports and for more information about the 3990 cache control units.