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The Auxiliary Storage Management (ASM) Analysis inquiries allow you to track the utilization of the page and swap data sets to find problem areas in the ASM configuration. Three basic report formats provide a view of the utilization and performance of the data sets comprising the ASM auxiliary storage configuration. The reports summarize this data by page space type (for example, for all local data sets), by device type, and by individual data set name. This gives you the capability to identify parts of the ASM configuration that might be causing response problems due to the placement of a single data set, to measure the impact of not isolating an ASM data set, or to quantify the expected benefits from replacing 3350 devices with 3380 devices or a drum (that is, a fixed head device). The inquiry routines use data from the page data set files in the RMF SCP Information Area, combined with the device data from the RMF HAR Information Area, to estimate the elongation of the page or swap service times due to device delays. Figure 2-57 illustrates data that summarizes the utilization and response times of the ASM data sets on 3380 devices.
CA MICS Performance Manager DETAIL ASM DEVICE-TYPE ACTIVITY REPORT SYSTEM = TSO4 RUNDATE = JAN 19, yyyy DEVICE TYPE = 3380 -------------------------------------------------------------------------------------------------------------------------------- | | | INTVL/DAY (HR:MM-DD): 8:13-13 8:29-13 8:43-13 8:59-13 9:13-13 9:29-13 9:44-13 9:58-13 10:14-13 10:29-13 CHANGE % | | | |------------------------------------------------------------------------------------------------------------------------------| | | | DATASET SIZE | | ------------ | | | | AVG SLOTS ALLOCATED 25688 25688 25688 25688 25688 25688 25688 25688 25688 25688 --- | | AVG SLOTS USED 3559.25 4103.00 4460.00 4778.00 5135.00 5639.00 6113.00 6173.00 6373.00 6526.00 83.35 % | | MAX SLOTS USED 6758.00 7675.00 8435.00 8937.00 10017 11660 11892 11960 12328 12856 90.23 % | | UNUSABLE SLOTS 0 0 0 0 0 0 0 0 0 0 N/A | | PERCENT SLOTS USED 13.85 % 15.97 % 17.36 % 18.60 % 19.99 % 21.95 % 23.79 % 24.03 % 24.80 % 25.40 % 83.33 % | | | |------------------------------------------------------------------------------------------------------------------------------| | | | DATASET WORKLOAD | | ---------------- | | | | TOTAL PAGING I/O 2741 7289 5394 6846 5829 12817 13017 16346 19069 16540 503.42 % | | TOTAL DEVICE I/O 2842 8204 5689 7527 6386 14659 15200 19305 23535 19880 599.50 % | | I/O CONTENTION INDEX 0.037 0.126 0.055 0.099 0.096 0.144 0.168 0.181 0.234 0.202 445.94 % | | AVG SIO RATE 0.76 2.02 1.50 1.90 1.62 3.56 3.62 4.54 5.30 4.59 503.94 % | | MAX SIO RATE 1.53 3.62 2.93 3.51 2.96 6.43 6.22 7.48 8.33 7.51 390.84 % | | AVG PAGE RATE 8.85 16.90 17.05 15.96 15.16 27.92 29.75 36.81 50.03 47.01 431.18 % | | AVG PAGE BURST SIZE 11.62 8.35 11.38 8.39 9.36 7.84 8.23 8.11 9.45 10.25 -11.79 % | | AVG DATASET UTIL 3.19 % 7.91 % 5.97 % 6.22 % 5.69 % 13.15 % 13.66 % 16.87 % 25.58 % 21.94 % 588.08 % | | MAX DATASET UTIL 6.44 % 15.22 % 11.66 % 12.55 % 11.22 % 26.85 % 26.00 % 31.81 % 47.27 % 42.06 % 553.10 % | | | |------------------------------------------------------------------------------------------------------------------------------| | | | DATASET SERVICE | | --------------- | | | | AVG RESPONSE TIME/IO 0.042 0.039 0.040 0.033 0.035 0.037 0.038 0.037 0.049 0.048 14.28 % | | AVG SERVICE TIME/IO 0.042 0.039 0.040 0.033 0.035 0.037 0.038 0.037 0.048 0.048 14.28 % | | AVG SERVICE TIME/PAGE 0.004 0.005 0.004 0.004 0.004 0.005 0.005 0.005 0.005 0.005 25.00 % | | MAX SERVICE TIME 0.004 0.022 0.043 0.013 0.016 0.017 0.022 0.020 0.020 0.017 325.00 % | | | --------------------------------------------------------------------------------------------------------------------------------
Figure 2-67. Sample ASM Activity Report by Device Type
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