|
|
|
Figures 2-75 and 2-76 show the output from the two ASM
Page/Swap Response Time Reports. From these figures, we can
see that the change to the final configuration was made in
two steps. The drums were removed during the week of 9/7/yy
and then, by the week of 11/15/yy, the ASM configuration was
isolated on channel 1 to reach the final configuration shown
in the second ASM Page/Swap Response Time Report (Figure
2-76).
As we noted at the beginning of this case study, in setting
up the new configuration we had the following goals:
o Ensure that local paging does not suffer from removal of
the drums.
o Look for page response problems.
o Verify that the "low activity" data sets on the swap
volumes have not caused problems.
o Check for any overloading conditions.
o Review the initial size estimates.
First, the 3380s are giving approximately the same service as
the drum, so clearly local paging was not hurt by this
change. We should review hourly ASM Page/Swap Response Time
Reports to ensure that consistent service is being given.
Next, based on the data set busy times and page transfer
rates, this configuration is rather lightly loaded.
As a final note, by isolating the ASM data sets on a channel,
we should get more consistent response.
CA MICS Performance Manager WEEKLY ASM DATASET RESPONSE REPORT FOR ZONE = 1 SYSTEM = PROD RUN DATE = NOV 20, yyyy ---------------------------------------------------------------------------------------- | | | WEEKS: 08/18/yy 08/25/yy 09/01/yy 09/08/yy 09/15/yy CHANGE % | | | |--------------------------------------------------------------------------------------| | | | COMMON DATASET | | -------------- | | | | SYS2.LOCAL181 (3380) 0.017 0.023 0.021 0.017 0.023 35.29 % | | | |--------------------------------------------------------------------------------------| | | | LOCAL DATASET | | ------------- | | | | SYS2.LCL1A0A (2305-2) 0.030 0.038 0.047 0.000 0.000 N/A | | SYS2.LCL1A0B (2305-2) 0.029 0.038 0.041 0.000 0.000 N/A | | SYS2.LOCAL168 (3380) 0.000 0.000 0.023 0.020 0.021 -8.70 % | | SYS2.LOCAL182 (3380) 0.029 0.032 0.034 0.026 0.026 -10.34 % | | SYS2.LOCAL183 (3380) 0.030 0.033 0.034 0.032 0.029 -3.33 % | | | |--------------------------------------------------------------------------------------| | | | PLPA DATASET | | ------------ | | | | SYS2.PLPA180 (3380) 0.016 0.022 0.026 0.019 0.018 12.50 % | | | |--------------------------------------------------------------------------------------| | | | SWAP DATASET | | ------------ | | | | SYS2.SWAP16C (3380) 0.000 0.000 0.075 0.067 0.067 -10.60 % | | SYS2.SWAP291 (3380) 0.035 0.035 0.040 0.033 0.037 5.71 % | | SYS2.SWAP292 (3380) 0.043 0.045 0.049 0.041 0.041 -4.65 % | | SYS2.SWAP5C3 (3350) 0.108 0.113 0.127 0.000 0.000 N/A | | SYS2.SWAP3EA (3350) 0.077 0.083 0.081 0.106 0.077 --- | | | ----------------------------------------------------------------------------------------
Figure 2-75. Case Study - ASM Page/Swap Response Time Report / Old Configuration
CA MICS Performance Manager
WEEKLY ASM DATASET RESPONSE REPORT
FOR ZONE = 1
SYSTEM = PROD RUN DATE = NOV 20, yyyy
----------------------------------------------------------------------
| |
| WEEKS: 11/03/yy 11/10/yy 11/17/yy CHANGE % |
| |
|--------------------------------------------------------------------|
| |
| COMMON DATASET |
| -------------- |
| |
| SYS2.LOCAL161 (3380) 0.021 0.021 0.019 -9.52 % |
| |
|--------------------------------------------------------------------|
| |
| LOCAL DATASET |
| ------------- |
| |
| SYS2.LOCAL16C (3380) 0.021 0.022 0.019 -9.52 % |
| SYS2.LOCAL16E (3380) 0.020 0.021 0.021 5.00 % |
| SYS2.LOCAL168 (3380) 0.021 0.020 0.019 -9.52 % |
| |
|--------------------------------------------------------------------|
| |
| PLPA DATASET |
| ------------ |
| |
| SYS2.PLPA161 (3380) 0.025 0.027 0.039 56.00 % |
| |
|--------------------------------------------------------------------|
| |
| SWAP DATASET |
| ------------ |
| |
| SYS2.SWAP17D (3380) 0.060 0.059 0.060 0.00 % |
| SYS2.SWAP171 (3380) 0.055 0.051 0.056 1.82 % |
| SYS2.SWAP173 (3380) 0.125 0.114 0.117 -6.37 % |
| |
----------------------------------------------------------------------
Figure 2-76. Case Study - ASM Page/Swap Response Time Report / New Configuration
CA MICS Performance Manager HOURLY ASM DATASET ACTIVITY REPORT FOR ZONE = 1 SYSTEM = PROD RUN DATE = NOV 20, yyyy DSN = SYS1.PAGE16C UNIT = 16C DEVICE TYPE = 3380 PAGE SPACE TYPE = LOCAL --------------------------------------------------------------------------------------------------------------------------------- | | | HOUR/DATE (HR-MM/DD): 08-11/19 09-11/19 10-11/19 11-11/19 12-11/19 13-11/19 14-11/19 15-11/19 16-11/19 17-11/19 CHANGE % | | | |-------------------------------------------------------------------------------------------------------------------------------| | | | DATASET SIZE | | ------------ | | | | AVG SLOTS ALLOCATED 12750 12750 12750 12750 12750 12750 12750 12750 12750 12750 --- | | AVG SLOTS USED 2086.25 2709.00 2950.75 3477.00 3368.50 3475.75 3498.25 3637.00 3497.25 3071.63 47.24 % | | MAX SLOTS USED 2612.00 2898.00 3278.00 3858.00 3695.00 3789.00 3716.00 3857.00 3879.00 3257.00 24.69 % | | UNUSABLE SLOTS 0 0 0 0 0 0 0 0 0 0 N/A | | PERCENT SLOTS USED 16.36 % 21.25 % 23.14 % 27.27 % 26.42 % 26.26 % 27.44 % 28.53 % 27.43 % 24.09 % 47.24 % | | | |-------------------------------------------------------------------------------------------------------------------------------| | | | DATASET WORKLOAD | | ---------------- | | | | TOTAL PAGING I/O 2430 5401 9494 13162 11164 16030 17493 18439 14192 7795 220.78 % | | TOTAL DEVICE I/O 2433 5452 9498 13240 11166 16052 17507 18442 14194 7820 221.41 % | | I/O CONTENTION INDEX 0.001 0.009 0.000 0.006 0.000 0.001 0.001 0.000 0.000 0.003 300.00 % | | AVG I/O RATE 0.68 1.50 2.64 3.66 3.10 4.45 4.86 5.12 3.94 2.89 327.71 % | | MAX I/O RATE 0.99 1.77 3.98 4.51 3.66 5.63 5.98 6.47 5.41 3.30 232.27 % | | AVG PAGE RATE 3.60 2.52 0.37 2.13 3.42 2.41 3.11 2.44 1.54 2.68 -25.55 % | | AVG PAGE BURST SIZE 12.81 13.40 14.00 14.78 14.51 15.88 14.88 13.21 11.65 12.71 -0.01 % | | AVG DATASET UTIL 1.50 % 2.33 % 5.58 % 7.86 % 5.94 % 10.69 % 9.47 % 10.88 % 8.13 % 4.96 % 230.86 % | | MAX DATASET UTIL 3.00 % 3.44 % 7.65 % 10.44 % 7.66 % 12.45 % 12.22 % 13.76 % 11.76 % 5.77 % 92.59 % | | | |-------------------------------------------------------------------------------------------------------------------------------| | | | DATASET SERVICE | | --------------- | | | | AVG RESPONSE TIME/IO 0.023 0.016 0.022 0.022 0.019 0.024 0.020 0.021 0.021 0.018 -21.74 % | | AVG SERVICE TIME/IO 0.022 0.016 0.021 0.022 0.019 0.024 0.019 0.021 0.021 0.017 -22.64 % | | AVG SERVICE TIME/PAGE 0.002 0.001 0.002 0.004 0.003 0.003 0.002 0.003 0.002 0.001 -50.00 % | | MAX SERVICE TIME 0.030 0.020 0.026 0.023 0.021 0.029 0.021 0.022 0.024 0.020 -35.06 % | | | ---------------------------------------------------------------------------------------------------------------------------------
Figure 2-77. Case Study - ASM Page/Swap Data Set Activity Report (Part 1 of 4)
CA MICS Performance Manager HOURLY ASM DATASET ACTIVITY REPORT FOR ZONE = 1 SYSTEM = PROD RUN DATE = NOV 20, yyyy DSN = SYS1.PAGE161 UNIT = 161 DEVICE TYPE = 3380 PAGE SPACE TYPE = COMMON --------------------------------------------------------------------------------------------------------------------------------- | | | HOUR/DATE (HR-MM/DD): 08-11/19 09-11/19 10-11/19 11-11/19 12-11/19 13-11/19 14-11/19 15-11/19 16-11/19 17-11/19 CHANGE % | | | |-------------------------------------------------------------------------------------------------------------------------------| | | | DATASET SIZE | | ------------ | | | | AVG SLOTS ALLOCATED 12750 12750 12750 12750 12750 12750 12750 12750 12750 12750 --- | | AVG SLOTS USED 1648.50 1655.50 1667.00 1695.25 1707.25 1710.00 1717.75 1729.44 1729.75 1662.00 0.82 % | | MAX SLOTS USED 1654.00 1660.00 1674.00 1709.00 1710.00 1715.00 1728.00 1732.00 1732.00 1728.00 4.47 % | | UNUSABLE SLOTS 0 0 0 0 0 0 0 0 0 0 N/A | | PERCENT SLOTS USED 12.93 % 12.98 % 13.07 % 13.30 % 13.39 % 13.41 % 13.47 % 13.56 % 13.57 % 13.04 % 0.82 % | | | |-------------------------------------------------------------------------------------------------------------------------------| | | | DATASET WORKLOAD | | ---------------- | | | | TOTAL PAGING I/O 467 1094 3091 6675 4214 7753 8286 9919 6155 2014 331.26 % | | TOTAL DEVICE I/O 475 1098 3092 6695 4219 7766 8487 9931 6156 2085 338.95 % | | I/O CONTENTION INDEX 0.017 0.004 0.000 0.003 0.001 0.002 0.024 0.001 0.000 0.035 105.88 % | | AVG I/O RATE 0.13 0.30 0.86 1.85 1.17 2.15 2.30 2.76 1.71 0.75 475.09 % | | MAX I/O RATE 0.20 0.46 1.41 2.90 1.46 3.15 3.38 3.58 2.57 1.07 423.14 % | | AVG PAGE RATE 3.39 2.64 1.51 0.73 0.34 0.31 0.45 0.56 0.87 0.66 -80.53 % | | AVG PAGE BURST SIZE 19.54 15.32 16.78 14.33 16.78 14.79 14.48 15.61 14.08 12.83 -34.33 % | | AVG DATASET UTIL 0.30 % 0.55 % 1.58 % 3.83 % 2.08 % 3.85 % 4.91 % 5.50 % 3.38 % 1.40 % 360.57 % | | MAX DATASET UTIL 0.77 % 1.00 % 2.33 % 6.33 % 2.66 % 5.77 % 8.00 % 6.99 % 5.33 % 1.55 % 99.98 % | | | |-------------------------------------------------------------------------------------------------------------------------------| | | | DATASET SERVICE | | --------------- | | | | AVG RESPONSE TIME/IO 0.024 0.019 0.020 0.021 0.018 0.019 0.023 0.021 0.020 0.019 -19.87 % | | AVG SERVICE TIME/IO 0.024 0.018 0.018 0.021 0.018 0.018 0.021 0.020 0.020 0.019 -19.90 % | | AVG SERVICE TIME/PAGE 0.001 0.001 0.001 0.002 0.001 0.001 0.002 0.001 0.001 0.001 0.00 % | | MAX SERVICE TIME 0.038 0.029 0.026 0.022 0.024 0.020 0.025 0.022 0.023 0.026 -31.56 % | | | ---------------------------------------------------------------------------------------------------------------------------------
Figure 2-77. Case Study - ASM Page/Swap Data Set Activity Report (Part 2 of 4)
CA MICS Performance Manager HOURLY ASM DATASET ACTIVITY REPORT FOR ZONE = 1 SYSTEM = PROD RUN DATE = NOV 20, yyyy DSN = SYS1.PAGE168 UNIT = 168 DEVICE TYPE = 3380 PAGE SPACE TYPE = LOCAL --------------------------------------------------------------------------------------------------------------------------------- | | | HOUR/DATE (HR-MM/DD): 08-11/19 09-11/19 10-11/19 11-11/19 12-11/19 13-11/19 14-11/19 15-11/19 16-11/19 17-11/19 CHANGE % | | | |-------------------------------------------------------------------------------------------------------------------------------| | | | DATASET SIZE | | ------------ | | | | AVG SLOTS ALLOCATED 12750 12750 12750 12750 12750 12750 12750 12750 12750 12750 --- | | AVG SLOTS USED 2156.75 2793.50 3107.50 3567.50 3437.00 3503.50 3546.50 3693.94 3696.19 3264.31 51.35 % | | MAX SLOTS USED 2456.00 3004.00 3391.00 3902.00 3688.00 3725.00 3900.00 3964.00 3966.00 3496.00 42.35 % | | UNUSABLE SLOTS 0 0 0 0 0 0 0 0 0 0 N/A | | PERCENT SLOTS USED 16.92 % 21.91 % 24.37 % 27.98 % 26.96 % 27.48 % 27.82 % 28.97 % 28.99 % 25.59 % 51.35 % | | | |-------------------------------------------------------------------------------------------------------------------------------| | | | DATASET WORKLOAD | | ---------------- | | | | TOTAL PAGING I/O 2544 5423 9994 13884 11634 17101 17061 18197 14451 8043 216.16 % | | TOTAL DEVICE I/O 2552 5426 10056 13891 11636 17103 17062 18197 14465 8065 216.03 % | | I/O CONTENTION INDEX 0.003 0.001 0.006 0.001 0.000 0.000 0.000 0.000 0.001 0.005 66.67 % | | AVG I/O RATE 0.71 1.51 2.78 3.86 3.23 4.75 4.74 5.05 4.01 2.98 321.54 % | | MAX I/O RATE 0.93 1.83 3.96 4.77 3.91 5.82 5.88 6.24 5.13 3.18 241.51 % | | AVG PAGE RATE 2.39 2.74 1.43 0.89 1.23 0.61 0.55 0.57 1.87 1.66 -30.54 % | | AVG PAGE BURST SIZE 17.54 15.76 14.76 14.54 15.66 13.65 14.33 12.55 13.08 14.73 -16.02 % | | AVG DATASET UTIL 1.50 % 2.83 % 5.69 % 7.91 % 6.86 % 9.66 % 9.86 % 10.19 % 9.05 % 6.11 % 307.41 % | | MAX DATASET UTIL 2.11 % 3.66 % 8.87 % 10.44 % 8.22 % 12.90 % 12.55 % 12.22 % 10.98 % 6.55 % 210.52 % | | | |-------------------------------------------------------------------------------------------------------------------------------| | | | DATASET SERVICE | | --------------- | | | | AVG RESPONSE TIME/IO 0.022 0.019 0.021 0.021 0.022 0.021 0.021 0.021 0.023 0.021 -3.36 % | | AVG SERVICE TIME/IO 0.021 0.019 0.021 0.021 0.021 0.020 0.021 0.020 0.023 0.021 -2.23 % | | AVG SERVICE TIME/PAGE 0.001 0.001 0.001 0.001 0.001 0.002 0.001 0.002 0.002 0.001 0.00 % | | MAX SERVICE TIME 0.024 0.022 0.023 0.023 0.023 0.022 0.022 0.023 0.026 0.021 -11.14 % | | | ---------------------------------------------------------------------------------------------------------------------------------
Figure 2-77. Case Study - ASM Page/Swap Data Set Activity Report (Part 3 of 4)
CA MICS Performance Manager HOURLY ASM DATASET ACTIVITY REPORT FOR ZONE = 1 SYSTEM = PROD RUN DATE = NOV 20, yyyy DSN = SYS1.SWAP17D UNIT = 17D DEVICE TYPE = 3380 PAGE SPACE TYPE = SWAP --------------------------------------------------------------------------------------------------------------------------------- | | | HOUR/DATE (HR-MM/DD): 08-11/19 09-11/19 10-11/19 11-11/19 12-11/19 13-11/19 14-11/19 15-11/19 16-11/19 17-11/19 CHANGE % | | | |-------------------------------------------------------------------------------------------------------------------------------| | | | DATASET SIZE | | ------------ | | | | AVG SLOTS ALLOCATED 240 240 240 240 240 240 240 240 240 240 --- | | AVG SLOTS USED 46.00 57.50 63.25 66.50 59.50 62.25 61.25 62.00 69.75 58.33 26.79 % | | MAX SLOTS USED 57.00 69.00 78.00 83.00 72.00 75.00 81.00 78.00 87.00 74.00 29.82 % | | UNUSABLE SLOTS 0 0 0 0 0 0 0 0 0 0 N/A | | PERCENT SLOTS USED 19.17 % 23.96 % 26.35 % 27.71 % 24.79 % 25.94 % 25.52 % 25.83 % 29.06 % 24.30 % 26.79 % | | | |-------------------------------------------------------------------------------------------------------------------------------| | | | DATASET WORKLOAD | | ---------------- | | | | TOTAL PAGING I/O 1424 2617 3442 4073 3507 4743 4987 5004 4960 3028 112.64 % | | TOTAL DEVICE I/O 1435 2617 3449 4105 3515 4748 5012 5005 4963 3115 117.07 % | | I/O CONTENTION INDEX 0.008 0.000 0.002 0.008 0.002 0.001 0.005 0.000 0.001 0.029 262.50 % | | AVG I/O RATE 0.40 0.73 0.96 1.13 0.97 1.32 1.39 1.39 1.38 1.12 183.47 % | | MAX I/O RATE 0.52 0.88 1.04 1.32 1.04 1.50 1.55 1.55 1.57 1.21 131.42 % | | AVG PAGE RATE 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 N/A | | AVG PAGE BURST SIZE 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 N/A | | AVG DATASET UTIL 1.38 % 2.75 % 3.33 % 3.75 % 3.47 % 5.19 % 5.97 % 5.44 % 5.27 % 4.51 % 225.37 % | | MAX DATASET UTIL 2.44 % 2.88 % 4.33 % 4.33 % 4.22 % 5.99 % 7.11 % 6.65 % 6.00 % 5.11 % 109.41 % | | | |-------------------------------------------------------------------------------------------------------------------------------| | | | DATASET SERVICE | | --------------- | | | | AVG RESPONSE TIME/IO 0.051 0.052 0.053 0.048 0.057 0.060 0.066 0.060 0.059 0.063 23.53 % | | AVG SERVICE TIME/IO 0.043 0.045 0.043 0.040 0.046 0.050 0.054 0.049 0.048 0.051 18.62 % | | AVG SERVICE TIME/PAGE 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 N/A | | MAX SERVICE TIME 0.069 0.054 0.059 0.045 0.056 0.062 0.060 0.059 0.052 0.058 -15.96 % | | | ---------------------------------------------------------------------------------------------------------------------------------
Figure 2-77. Case Study - ASM Page/Swap Data Set Activity Report (Part 4 of 4)
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