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Full Discussion: AIX 5.2 performance question
Operating Systems AIX AIX 5.2 performance question Post 302254229 by jhall on Monday 3rd of November 2008 11:46:27 PM
Old 11-04-2008
AIX 5.2 performance question
I am trying to analyze the performance of an AIX system. I think I may have a disk I/O issue, but I am asking for help to validate or invalidate this assumption. I ran the commands below during a period of peak load.

Please help me to find any performance bottlenecks. Thanks in advance for your help! Let me know if any more information is required since I am new to performance tuning on AIX.

*************************
vmstat 1 15
*************************
Code:
kthr     memory             page              faults        cpu
----- ----------- ------------------------ ------------ -----------
 r  b   avm   fre  re  pi  po  fr   sr  cy  in   sy  cs us sy id wa
 1  1 203292   127   0   0   0 134  248   0 395 97470 530  8  8 79  5
 2  2 203007  1848   0   4   0 311  490   0 2469 16936 942  0  8  3 88
 0  3 203007  1179   0   0   0   0    0   0 2488 16406 769  1  3  2 94
 0  3 203007   492   0   0   0   0    0   0 2400 8130 817  2  2  1 94
 0  3 203007   131   0   0   0 831 1348   0 2390 8121 838  0  4  8 87
 0  3 203007   120   0   0   0 1075 1747   0 2313 16763 865  2  7  0 91
 0  2 203007   125   0   0   0 154  232   0 2393 6932 1163  0  8  6 86
 1  3 203007   130   0   0   0 435  696   0 2434 5414 881  0  6  0 93
 0  3 203007   124   0   0  14 539  858   0 2367 7972 787  0  7  6 86
 0  2 203007   130   0   0   0 1238 1946   0 2507 5370 866  0  5 12 83
 0  2 203007   133   0   0   0 1230 2034   0 2492 16579 817  3  4 16 77
 0  2 203007   128   0   0   0 1114 2043   0 2358 5366 849  0  9 11 80
 0  2 203007   129   0   0   0 1972 3248   0 2653 6180 976  2  4 14 82
 0  2 203007   133   0   0   0 1628 2781   0 2337 8640 875  0  5  5 90
 1  2 203007   132   0   0   0 1569 2571   0 2437 6540 1041  0  6  2 91


*************************
iostat 1 10
*************************

Code:
tty:      tin         tout   avg-cpu:  % user    % sys     % idle    % iowait
          1.4        110.6               8.4      8.0       78.7       4.9

Disks:        % tm_act     Kbps      tps    Kb_read   Kb_wrtn
hdisk0           0.3      15.4       0.7   49940629  30144516
hdisk3           0.0       2.3       0.1    8500120   3403880
hdisk1           0.4      23.6       0.9   50158859  72036249
hdisk2           0.0       0.1       0.0     286642     52624

tty:      tin         tout   avg-cpu:  % user    % sys     % idle    % iowait
          1.0        1944.0               1.0      5.0       18.5      75.5

Disks:        % tm_act     Kbps      tps    Kb_read   Kb_wrtn
hdisk0         100.0     8736.0     273.0       4352      4384
hdisk3           0.0       0.0       0.0          0         0
hdisk1         100.0     672.0     168.0         20       652
hdisk2           0.0       0.0       0.0          0         0

tty:      tin         tout   avg-cpu:  % user    % sys     % idle    % iowait
          0.0          0.0               1.5      5.5        7.5      85.5

Disks:        % tm_act     Kbps      tps    Kb_read   Kb_wrtn
hdisk0         100.0     8420.0     264.0       4224      4196
hdisk3           0.0       0.0       0.0          0         0
hdisk1          99.0     680.0     167.0          0       680
hdisk2           0.0       0.0       0.0          0         0

tty:      tin         tout   avg-cpu:  % user    % sys     % idle    % iowait
          1.0          4.0               1.5      6.0        1.5      91.0

Disks:        % tm_act     Kbps      tps    Kb_read   Kb_wrtn
hdisk0         100.0     8704.0     272.0       4352      4352
hdisk3           0.0       0.0       0.0          0         0
hdisk1          98.0     700.0     163.0          0       700
hdisk2           0.0       0.0       0.0          0         0

tty:      tin         tout   avg-cpu:  % user    % sys     % idle    % iowait
          0.0          0.0               0.0      6.5        5.0      88.5

Disks:        % tm_act     Kbps      tps    Kb_read   Kb_wrtn
hdisk0         100.0     8736.0     273.0       4352      4384
hdisk3           0.0       0.0       0.0          0         0
hdisk1         100.0     664.0     166.0          0       664
hdisk2           0.0       0.0       0.0          0         0

tty:      tin         tout   avg-cpu:  % user    % sys     % idle    % iowait
          0.0          0.0               0.5      3.5        0.0      96.0

Disks:        % tm_act     Kbps      tps    Kb_read   Kb_wrtn
hdisk0         100.0     8832.0     276.0       4416      4416
hdisk3           0.0       0.0       0.0          0         0
hdisk1         100.0     676.0     166.0          0       676
hdisk2           0.0       0.0       0.0          0         0

tty:      tin         tout   avg-cpu:  % user    % sys     % idle    % iowait
          0.0          0.0               2.0      8.5       17.0      72.5

Disks:        % tm_act     Kbps      tps    Kb_read   Kb_wrtn
hdisk0         100.0     8576.0     268.0       4288      4288
hdisk3           0.0       0.0       0.0          0         0
hdisk1          93.0     632.0     155.0          0       632
hdisk2           0.0       0.0       0.0          0         0

tty:      tin         tout   avg-cpu:  % user    % sys     % idle    % iowait
          0.0          0.0               0.0      3.5       10.0      86.5

Disks:        % tm_act     Kbps      tps    Kb_read   Kb_wrtn
hdisk0         100.0     8164.0     265.0       4100      4064
hdisk3           0.0       0.0       0.0          0         0
hdisk1          99.0     664.0     166.0          0       664
hdisk2           0.0       0.0       0.0          0         0

tty:      tin         tout   avg-cpu:  % user    % sys     % idle    % iowait
          0.0          0.0               1.5      7.5        6.5      84.5

Disks:        % tm_act     Kbps      tps    Kb_read   Kb_wrtn
hdisk0          99.0     7488.0     242.0       3744      3744
hdisk3           0.0       0.0       0.0          0         0
hdisk1          96.0     688.0     160.0          0       688
hdisk2           0.0       0.0       0.0          0         0

tty:      tin         tout   avg-cpu:  % user    % sys     % idle    % iowait
          0.0          0.0               0.5      6.0        4.5      89.1

Disks:        % tm_act     Kbps      tps    Kb_read   Kb_wrtn
hdisk0          99.5     8278.6     261.7       4160      4160
hdisk3           8.0     131.3      28.9          0       132
hdisk1          99.5     632.8     157.2         12       624
hdisk2           0.0       0.0       0.0          0         0


*************************
lsps -s
*************************
Total Paging Space Percent Used
512MB 13%
Last edited by bakunin; 11-04-2008 at 01:29 AM..
 

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