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AIX 5.3 - Discrepancies between "top" and "vmstat"

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Operating Systems AIX AIX 5.3 - Discrepancies between "top" and "vmstat"
# 1  
Old 11-24-2009
AIX 5.3 - Discrepancies between "top" and "vmstat"
Can someone explain the differences I'm seeing below in TOP and VMSTAT commands on my AIX 5.3 server?

Thanks!
Code:
 
CPUs:  4; load averages:  0.86,  0.97,  0.97    18:09:26
926 processes: 4 stopped, 922 running
CPU states: 78.4% idle,  8.5% user, 12.6% kernel,  0.3% wait
Memory: 23680M Total. Real: 11392M, 91M Free, 2192M Buffers. Virtual: 12288M, 10155M Free
  PID USERNAME PRI NICE   SIZE   RES STATE   TIME   WCPU    CPU COMMAND
6283440 hci        0   0   30M   31M  run    31:32  4.0/ 0.4 hciengine
 94424 root       0   0  498k  440k  run  5:18:05  2.7/ 2.0 syncd
639040 hci        0   0  185M  165M  run 20:46:07  2.4/ 7.7 java
696490 hci        0   0  550k  500k  run  1:19:43  1.3/ 0.5 lm_ip
5169156 hci        0   0   22M   21M  run    21:45  1.0/ 0.1 hciengine

Code:
 
/>date; vmstat -w 5
Tue Nov 24 18:09:16 CST 2009
System Configuration: lcpu=4 mem=11392MB
 kthr          memory                         page                       faults           cpu
------- --------------------- ------------------------------------ ------------------ -----------
  r   b        avm        fre    re    pi    po    fr     sr    cy    in     sy    cs us sy id wa
  2   1    2736375      23618     0     4     0     0      0     0    94  12101  1662 20 15 64  1
  2   0    2736420      23541     0     1     0     0      0     0   232  12652  2065 18 19 62  0
  2   0    2736516      23417     0     0     0     0      0     0   104  11967  1878 17 16 66  0
  1   1    2736758      23110     0     1     0     0      0     0   224  12186  1780 19 18 62  1
  3   1    2736257      23573     0     2     0     0      0     0    91  11672  1620 20 14 65  1
  3   0    2736497      23268     0     2     0     0      0     0   242  13758  2153 20 19 60  1

# 2  
Old 11-26-2009
Not sure which difference you mean, but generally I'd go for vmstat since it comes directly with the OS. If there is still a doubt you can also check with sar or nmon etc.
For the memory I see no difference and for the CPU part, are you sure you took the snippets while running both tools at the same time?
The memory might look "different" since vmstat shows memory in 4kb pages.

You have some counts in "pi". Not sure what you are running on this box and if you have noticable performance problems at peak times - maybe you want to tune VMM a bit.

Moving the thread to the AIX subforum.
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