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# 1  
Old 01-01-2016
Sar showing message
Hi

while checking system utilization using sar command
# 2  
Old 01-01-2016
Like that it will not be obvious... What message are you getting from sar??
# 3  
Old 01-01-2016
soory. there was a typo error in my previous thread. sharing correct one now.

While checking the system utilization using sar command I have noticed below message.
Code:
  20:33:23    %usr    %sys    %wio   %idle   physc
  20:33:24      67       7       0      26    4.00
  20:33:25      68       7       0      25    4.00
  Disk history flag turned off. The current iteration disk utilization values may be inaccurate
   20:33:26      70       7       0      23    4.01
   
  Average       69       7       0      24    4.00

Again running sar command after few minutes then the same message doesn’t appears
I am not sure what this message mean.
As, per my observation this message appears when system utilization goes high.

Regards,
scriptor
Last edited by Franklin52; 01-01-2016 at 12:33 PM.. Reason: Please use code tags
# 4  
Old 01-01-2016
Care to tell us a few details? Like: what system are you using, relevant tuning parameters, what else might be relevant, ....

You know, my crystal ball is in repair right know and i have lately given up on reading minds.

bakunin
This User Gave Thanks to bakunin For This Post:
jim mcnamara
# 5  
Old 01-07-2016
hi
OS is AIX
Code:
oslevel 
5.3.0.0

i am not getting your point
Code:
"tuning parameters"

Last edited by scriptor; 01-07-2016 at 07:36 AM.. Reason: typo err
# 6  
Old 01-07-2016
Quote:
Originally Posted by scriptor
hi
OS is AIX
Code:
oslevel 
5.3.0.0

i am not getting your point
Code:
"tuning parameters"

In AIX (and several other OSes too) "extended" disk reporting is per default disabled because it comes with some performance penalty. It is enabled by setting some tuning parameter. I have no AIX 5.3-system at hand (it is out of support several years now), but to quote from the AIX 7.1-manpage:

Code:
       -b flag. The Block IO statistics need to be enabled using the raso
       tunable biostat. Once the raso tunable is enabled to collect Block IO
       statistics, the operating system takes couple of second to populate the
       statistics before it can be reported. Hence, you need to wait for few
       seconds before you issue the iostat -b command, after enabling the
       Block IO statistic collection.

I remember vaguely the situation being a bit different in 5.3, but there was a similar provision.

I hope this helps.

bakunin
 
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