HPE Community
Operating System - HP-UX
1835196 Members
2164 Online
110077 Solutions
New Discussion

Wait I/O calculation in HP-UX

 
Fredric
Occasional Contributor

‎12-28-2006 01:23 AM

‎12-28-2006 01:23 AM

Wait I/O calculation in HP-UX

Hi,

Can anyone tell me how the wait io value is calculated in sar. Is high wait io value is showing real IO bottleneck in a modern multiprocessor system? I got different opinion from different people.

Thanks in advance...
Fredric
no pain no gain
0 Kudos
Reply
2 REPLIES 2
Peter Godron
Honored Contributor

‎12-28-2006 01:30 AM

‎12-28-2006 01:30 AM

Re: Wait I/O calculation in HP-UX

Fredric,
Please read:
http://forums1.itrc.hp.com/service/forums/helptips.do?#33 on how to reward any useful answers given to your questions.

So far you have never awarded any points !

For your question please see:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=132890
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=425027
0 Kudos
Reply
Raj D.
Honored Contributor

‎12-28-2006 01:32 PM

‎12-28-2006 01:32 PM

Re: Wait I/O calculation in HP-UX

Fredric,

You can use # sar -u 5 10 , and monitor the %wio value, %wio will provide wait time details for processes waiting for I/O.


Also, it will be a good idea to use iostat and glance to check the IO bottlenecks as well.

Cheers,
Raj.
" If u think u can , If u think u cannot , - You are always Right . "
0 Kudos
Reply
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.