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тАО07-09-2001 08:09 AM
тАО07-09-2001 08:09 AM
Bottleneck
My IT/O gives this error. I tried with Glance. But I could not find which perticular disk/s give this bottleneck error. and how to resolve this.
I'm getting this error on a T and N box running HPUX 10.20 and 11.00 respectively. T is a Oracle Application server and N is Database server
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тАО07-09-2001 08:53 AM
тАО07-09-2001 08:53 AM
Re: Bottleneck
If you've got Glance, this will be a lead pipe cinch. Just start Glance and hit "u" (no quotes) to go to the "IO By Disk" screen. I've attached a sample output from one of my machines.
All The Best,
Jim
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тАО07-09-2001 09:09 AM
тАО07-09-2001 09:09 AM
Re: Bottleneck
Jim gave you a good hint, but you can use another tool called 'sar' by issuing:
sar -d
where n specifies the number of intervals and t specifies the time of each interval in seconds.
for example:
sar -d 5 10
this will give you the disks activity in 10 intervals of 5 seconds (i.e. 50 seconds of activity).
good luck.
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тАО07-09-2001 09:53 AM
тАО07-09-2001 09:53 AM
Re: Bottleneck
Do a sar -d 2 10 and pipe the output in a file , it will record averages for the devices adn give you the results.
Manoj Srivastava
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тАО07-09-2001 10:57 AM
тАО07-09-2001 10:57 AM
Re: Bottleneck
I myself tried all the 'sar' options before I came to you. How can I find from sar -d about the disk bottleneck..?
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тАО07-09-2001 11:31 AM
тАО07-09-2001 11:31 AM
Re: Bottleneck
So you want to intrepret the data from sar -d
, check for the high no. of averages in the fields %busy , avque ,avwait , these are the fields which would definatley give you the cluse , in case the period is small then run it for a long time.
Also could you download sarcheck from www.sarcheck.com , this owuld help you to incase of analysing sar out put .
You can also install glance . Or attach the output for sar -d 2 10 to this forum so that we can help you.
Manoj Srivastava