Disk Performance

[Filosofo]

Hi,
I have a system with install OS version 11.00 on L3000 model.
I have an high disk utilization, 94-98% from some hours.
What can I do to find the proc or processes make more IO activity on disks?
I hope that you can help me.

By and thanks

Filo

[Sunil Sharma_1]

Hi,

You can use glance to find out which disk has more i/o and which process is generating those IO's.

once you identified thoese process you can decide what to do with them.

generally it happened becoz of some database query or report if your server is Database/report server.



Sunil

[Jaimin Parikh]

Hi,

If you do not have utilities like glance, you may use this manual procedure to find our the high i/o processes.

Since, you know the device which is hit maximum, you should know the file system mounted on that.

Now, use command "lsof | grep " to list the open files for those particular file systems. "lsof" will give you the process name,process id and the file name.

I hope this solve the purpose.

Regards,
Jaimin

[G. Vrijhoeven]

Hi Filo,

Glance is the best tool. Free for 60 days.
If you do not have the tool you can:


The disk io can be found with a basic tool like sar ( -d ). I assuem you know that since you have disk util numbers. You can see alle the processes active with fuser -cu mountpoint, grep the pids and do a ps -ef | grep pid.

HTH,

Gideon

[PVR]

Use glanceplus
#gpm

Glance will be there in the application CDs. Install the trial version.

If glance is not installed, use can use #iostat also to findout which disk is being utilized more. Then use sar -d option

Glnace will give a graphical representation which is very easy to understand.

[Cheryl Griffin]

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