Performance Monitoring Processes doing reading and writing

[BEN WRIGHT]

Hello there
Are there any commands which actually allow me to find what processes are reading from or writing to a disk/s?
For example I can use sar -d to see that the disks are busy, and I can use lsof to see what processes have open files on those disks (the way the file system is set up).
But how can I find out what is actually reading or writing?
Your help is appreciated.
Best regards
Ben

[Paula J Frazer-Campbell]

Ben

Fuser may do what you require, you must be root to run it.

see man fuser.

Paula

[Christopher McCray_1]

Hello,

If you have it, you can use the Measureware product to extract process data using the PROC_DISK_LOGL_READ_RATE, PROC_DISK_LOGL_WRITE_RATE, and so on and tie them to the metric PROC_APP_ID.

Hope this helps

Chris

[BEN WRIGHT]

Sorry I was looking for more than this, but there you go.

Best regards

Ben

[harry d brown jr]

Ben,

The real answer is NO, because processes can switch back and forth between processors so fast that measuring that grainularity is insane and more likely a waste of resources.

You could PRETEND that processes don't switch between processors and capture a ps -ef when you are doing a sar -d, and then match the IO activity up to the processes and then extract the CPU number.

live free or die
harry

[Ravi_8]

Hi Ben

as for as i know, there are no any commands.