topic Re: disk performance/usage by logical volume in Operating System - HP-UX

disk performance/usage by logical volume

John J Burke — Thu, 22 Oct 2009 14:20:31 GMT

Hi,

I have a disk performance issue. I have narrowed this down to two volume groups.

Each only has one disk. Both have multiple raw logical volumes.

I need to identify which raw lvol on my hpux boxes are using the disk and when, and track the performance.

Anyone know how to do this?

Re: disk performance/usage by logical volume

Mounaam — Fri, 23 Oct 2009 10:40:03 GMT

Hi,

if you have Glance, take a look to screen "IO By Logical Volume" (key v).

Regards,
Mounaam

Re: disk performance/usage by logical volume

Michael Steele_2 — Fri, 23 Oct 2009 11:38:12 GMT

pvdisplay -v /dev/disk/c#t#d# | more

refer to lvols in 2nd section

Re: disk performance/usage by logical volume

PVR — Mon, 26 Oct 2009 07:34:41 GMT

using vgdisplay -v , identify the disks. Then do a pvdisplay -v /dev/dsk/c#t#d# on the disk and identify, which logical volumes are part of the particular disk.

Re: disk performance/usage by logical volume

Raj D. — Mon, 26 Oct 2009 08:03:34 GMT

John,

You can figure out from this screen:
In Glance check,
d Disk Detail
i Disk I/O by File System
v Logical Volume Detail

Also from the top pid , using top io ,
you can do a ps -ef on the pid. You will know the process details and subsequently filesystem/lv details from that as well.

Cheers,
Raj.

Re: disk performance/usage by logical volume

John J Burke — Tue, 27 Oct 2009 09:29:26 GMT

Thanks guys,

I have done this with glance. Is there a way to run glance and monitor only the lvols i am interested in, dumping the output to a file?