topic Re: IO table in Operating System - HP-UX

IO table

LUETE Jeanot — Tue, 16 May 2006 02:48:22 GMT

Hi all,

I would like to see the IO table entries, especially to enquire wether it's full or empty.

Thank you very much.

Re: IO table

BPatrick — Tue, 16 May 2006 03:30:46 GMT

You can use the ioscan command to get the details of all the io devices in your system. check the man pages for ioscan for the complete set of option.

Re: IO table

RAC_1 — Tue, 16 May 2006 03:35:37 GMT

What exactly do you want to see? Please elaborate.

Re: IO table

LUETE Jeanot — Tue, 16 May 2006 03:50:36 GMT

I would like to see the kernel's physical and LVM IO tables.

A PeopleSoft batch is running since too long: usually it takes 5 hours, and today it takes 20 hours.

Everything else seems fine on the HP-UX (mem, cpu, etc.), SGBD and SAN sides...

Re: IO table

RAC_1 — Tue, 16 May 2006 04:03:54 GMT

You can't get what you want. But you can get i/o details about lvol, vg and disks. iostat will tell you something about it. Or better sar -d will tell you which disks are diing heavy i/os. glance -i will tell you which lvols are doing heavy i/os.

Once you note lvols doing hevay i/os you can check which vgs they belong to. such way you can find out disk i/o bottlenecks.

How exactly you program runs. Does it do lots reads/writes? Check glance and check process wait reason. What resource it is waiting for?

Re: IO table

Arunkumar.B — Tue, 16 May 2006 04:40:10 GMT

HI ,

To see ur IO permonfance i m attaching a script that will help u ..