IO table

[LUETE Jeanot]

Hi all,

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

Thank you very much.

[BPatrick]

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.

[RAC_1]

What exactly do you want to see? Please elaborate.

[LUETE Jeanot]

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...

[RAC_1]

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?

[Arunkumar.B]

HI ,


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