topic Re: Device read/write statistics? in Operating System - HP-UX

Device read/write statistics?

Paul Garvey — Wed, 09 Mar 2005 15:04:28 GMT

Hi -

I'm trying to get the reads-per-second and writes-per-second for devices. I know 'sar' will give me r+w/s, but I need to figure out the exact figures for reads and writes, not both combined.

Any help would be greatly appreciated.

Thanks,
Paul

Re: Device read/write statistics?

Alex Lavrov. — Wed, 09 Mar 2005 15:14:16 GMT

I think "sar -d" will give you reads and writes in different columns. Can you post here the output of "sar -d 1 1"?

Re: Device read/write statistics?

Alex Lavrov. — Wed, 09 Mar 2005 15:15:40 GMT

Sorry, ignore my post, in linux it's two columns, not in HP. My bad.

Re: Device read/write statistics?

A. Clay Stephenson — Wed, 09 Mar 2005 15:17:07 GMT

Sar is as sar does. Iostat doesn't do this nor does vmstat. Sar -b splits the reads and writes but not by device. You will find that on HP-UX, the performance measuring weapon of choice is Glance. The 60-day Trial version of Glance can be found on any Application CD Set.

Re: Device read/write statistics?

Paul Garvey — Wed, 09 Mar 2005 15:40:32 GMT

Thanks for the help. Do you know where I can download a copy of Glance? I've got an application CD, but I've lost the code.

Thanks,
Paul

Re: Device read/write statistics?

A. Clay Stephenson — Wed, 09 Mar 2005 15:44:07 GMT

The Trial version is not codeword protected. You should be able to swinstall it w/o any problem.

Re: Device read/write statistics?

Paul Garvey — Wed, 09 Mar 2005 16:03:24 GMT

Thanks for all the help!

I have to say, I'm surprised that HP's version of iostat or sar do not give these figures. If you are going to report the reads + the writes, wouldn't it make sense to have the option of showing the reads and writes seperately as well!?!?

Oh well...enough ranting...

Thanks again!

Re: Device read/write statistics?

A. Clay Stephenson — Wed, 09 Mar 2005 16:09:51 GMT

Clearly you don't understand marketing. If you could get the values you're looking for for free, would you buy Glance?