Average Physical Read and Average Physical Writes

[Regina Mitchell]

I have a DBA who is involved in a project that involves updating our Symmetrix Environment. She is looking for the answer to the following question.

What the rough % of read vs write activity is on these filesystems? I thought of using sar, but she needs the average for let's say over a day. I thought of glance, but I do not know if glance has a history of this data and would show an average. Can anyone help?

[Pete Randall · Accepted solution]

Regina,

I think you were close with sar. Try taking a look at "man sa1". You can set up sa1 in a cron job and then use sar to extract the data you want after the fact, including averages.


Pete

[RAC_1]

glance -i

Will give you logical and physical i/o for file system. You would be better off with Perfview. If you have installed, it is very easy. Just start it and select appropriate metrics.

If you do not have that, you can still construct the glance adviser syntax for it and have it run every minute.

Anil

[Regina Mitchell]

Thanks for your recommendations. I will go the sar route and see what I come up with.

[Tim D Fulford]

MeasureWare... is the tool of choice!!!

extract -xp -gzd -b -e

the gzd will output globul, logical volume, abd per disk IO activity.

Tim