Avatar of Xetroximyn
Flag for United States of America asked on

AIX 5.1 - how can I tell WHAT is maxxing out the disk?

Usually I know a couple things to look for and I know what is maxing out the disk when it happens.  But now it is getting maxed out and I'm not sure why.

Is there a way I can see what processes are using the most diskIO?
Unix OSLinux

Avatar of undefined
Last Comment

8/22/2022 - Mon

Log in or sign up to see answer
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform
Sign up - Free for 7 days
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
Not exactly the question you had in mind?
Sign up for an EE membership and get your own personalized solution. With an EE membership, you can ask unlimited troubleshooting, research, or opinion questions.
ask a question
Daniel McAllister

By "maxing out my disk" I presume you mean disk I/O utilization, and not storage....

The iostat utility should be able to give you what you need -- in particular, how much I/O wait time is being attributed to a disk device... from there, you should be able to track it to a running process.

NOTE: In my experience, sudden disk slowdowns are usually caused by failing drive hardware... the delays are because the default FS behavior is to retry the failing read/writes, causing a block.

Here's the link to the iostat command for AIX... its not a unique command, nor is it old or new... it's pretty much "standard *nix"

Good Luck!


Experts Exchange has (a) saved my job multiple times, (b) saved me hours, days, and even weeks of work, and often (c) makes me look like a superhero! This place is MAGIC!
Walt Forbes