Comments on: iotop: Per Process I/O Usage

By: davieshall1

davieshall1 — Mon, 24 Dec 2012 11:26:03 +0000

My test system wasn’t doing any I/O so toggling the system from Figure 2 shows nothing so I’m not showing it. However, This was really something very special and interesting. http://dissertation-masters.co.uk

By: ttt

ttt — Sat, 06 Oct 2012 17:35:54 +0000

I see no processes getting listed in the o/p window of IOtop. However, the overall system usage is shown correctly on the first line of the o/p. Any idea what is going on.

By: shyam yeduru

shyam yeduru — Tue, 19 Jun 2012 08:24:30 +0000

Good article.

By: moncler

moncler — Thu, 01 Dec 2011 10:52:48 +0000

Thanks for another wonderful article. Where else may just anybody get that kind of information in such a perfect approach of writing? I’ve a presentation subsequent week, and I’m on the look for such info.

By: Dr. Kenneth Noisewater

Dr. Kenneth Noisewater — Fri, 04 Nov 2011 17:53:56 +0000

Where in htop does it show I/O read/write/swap/wait per-process?

By: rcxb

rcxb — Mon, 10 Oct 2011 11:02:57 +0000

I must have missed the list of “interesting capability that we haven’t found in other tools.” Seems pretty ho-hum, and a lot of hassle. Meanwhile, htop is very user-friendly, has some interface capabilities that make it useful when “top” is struggling, and works out of the box on RHEL5/6 without tweaking the kernel (from the rpmforge repo).

By: adamhough

adamhough — Wed, 17 Aug 2011 21:51:47 +0000

http://nmon.sourceforge.net/pmwiki.php

Nmon is the tool that most of you are looking for with a combines resource utilization monitors but is easier to view the information then atop and other ones. This is a utility out of the AIX system environment.

By: Badarinarayan joshi

Badarinarayan joshi — Wed, 29 Jun 2011 14:01:50 +0000

It may work on RHEL but on ubuntu it complains that kernel is not enabled with CONFIG_TASK_DELAY_ACCT

By: grdetil

grdetil — Thu, 02 Jun 2011 18:11:50 +0000

I agree with illtud that iotop and python-ctypes install fine from the epel repo with no kernel config needed. I did this on Scientific Linux 5.5 (RHEL 5.5 clone).

If you try atop as vtchernev suggested, which I got from the dag/rpmforge repo, be aware that it causes an obscure issue with SELinux. I started getting a whole bunch of setroubleshoot messages of ‘SELinux is preventing dovecot-auth (dovecot_auth_t) “getattr” to / (fs_t).’ and ‘SELinux is preventing unix_update (updpwd_t) “getattr” to / (fs_t).’ I scratched my head a long time over these until I realized the errors started minutes after installing atop. I shut down the atop service and the errors stopped. Whatever it’s doing to hook into these processes to do its accounting, the current SELinux policy isn’t happy about it.

By: alexeik

alexeik — Thu, 19 May 2011 16:17:42 +0000

Many thanks for posting the articles about the very valuable tools for linux admins, iotop and iostat. The installation steps, perhaps, should have been skipped as they are distribution dependent, for example, on Ubuntu and Debian,
iotop comes as a package and can be simply installed by
apt-get install iotop

By: dmesg

dmesg — Thu, 19 May 2011 13:40:01 +0000

I second the idea of combining these tools into a single interface. If I had any coding skills this is the very task I would take on, and I’d include a few other tools to monitor network resources like per client I/O.

One of the tools I use a lot is iptstate. I’ve fantasized about using it’s output to identify clients, which are then correlated with other performance data.

But when it comes to coding, I’d drown in 2 inches of water in a bathtub. I’m just a lowly network admin.

By: vtchernev

vtchernev — Thu, 19 May 2011 13:35:44 +0000

You might want to have a look at atop. The best monitoring tool I have used up until now. Works well with recent kernels.

By: Illtud Daniel

Illtud Daniel — Thu, 19 May 2011 12:22:35 +0000

Skip the building bit, install the EPEL repo and ‘yum install iotop’. Works on my RHEL5.6 boxes and didn’t need to change kernel.