JP Vossen on 7 Jan 2009 21:21:00 -0800

[Date Prev] [Date Next] [Thread Prev] [Thread Next] [Date Index] [Thread Index]

Re: [PLUG] Monitoring I/O by process

 > Date: Wed, 7 Jan 2009 16:16:02 -0500
 > From: Matthew Rosewarne <>
> Quite a while ago at the central meeting, someone asked whether it 
> was possible to find out which processes were thrashing a machine's
 > disk. The answer was that it was not possible to actually know which
 > process was using the disk due to the way the kernel manages I/O.
 > However, there apparently has been a way to monitor I/O by process
 > The "iotop" tool uses this information to display how much I/O each
 > process is using. I find it quite useful in finding resource hogs,
 > since I'm more often limited by my disk than my CPU.

That's really good to know.  I've asked myself that question a few 
times, and got all excited the other day when reading the _Absolute 
FreeBSD_ book, since per page 579 FreeBSD top(1) has an I/O mode (that 
at least superficially looks a lot like the output from iotop).  Boy was 
I bummed when I realized that Linux top doesn't have that.

JP Vossen, CISSP            |:::======|
My Account, My Opinions     |=========|
"Microsoft Tax" = the additional hardware & yearly fees for the add-on
software required to protect Windows from its own poorly designed and
implemented self, while the overhead incidentally flattens Moore's Law.
Philadelphia Linux Users Group         --
Announcements -
General Discussion  --