[TriLUG] top-like command for monitoring disk I/O

[Howard Boyd]

IBM has a free tool called nmon (not officially supported) but it may do 
what you want. We run it on our AIX servers but it claims to run on Linux 
as well. You can find nmon at -> 
http://www-128.ibm.com/developerworks/aix/library/au-analyze_aix/

Howard

**************************************************************
* Then I realized that it is good and proper for a man to
* eat and drink, and to find satisfaction in his toilsome
* labor under the sun during the few days of life God has
* given him - for this is his lot. Moreover, when God gives
* any man wealth and possessions, and enables him to
* enjoy them, to accept his lot and be happy in his work -
* this is a gift of God. Ecclesiastes 5:18-19 NIV
**************************************************************



Alan Porter <porter at trilug.org> 
Sent by: trilug-bounces at trilug.org
22-02-07 10:07
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Subject
[TriLUG] top-like command for monitoring disk I/O







Yesterday, I noticed that gkrellm was showing a lot of disk activity on 
my system.  I was curious which process was doing all of the 
reads/writes, so I started snooping.  Of course, "top" tells me CPU 
usage.  Plus there's "vmstat", same info, different format.  I tried 
"lsof", but that just tells files that are open, not what's being 
accessed a lot.  When I googled for help, I ended up with a lot of tools 
like "df", "du" and "xdiskusage", which simply tell who's using the most 
space.

(1) What tools do you guys use to monitor disk I/O?  Or filesystem I/O?

(2) And while we're at it, what about tools to monitor network usage?

I've used "netwatch" and "iptraf", both curses-based monitors.  These 
show where the traffic is going, but I'm not sure if they show 
processes.  Of course, marry those with "netstat" and you can find out. 
Just curious if there are top-like programs to monitor network traffic 
(with PID's), too.



Alan



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