Re: System Monitor

[Gabriel Orozco <gabriel_orozco () mx sumida com>]

Hello Again

from another system on the network, also with Debian over ultrasparc 
hardware, we took the notice that is taking about 50% for irq.
this leaded me to check and I think I found the cause of the problem:

 PID USER     PRI  NI  VIRT   RES   SHR S CPU% MEM%   TIME+  Command
   3 root      18  19     0     0     0 S  0.0  0.0  0:00.00 ksoftirqd_CPU0


I think this process is the cause, and just noted that. Need to research 
in order to understand what happens with Linux over Sparc hardware for 
this to happend.

but IMHO this is a kind of "DoS" self-made...

More to follow,
in the mean time, thanks for all your answers

Gabriel

> Hello Every buddy
>
> I'm checking another computer on the network. thats has an stranger
> behavior. Let me explain
>
> This is a Linux/Debian computer installed some 9 days ago. Assigned user
> want to run Moodle on it.
> But they called me asking why with 40 users the server went to top
> processor and memory.
> Hardware is a Sun-Ultra, with 2GB of RAM, and plenty of scsi disk space...
>
> The problem:
> when I run "top" I have between 43% to 52% of processor used by "Sys"
> (System Tasks)
> and I cannot identify what is taking these process power.
> top does not give anything using the system
> nothing is being transfered (checked with iptraf)
> no disk usage (using iostat)
> no root kits, checked with ckrootkit some minutes ago
> no programs listening, checked with netstat
>
> I don't know which tool can help me to find the problem.
> I know there should be one and am surfing freshmeat.net, but I can
> happily accept any help you can give
>
> Thanks in advance
>
> Gabriel Orozco
>
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EARN A MASTER OF SCIENCE IN INFORMATION ASSURANCE - ONLINE
The Norwich University program offers unparalleled Infosec management 
education and the case study affords you unmatched consulting experience. 
Tailor your education to your own professional goals with degree 
customizations including Emergency Management, Business Continuity Planning, 
Computer Emergency Response Teams, and Digital Investigations. 

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