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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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
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Computer Emergency Response Teams, and Digital Investigations.
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