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Old 05-20-2008, 06:10 AM   #1
ajeetraina
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Slow Speed???


In one of my friend interview it was asked that "if Linux machine is in network and running slow.How gonna you check it?

Pls Help
 
Old 05-20-2008, 06:45 AM   #2
ChrisAbela
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It depends. Are the other applications also slow? Pinging could give hints. For me there are too many variables to reply. I hope someone else can give a better reply.
 
Old 05-20-2008, 07:21 AM   #3
Nathanael
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looks like some homework to me :-)
 
Old 05-20-2008, 07:33 AM   #4
b0uncer
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If it is homework, say that it is.

A better explanation overall would be great. Slow in what way? Network transfer speed slow, or cpu slow, or harddisk I/O slow, or something else going slow?
 
Old 05-20-2008, 08:38 AM   #5
thunyiwe
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I also say it depends, but you can use the top command to see whats killing ur machine resources or check running procceses using ps command

Last edited by thunyiwe; 05-20-2008 at 08:39 AM. Reason: spelling error
 
Old 05-20-2008, 08:44 AM   #6
Nathanael
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vmstat -1 is more acurate than top...
at least at finding out where the issue lies (IO net cpu mem...)
 
Old 05-20-2008, 07:13 PM   #7
fbianconi
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Quote:
looks like some homework to me :-)
well it does, but anyway he needs help. He is not asking you to do the homework, but he doesn't know where to begin. My advice: check google something like linux bencharking howto
and please read
How To Ask a Question
I think it's a summary of what Mr. Eric Raymond said about how to ask good questions.
 
Old 05-21-2008, 12:01 AM   #8
ajeetraina
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My Friend in reply said the following way:

"...First we need to check processes running thrugh #ps -auxf.
Inerviewer: If all the process status looks fine.
Friend: "...Then we should check with vmstat.."
Intrvwer: That too sounds fine.
Friend:"...then lets see firewalling...stuff".
Intrv: Firewall seems ok"...


What Could be the expected questions???
 
Old 05-21-2008, 01:18 AM   #9
Nathanael
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again! it depends WHAT is slow: processes on the computer or the network connection!

just - slow speed - is not enough info.

if all processes look fine, and there is not a lot of IO, then i would assume that it's the network connection in question (vmstat does _not_ show network details, and i would run vmstat before ps).

iptraf can give live information (also ntop, or monitoring with vnstat)
but then also if there is a look in the network, the computers connection will be slow.
and if they dont know what a loop is, tell them to take a hub and stick both ends of a network cable into it, and then attach it someone in the network!
 
  


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