Re: Slow linux server

[Alan Wilson <awilson@accessus.net>]

On Thu, 7 Oct 1999, Walker West wrote:

> 
> Alan:
> 
> I'm a lurker on the SILUG mailing list; I was a member of the EASUG
> group that Steve started in Evansville.  I've had the same problem when
> the client machines weren't set up in reverse DNS or the hosts file. 
> Just to experiment, try adding one of the workstations to your hosts
> file and then telnet in from that client.

Actually, you might have hit the nail on the head.  Later today I got to
looking through the logs and the machine spent quite a bit of time trying to
hit a non-existant name server.  Kaskaskia College had to change the ip's of
all the machines on campus including its local nameserver which does the
reverse DNS.  After I changed the DNS server on the slow machine, it speeded
up quite a bit.

Thanks
Alan


> 
> --Walker
> 
> Alan Wilson wrote:
> > 
> > We have RH5.2 installed on a machine in a classroom where they teach html,
> > etc.  Recently the machine has slowed to a crawl.  I have no clue.
> > 
> > for example, if I ping the machine from my desk, I get under 10ms time; but if
> > I telnet to it, I get a connect message very quickly, but it takes 80 to 90
> > seconds to get a login prompt.
> > 
> > If I ftp to the machine, it may take over 120 seconds to get a reply if the
> > client I am using doesn't time out.
> > 
> > In both cases, after I connect the speed is good.
> > 
> > The traffic on the network is not that heavy (as checked by a packet sniffer).
> > My connection is ethernet to the Linux machine (no modems).
> > 
> > Top suggests 70% or better idle on the cpu.
> > 
> > Other confusing things: samba used to advertise the machine on the network,
> > but doesn't anymore.  I am not really too worried about samba as I seem to be
> > one of the very few people with Microsoft Client installed on their machine.
> > 
> > A connect to the Apache web server on the machine is quick.
> > 
> > I don't really have any clue as to what might slow the thing down.
> > Suggestions?
> > 
> > Thanks
> > Alan
> > 
> > --
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> 
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