I had a similar problem once. It was so funny. I was working with a
customer. We were at his desk using a sniffer. We kept seeing huge amounts
of traffic to and from the server. So he would run into the server room,
move the mouse and check a couple things, and come back. While he was gone,
the traffic stopped! But then it started up again in a couple minutes. It
was a screen saver. I can't remember why the screen saver used network
bandwidth, but it did!
Regarding the original poster's question about the slow server: It probably
doesn't have anything to do with the network, actually, but you would have
to use a sniffer and other troubleshooting tools to know for sure. There are
many tools that could help you analyze the server performance, depending on
the OS, including netstat, chkconfig, lsof, Big Brother, etc.
With a sniffer, you can often tell if the problem is the network or the
server. If you're sniffing at a client and you see the server respond at the
transport layer quickly, with a TCP ACK for example, but take a long time to
actually send any data, blame the server and the applications on it. The ACK
arrived with no problem which exonerates the TCP/IP stack and the network.
Someone said to check full/half duplex. One thing you could do to lessen the
demand on the server is to purposely use half duplex. That way the server
isn't expected to send data while receiving. It also throttles the requests
to the server and makes the perceived performance better in some cases.
___
Priscilla Oppenheimer
www.troubleshootingnetworks.com
www.priscilla.com
Symon Thurlow wrote:
>
> Slightly OT
>
> I had a site once that had an HP LH3 (or something similar)
> server that
> had an absolute crap video card. Whenever I wasn't there,
> performance
> was poor. Whenever I was on site, performance was good.
>
> It turned out to be the 3D screen saver that someone had
> configured was
> killing the server. It affected the process that these people
> used
> (probably a driver problem or something) so I changed the
> screen saver
> to a marquee and everything was fine.
>
> Don't know if this is relevant to you but worth a look.
>
> Symon
>
> -Original Message-
> From: Steve [mailto:[EMAIL PROTECTED]
> Sent: 04 March 2003 01:00
> To: [EMAIL PROTECTED]
> Subject: Re: Networking problem [7:64012]
>
>
> Do use half duplex also what are you doing when its slow
> specifically?
>
> is the server slow accessing computers on the network and
> taking files
> or is it slow accessing the internet?
>
>
>
>
> ""Orlando, Jr. Palomar"" wrote in message
> news:[EMAIL PROTECTED]
> > Adeboye Onifade wrote:
> > > Server.
> > > The
> > > server is a Pentium 3, 128MB changed to 256, it's also on
> full
> > > duplex on the switch/ hubs etc could anyone advise on
> how to
> > > make the server more efficient!
> >
> > You can't configure full-duplex when connecting to a hub.
> Probably
> explains
> > the problems you're having.
> =
>
> This email has been content filtered and
> subject to spam filtering. If you consider
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>
> =
>
>
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