[Cialug] Network slowness

[Tom Sellers]

--- On Thu, 2/5/09, John Lengeling <John.Lengeling at radisys.com> wrote:

> From: John Lengeling <John.Lengeling at radisys.com>
> Subject: RE: [Cialug] Network slowness
> To: "Central Iowa Linux Users Group" <cialug at cialug.org>
> Date: Thursday, February 5, 2009, 12:23 PM
> Now if we had the strace from when you were at home, we
> could compare it
> side-by-side and see what is different.  So run the strace
> from home.

I have attached both the home and work files to this message.  Not sure if you saw both together before since I did not see any response after this messge.  
> 
> I don't know if other distros have different commands,
> but for
> RedHat/Fedora/CentOS, the commands to turn on the name
> service cache
> daemon are:
> 
> /sbin/chkconfig nscd on         <= so it will start at
> boot time
> /sbin/service nscd start 	 <= to start nscd immediately
> without a
> reboot
> /sbin/service nscd restart     <= stop/start nscd
> /sbin/service ncsd stop          <= to stop nscd
> 
> Run the chkconfig command above and try the "service
> nscd restart".
> 
> Again you need to perform these tests at home where you see
> the broken
> behavior. 

I was not successful in identifying the ncsd daemon on my machine
  
> 

> > From: John Lengeling
> <John.Lengeling at radisys.com>
> > Subject: RE: [Cialug] Network slowness
> > To: "Central Iowa Linux Users Group"
> <cialug at cialug.org>
> > Date: Thursday, February 5, 2009, 8:59 AM
> > So this IMHO is pointing directly to some issue with
> the
> > resolver since
> > it is bypassed when you used the IP address on the
> ping and
> > you didn't
> > see a problem.
> > 
> > I would try two things:
> > 
> > 1. I would run the system call tracer strace(1) and
> see if
> > reveals
> > anything.  Run "strace ping IPADDR"
> > 
> > 2. The only other thing that could be involved is the
> name
> > service cache
> > daemon (nscd).   Maybe it is busted or turned off.
> > 
> > If it is off, I would recommend turning it on and then
> > retry your tests.
> > If it is on, you might try turning it off and see if
> that
> > affects your
> > times.
> > 
> > johnl
> > 



      
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