Yep, the CPU was hogged and it is actually still so even with the DNS
working. The sshd process chews up over 95% CPU when someone logs in using
ssh2, though not for long when the reverse DNS lookup works. A 266MHz
Alpha is quite a lot faster than a uVAX though not exactly a speed
monster...;-) I can only assume that on an old VAX ssh2 would be
unbearably slow...

Cheers,
Anders

--
This mail was sent on Fri 04/29/05 at 11:43AM PDT


Punishment becomes ineffective after a certain point.  Men become
insensitive.
		-- Eneg, "Patterns of Force", stardate 2534.7

*************************************************************************
* Anders Hogrelius       Cell :  +46(0)70 884-2775, +46(0)70 677-0210
* Tessingatan 12         Phone:  +46(0)8 501-64524, +1(714)408-7868
* SE-72216 Vasteras      E-mail: anders@hogrelius.nu
* SWEDEN		 Web:    http://www.hogrelius.nu/~ahs/

On Thu, 28 Apr 2005, Marat BN wrote:

> Hi Anders,
>
> I'm experiencing this problem on Linux RedHat
> Enterprise Edition version 3.
> I know that this OS is pretty obsolete, and nobody
> should be using it now,
> but I don't have a choice here.  But at least I
> installed kernel 2.4.29 :)
> The openssh-server version is 3.5p1-6
>
> Do you remember if the Alpha with reverse DNS lookup
> problem hogged the CPU?
> I think the reason why it was making you wait 10 mins
> was because it was
> doing some network lookup.  Would reverse DNS lookup
> be a factor if I'm
> sshing to 127.0.0.1?  I'm doing ssh root@127.0.0.1
> when it hogs the CPU for
> several secs.
>
> Marat
>
>
> ----- Original Message -----
> From: "Anders Hogrelius" <ahs@hogrelius.nu>
> To: "M J Dowden" <mjdowden@panix.com>
> Cc: "Marat BN" <maratbn@yahoo.com>;
> <port-vax@NetBSD.org>
> Sent: Thursday, April 28, 2005 5:57 PM
> Subject: Re: RE: VERY slow ssh logins to uVAX
>
>
> >
> > Hmmm... I wonder if it could be related to the same
> kind of problem on
> > other platforms though it seem a bit extreme on the
> VAX. On the Alpha I've
> > had similar problems when the reverse lookup in the
> DNS didn't work. A
> > login could take 10's of minutes to complete, and
> when I fixed the DNS
> > problem the login quite fast.
> >
> > ...just a thought...It might be worthwile checking
> if it is related in
> > some way.
> >
> > Cheers,
> > Anders
> >
> > --
> > This mail was sent on Thu 04/28/05 at 5:53PM PDT
> >
> >
> > No problem is insoluble.
> > -- Dr. Janet Wallace, "The Deadly Years", stardate
> 3479.4
> >
> >
> *************************************************************************
> > * Anders Hogrelius       Cell :  +46(0)70 884-2775,
> +46(0)70 677-0210
> > * Tessingatan 12         Phone:  +46(0)8 501-64524,
> +1(714)408-7868
> > * SE-72216 Vasteras      E-mail: anders@hogrelius.nu
> > * SWEDEN Web:    http://www.hogrelius.nu/~ahs/
> >
> > On Thu, 28 Apr 2005, M J Dowden wrote:
> >
> >>
> >> At 3:58 PM -0700 4/28/2005, Marat BN wrote:
> >> >Hi,
> >> >
> >> >Came across your communications regarding this
> problem
> >> >at
> >>
> >http://mail-index.netbsd.org/port-vax/2003/02/11/0004.html
> >> >
> >> >I'm having the same problem here.  I have an
> automated
> >> >task which keeps
> >> >sshing into the server again and again every 30
> >> >seconds to confirm that the
> >> >SSH daemon is up and running.  The sshd is hogging
> 99%
> >> >of CPU at the time
> >> >the automated task or someone else logs in via
> SSH.
> >> >
> >> >I see your post is back from 2003.  I'd like to
> check
> >> >if since then you were
> >> >able to find the any possible causes and/or
> >> >workarounds to reduce this
> >> >problem?
> >>
> >>
> >>      Sorry, but no. I just stopped using ssh2 and
> went back to ssh1.
> >> The problem was simply that ssh2 in one version
> worked fine, but in
> >> the next version of the OS, it became unusably
> slow.
> >>
> >>
> >>      Best regards,
> >>      M J Dowden
> >>
> >>
> >> --
> >> M J Dowden <mjdowden@panix.com>
> >> PGP key:
> <http://www.panix.com/~mjdowden/keys.shtml>
> >> No Microsoft products were used in the preparation
> or transmission of
> >> this message
> >>
> >
>
>
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