Slow performance as root over SSH?

Kris Kennaway kris at
Mon Apr 14 16:41:05 UTC 2008

Edward Ruggeri wrote:
> On Mon, Apr 14, 2008 at 9:29 AM, Kris Kennaway <kris at> wrote:
>> Edward Ruggeri wrote:
>>> Recently, I figured to do this with portupgrade.  Now, I don't allow
>>> root login, so I log in as a user in the wheel group and use su.  Now,
>>> as root, I run: dtach -A portupgrade -a.  It starts working, but
>>> extremely slowly.  For instance, "portsnap fetch update" takes several
>>> minutes, whereas it normally is blazing fast when performed locally.
>>> I can still detach, exit root, and close the SSH tunnel.  I suppose
>>> this is probably a dtach performance issue?
>>  Likely unrelated to either.  There is nothing that would make root perform
>> any differently than other users, and dtach only affects the terminal
>> handling and not any other aspect of the system.
>>  Kris
> Thanks Kris!
> Well, that's what I would have expected.  But then what explains the
> difference in performance?  The only other difference I can imagine is
> that I am logging in with a wheel account and using su, rather than
> logging in as root.  Being something of a novice still, could that be
> the issue?

No.  Unless dtach is doing something bizarre I cannot think of a reason 
this would be happening.


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