Re: Poor PPP performance and txqueuelen

From: Gregory Maxwell (greg@linuxpower.cx)
Date: Thu Jan 06 2000 - 23:40:15 EST


On Thu, 6 Jan 2000, Arthur Kelly wrote:

> >From the archives:
> >> If not, wouldn't it be better to keep txquueuelen high and
> >> just grin and bear the latency for interactive use?
> >
> > No you want it smaller, this makes packet loss feedback happen much
> > more quickly, and thus TCP's heuristics respond to the situation faster.
> >
> > David S. Miller
>
> That does not work well here. And it seems to contradict the ethernet
> default of 100 for txqueuelen.
[snip]

That will kill your interactive performance/other users of the link..

A bit better:

/sbin/tc qdisc add dev ppp0 root red ...

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