Re: Very poor TCP/SACK performance
Savochkin Andrey Vladimirovich (saw@msu.ru)
Tue, 8 Sep 1998 16:37:11 +0400
On Tue, Sep 08, 1998 at 02:27:35PM +0100, Alan Cox wrote:
> > > and gues exercise but it turned out near enough right
> >
> > I'd suggest to increase the default receive buffer limit to about
> > 128K (admins who bother about it could tune it) and keep the send buffer
> > limit as it is.
>
> No. With a 32K window and set for a 64K limit 2.1.x should be fine by
> default. Looking at the 2.1.x code Im a bit confused it seems to be offering
> window == free space or am I missing something ?
Offering window can't shrink.
So when the socket buffer memory usage pattern has been changed
we offer more than we have. If the application eats
the data slowly and we receive more data than the available space
the queue is pruned...
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