Re: SO_SNDBUF size is small on win32?

> -----Original Message-----
> From: pgsql-hackers-owner(at)postgresql(dot)org
> [mailto:pgsql-hackers-owner(at)postgresql(dot)org] On Behalf Of
> Martijn van Oosterhout
> On Wed, Jun 28, 2006 at 12:23:13AM +0900, Yoshiyuki Asaba wrote:
> > Hi,
> >
> > I see a performance issue on win32. This problem is causes by the
> > following URL.
> >
> > http://support.microsoft.com/kb/823764/EN-US/
> >
> > On win32, default SO_SNDBUF value is 8192 bytes. And
> libpq's buffer is
> > 8192 too.
>
> Ok, so there's a difficiency in Windows TCP code. Do you have any
> benchmarks to show this actually makes a difference. According to the
> URL you give, the problem occurs if the libpq buffer is *bigger* than
> the socket buffer, which it isn't...
>
The article also says there is a problem if they are the same size.

-rocco