Yeah: ST is designed for network apps, and its for network bound apps that
you
gain the most performance - but by using it to allow
a child process to hold multiple connections and accept/return data to
those connections simultaneously, I forsaw a potential performance
improvement...
*shrug* Most connections remain idle most of thier life... yes?
the SGI folks developed this library as part of a project to make apache
faster (http://aap.sourceforge.net/) - multiple child
processes as normal, but allowed multiple connections per child.
And although the performance improvements they got were greatest on irix,
performance was improved upto 70% on linux. Some of this was from QSC
(http://aap.sourceforge.net/mod_qsc.html) , however...
just some food for thought.
----- Original Message -----
From: "Neil Conway" <nconway@klamath.dyndns.org>
To: "Jon Franz" <coventry@one.net>
Cc: <pgsql-hackers@postgresql.org>
Sent: Wednesday, June 05, 2002 8:05 PM
Subject: Re: [HACKERS] Roadmap for a Win32 port
> On Wed, 5 Jun 2002 18:50:46 -0400
> "Jon Franz" <coventry@one.net> wrote:
> > One note: SGI developers discovered they could get amazing performance
using
> > as hybrid threaded and forked-process model with apache - we might want
to
> > look into this. They even have a library for network-communication
> > utilizing thier 'state threads' model.
>
> I think ST is designed for network I/O-bound apps -- last I checked,
> disk I/O will still block an entire ST process. While you can get around
> that by using another process to do disk I/O, it sounds like ST won't be
> that useful.
>
> However, Chris KL. (I believe) raised the idea of using POSIX AIO for
> PostgreSQL. Without having looked into it extensively, this technique
> sounds promising. Perhaps someone who has looked into this further
> (e.g. someone from Redhat) can comment?
>
> Cheers,
>
> Neil
>
> --
> Neil Conway <neilconway@rogers.com>
> PGP Key ID: DB3C29FC
>
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