Re: PostgreSQL, clusters and load-balance

On Tue, Mar 25, 2008 at 2:24 PM, Thomas Kellerer <spam_eater(at)gmx(dot)net> wrote:

> Bill Wordsworth wrote on 25.03.2008 19:16:
> > When traffic goes up, my webserver creates multiple instances of
> > postgresql.exe. At some basic level, aren't they similar to Oracle's RAC
> > "clusters", except that they are not aware of each other?
>
> No, absolutely not. Each client request is handled by a single postgres
> process
> which is spawned by the postmaster upon connection.

Thanks Joshua and Thomas. I guess my ignorance is showing :). Anyway, is
this spawning being done by postmaster or webserver or both? If postmaster,
does an application-level persistent connection request communicate itself
directly to the postmaster, and can the postmaster keep track of its
spawning?

Also, at some crude level, if I were to direct every alternate connection to
a different install box of postgresql, won't that help with *some*
load-balance?
Cheers, Bill