Re: [HACKERS] running two servers on one machine

Kurt Seel <kseel@utcorp.com> writes:
>  FreeBSD 3.2
>  Postgtres 6.5 and 6.5.3

>  I have 6.5 up and running. I am trying to bring up a second server,
> (6.5.3) on a different port. I have configured it into the compile process
> and also tried it from the command line. As soon as I start the
> second postmaster process, the main DB server starts refusing
> connactions.

I run two servers all the time, one production and one test.  (Right now
I actually have three going on this machine.)  AFAIK all you have to do
is make sure they are running with different data directories (-D switch
to postmaster) and port numbers (-p switch).  You can configure those
items at configure time, but it's not really necessary to do so.

What exactly is the behavior --- what error messages do you see in the
main server's log?  Can you connect to the alternate server?  Does it
show any error messages?

>  The second server is in a chroot'ed environment, so shared libs,
> data, etc is _absolutely_ separate.
>  Is shared memory my problem? How could I (temporarily) hack
> this until our compatability testing is complete?

chroot is certainly not necessary, and I doubt shared memory is the
issue either, unless maybe you are exceeding your kernel's configuration
limit.  (But that should mean that the second postmaster is unable to
start...)
        regards, tom lane