Re: postmaster restart on a different dataDir

Actually I found the answer....pg_ctl supports a -w switch which waits for
the start operation to complete.

Decibel...without -w, pg_ctl will return immediately before postmaster is
fully operational. If you don't believe me start the engine and try to
connect to it right away with pgsql(1)...

Cheers for now
Medi

On 8/14/07, Decibel! <decibel(at)decibel(dot)org> wrote:
>
> On Mon, Aug 13, 2007 at 04:05:37PM -0700, Medi Montaseri wrote:
> > Hi,
> >
> > I am trying to measure startup time of postmaster. Say I have postmaster
>
> Why?
>
> > running on -D /tmp/d1 and would like to restart it on -D /tmp/d2.
> >
> > If I just say
> > time pg_ctl restart -D /tmp/d2
> > it will not produce an accurate result because pg_ctl will start
> postmaster
> > in the background and return immediately but if you query the engine
> right
> > away, you'll see that it is not ready yet as in
> > time ( pg_ctl restart -D /tmp/d2 ; psql -l )
> >
> > If I call postmaster, then the command is blocking waiting for
> postmaster to
> > exit.
>
> So let it stop, start the timer, then start it again.
> --
> Decibel!, aka Jim Nasby decibel(at)decibel(dot)org
> EnterpriseDB http://enterprisedb.com 512.569.9461 (cell)
>
>