Re: upgraded to pgsql 8.2.4, getting worse performance then 7.4.x

On Sun, 2007-06-03 at 23:17 -0400, Tom Lane wrote:
> Douglas J Hunley <doug(at)hunley(dot)homeip(dot)net> writes:
> > On Saturday 02 June 2007 11:25:11 Tom Lane wrote:
> >> Another thing that seems strange is that the 8.2 config file does not
> >> seem to have been processed by initdb --- or did you explicitly comment
> >> out the settings it made?
>
> > I don't understand this comment. You are saying 'initdb' will make changes to
> > the file? The file I sent is the working copy from the machine in question.
>
> Yeah --- in a normal installation, initdb will provide un-commented
> entries for these postgresql.conf parameters:
>
> max_connections
> shared_buffers
> max_fsm_pages
> datestyle
> lc_messages
> lc_monetary
> lc_numeric
> lc_time
>
> (The first three are set dependent on SHMMAX probing, the others
> dependent on locale.) Your conf file doesn't seem to have been through
> that autoconfiguration step, which suggests someone poking at things
> they should have left alone.
>
> regards, tom lane
>
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A WAG, but perhaps the new conf file was overwritten after installation
with the one from the 'old' installation '..because that's the
configuration that we've already tweaked and was working...'