Re: Perl + Determine active connections on Pg 8.0.x and Pg 8.2.x

> > We have Pg 8.0.x and Pg 8.2.x on 2 separate Linux servers. We have a
> perl
> > script (perl 5.8.7, DBI-1.48/DBD::Pg-1.49) that connects to each
> > database to
> > determine if there are active connections.with the following query.
> > SELECT count(*) from pg_stat_activity;
> >
> > The above query always returns 0 rows for Pg 8.0.x and 1 row for Pg
> 8.2.x.
> >
> > When we connect to the database using psql client, the above query
> > returns 1
> > row for both the databases.
>
> The pg_stat_activity view is never completely up-to-date, there is
> always some time lag. This means whether you see your own connection
> will depend on the precise order of events. Try sleep()ing for a second
> before issuing the query and see if that makes it go away. If so, it's
> just timing problems.
>
> I've seen similar with "ps auxw | grep foo" from the command-line.
>

Thanks! sleep 1; works like a charm on both the databases.