[postgis-users] Optimizer guess makes query 1000x slower?

[strk]

On Tue, Jun 15, 2004 at 09:13:34AM -0700, rm_postgis at cheapcomplexdevices.com wrote:
> 
> On Tue, 15 Jun 2004, strk wrote:
> > 
> > update_geometry_stats() needs always be run manually.
> > automatic statistics gathering for custom operators is available
> > from postgresql 75 only.
> 
> Thanks!
> 
> Wonder if it'd be good to add this note to the postgis docs
> page that talks about indexes:
>   http://postgis.refractions.net/docs/x511.html
> I kinda would have expected to see that information there.

I've added documentation about update_geometry_stats()
and VACUUM ANALYZE.

--strk;

> 
> > A curiosity, how many geometry records are there ?
> 
> This table has 59000 geometry records, all in 12 cities.  The
> table I was joining it with had about 10000 records.
> 
> ronmap=# select count(*) from cpal_events;
>  count 
> -------
>  58890
> (1 row)
> 
> ronmap=# select count(*) from geometry_columns;
>  count 
> -------
>     27
> (1 row)
> 
> Thanks again for your help!  
> The database is working very well right now!
> 
>    Ron
>