[postgis-users] Status of PostGIS 3 and PostgreSQL Yum Repos?

[Daryl Herzmann]

Thanks for the response Raúl,

I tried PostGIS 3.0 GA now on RHEL7 and am still seeing the same
puzzling slow behaviour.  My RHEL8 development laptop crunches the
same data through ST_Transform() in excellent time.  Here's a
comparison of the explain analyze on both hosts

RHEL7

 POSTGIS="3.0.0 r17983" [EXTENSION] PGSQL="120"
GEOS="3.8.0-CAPI-1.13.1 " PROJ="6.2.0" LIBXML="2.9.1" LIBJSON="0.11"
LIBPROTOBUF="1.0.2" WAGYU="0.4.3 (Internal)"

explain analyze select st_transform(geom, 2163) from stations;
                                                             QUERY
PLAN
-------------------------------------------------------------------------------------------------------------------------------------
 Gather  (cost=1000.00..113124.15 rows=69980 width=32) (actual
time=3535.920..4624.442 rows=70025 loops=1)
   Workers Planned: 1
   Workers Launched: 1
   ->  Parallel Seq Scan on stations  (cost=0.00..105126.15 rows=41165
width=32) (actual time=4061.506..4104.824 rows=35012 loops=2)
 Planning Time: 0.057 ms
 Execution Time: 4627.474 ms


RHEL8

 POSTGIS="3.0.0 r17983" [EXTENSION] PGSQL="120"
GEOS="3.8.0-CAPI-1.13.1 " PROJ="6.2.0" LIBXML="2.9.7" LIBJSON="0.13.1"
LIBPROTOBUF="1.3.0" WAGYU="0.4.3 (Internal)"

explain analyze select st_transform(geom, 2163) from stations;
                                                           QUERY PLAN
---------------------------------------------------------------------------------------------------------------------------------
 Gather  (cost=1000.00..112529.32 rows=69618 width=32) (actual
time=46.818..90.248 rows=69618 loops=1)
   Workers Planned: 1
   Workers Launched: 1
   ->  Parallel Seq Scan on stations  (cost=0.00..104567.52 rows=40952
width=32) (actual time=49.211..72.335 rows=34809 loops=2)
 Planning Time: 0.036 ms
 Execution Time: 91.871 ms


I don't have an exact copy of the data between the two hosts, but it is close.

thanks
daryl

On Wed, Oct 30, 2019 at 8:58 AM <rmrodriguez at carto.com> wrote:
>
> The are waiting for GDAL 3.0.2 to be out to package them together.
> Source: https://twitter.com/DevrimGunduz/status/1189216750895882243
>
> In any case, ST_Transform is slower because PROJ6 is slower, but it
> shouldn't be that slow.
>
> On Wed, Oct 30, 2019 at 2:54 PM Daryl Herzmann <akrherz at gmail.com> wrote:
> >
> > Greetings,
> >
> > Does anybody know what's going on with the PostgreSQL Yum repos
> > supporting PostGIS 3?  The repos continue to be stuck with 3.0 alpha4
> >
> > https://yum.postgresql.org/12/redhat/rhel-7-x86_64/
> >
> > I am having issues with performance with that alpha4 release and am
> > hoping they magically go away with the GA release of version 3 :)
> >
> > https://redmine.postgresql.org/issues/4826
> >
> > Is there some public interface to see the build status results of these RPMs?
> >
> > thanks
> > daryl
> > _______________________________________________
> > postgis-users mailing list
> > postgis-users at lists.osgeo.org
> > https://lists.osgeo.org/mailman/listinfo/postgis-users
>
>
>
> --
> Raúl Marín Rodríguez
> carto.com
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