[postgis-users] Slow performance when selecting a geometry column

[Paul Ramsey]

SELECT Sum(ST_NPoints(geom)) FROM thetable;

On Thu, Mar 17, 2016 at 5:57 PM, David Robison <David.Robison at q-free.com>
wrote:

> I am having an issue with a postgis database with the time it takes to
> query the geometry column. The query selects 8000 records. The time to
> retrieve the records when not returning the geometry column is about 100ms.
> However, the time for the same query when requesting the geometry column
> takes about 9 seconds.  Any thoughts on how I can improve the performance
> reading the geometry column from a postgis database? I am using PostgreSQL
> 9.4 and Postgis 22.1.
>
> Thanks, David
>
>
>
> *David Robison*
>
> *Principal System Engineer*
>
> O. +1 757 546 3401
>
> M. +1 757 286 0022
>
> david.robison at q-free.com
>
> www.q-free.com/openroads
>
> [image: cid:image001.png at 01D15905.23A1F460]
>
> *Q-Free Open Roads*
>
> 103 Watson Road
>
> Chesapeake VA 23320
>
> [image: cid:image001.png at 01D15905.23A1F460]
>
> [image: cid:image002.png at 01D15905.23A1F460]
> ------------------------------
>
> This email communication (including any attachments) may contain confidential and/or privileged material intended solely for the individual or entity to which it is addressed.
> If you are not the intended recipient, please delete this email immediately.
>
>
>
>
>
> _______________________________________________
> postgis-users mailing list
> postgis-users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/postgis-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/postgis-users/attachments/20160317/69db9344/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 217 bytes
Desc: not available
URL: <http://lists.osgeo.org/pipermail/postgis-users/attachments/20160317/69db9344/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.png
Type: image/png
Size: 24511 bytes
Desc: not available
URL: <http://lists.osgeo.org/pipermail/postgis-users/attachments/20160317/69db9344/attachment-0001.png>