[mapserver-users] Layer based on a view renders faster than if based on a table

[Steve.Toutant at inspq.qc.ca]

Daniel,
I already set this in the mapfile
  DEBUG 5 
  CONFIG MS_ERRORFILE "/ms4w/logs/mapserver.log"

I don't get the SQL query in the log though.

[Tue Dec 08 09:33:56 2009].961000 msDrawMap(): Layer 17 (RSSincidCumul), 
0.390s
[Tue Dec 08 09:33:56 2009].992000 msDrawMap(): Drawing Label Cache, 0.031s
[Tue Dec 08 09:33:56 2009].992000 msDrawMap() total time: 0.421s
[Tue Dec 08 09:33:57 2009].8000 msSaveImage() total time: 0.016s
[Tue Dec 08 09:33:57 2009].24000 mapserv request processing time 
(msLoadMap not incl.): 0.453s
[Tue Dec 08 09:33:57 2009].24000 msFreeMap(): freeing map at 01516C50.

Steve Toutant, M. Sc.
Analyste en géomatique
Secteur environnement
Direction de la santé environnementale et de la toxicologie
Institut national de santé publique du Québec
945, avenue Wolfe
Québec, Qc G1V 5B3 
Tél.: (418) 650-5115 #5281
Fax.: (418) 654-3144
steve.toutant at inspq.qc.ca
http://www.inspq.qc.ca
 




Daniel Morissette <dmorissette at mapgears.com>@lists.osgeo.org 
Envoyé par : mapserver-users-bounces at lists.osgeo.org
04/12/2009 05:05 PM

A
mapserver-users at lists.osgeo.org
cc

Objet
Re: [mapserver-users] Layer based on a view renders faster than if based 
on a table








Steve.Toutant at inspq.qc.ca wrote:
> 
> I thought that a layer definition based on a table would be much faster 
> than on a view.
> What should be the expected behavior please?
> 
> Please tell me is this should be asked to postgis forum.
> 

I'd suggest you capture the exact SQL query that is run in each case 
(using DEBUG/MS_ERRORFILE) and check that the difference in time indeed 
comes form the PostGIS queries.

If that's the case then you could submit a question to the postgis list 
based on that, taking MapServer out of the equation.

If on the other hand the queries take about the same time and the time 
difference is in MapServer's code (which I doubt) then we'd need more 
details (ideally a testcase) to be able to reproduce and troubleshoot 
the issue.

Daniel
-- 
Daniel Morissette
http://www.mapgears.com/
_______________________________________________
mapserver-users mailing list
mapserver-users at lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/mapserver-users



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/mapserver-users/attachments/20091208/2ec64695/attachment.htm>