WMS performance

[Paul Meems]

Hi,

I'm new to this list. I'm Paul I'm from The Netherlands and I'm in the process of making a simple WebGIS with just viewing capabilities.
I have a cloud server running Ubunto. GeoServer v2.1.3 and PostGreSQL v9.1 with PostGIS.

All is running well except for the performance. It takes very long to show my WMS data in OpenLayers.
I have enabled GeoWebCache and am using tiled: true, format: 'image/png8' and palette: 'safe'.

I have pre-seeded my layer and I see on the Cached Layers page of the GeoServer admin that it is using 44MB.
So far so good, but somehow I'm not certain my OpenLayers application is using these tiles. Also because I would suspect that even if I didn't seeded correctly the tiles would be generated on the fly.
And thus following visits to my page would be faster. But my initial start at zoom level 12 and I need 46 tiles, this takes between 2.5 and 3 minutes to load.
Much to slow!
The tile sizes are from 35kB - 290b.
This is the request I make;
http://myIP/geoserver/myApp/wms?LAYERS=myLayername&FORMAT=image%2Fpng8&TRANSPARENT=TRUE&PALETTE=safe&TILED=true&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&SRS=EPSG%3A3857&BBOX=728903.50162598,6980840.9182568,733795.47143555,6985732.8880664&WIDTH=256&HEIGHT=256

I tried looking for the tiles on my Ubunto server. I was expected a directory structure with a lot of subdirs with numbers (zoomlevels, X and Y) and eventually the png files.
But I can't find it. I must say I'm still a novice with Ubuntu so I might not be searching correctly or the tiles are not saved to disk.

Can anybody point me in the correct direction about solving this performance issue?

Thanks,

Paul

--
Organizing the International Open Source GIS conference 2012 in The Netherlands:
http://www.mapwindow.org/conference/2012/
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[Imran Rajjad]

can you please post your openlayers code for that cached layer? and what j2ee container are you using?

regards,

Imran

On Mon, May 7, 2012 at 5:05 PM, Paul Meems <[hidden email]> wrote:

Hi,

I'm new to this list. I'm Paul I'm from The Netherlands and I'm in the process of making a simple WebGIS with just viewing capabilities.
I have a cloud server running Ubunto. GeoServer v2.1.3 and PostGreSQL v9.1 with PostGIS.

All is running well except for the performance. It takes very long to show my WMS data in OpenLayers.
I have enabled GeoWebCache and am using tiled: true, format: 'image/png8' and palette: 'safe'.

I have pre-seeded my layer and I see on the Cached Layers page of the GeoServer admin that it is using 44MB.
So far so good, but somehow I'm not certain my OpenLayers application is using these tiles. Also because I would suspect that even if I didn't seeded correctly the tiles would be generated on the fly.
And thus following visits to my page would be faster. But my initial start at zoom level 12 and I need 46 tiles, this takes between 2.5 and 3 minutes to load.
Much to slow!
The tile sizes are from 35kB - 290b.
This is the request I make;
http://myIP/geoserver/myApp/wms?LAYERS=myLayername&FORMAT=image%2Fpng8&TRANSPARENT=TRUE&PALETTE=safe&TILED=true&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&SRS=EPSG%3A3857&BBOX=728903.50162598,6980840.9182568,733795.47143555,6985732.8880664&WIDTH=256&HEIGHT=256

I tried looking for the tiles on my Ubunto server. I was expected a directory structure with a lot of subdirs with numbers (zoomlevels, X and Y) and eventually the png files.
But I can't find it. I must say I'm still a novice with Ubuntu so I might not be searching correctly or the tiles are not saved to disk.

Can anybody point me in the correct direction about solving this performance issue?

Thanks,

Paul

--
Organizing the International Open Source GIS conference 2012 in The Netherlands:
http://www.mapwindow.org/conference/2012/
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threat landscape has changed and how IT managers can respond. Discussions
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threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
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[Paul Meems]

Thanks Imran,

After writing my mail to this list I've continued trying and found that if I don't use palette: 'safe' in OpenLayers the speed is as expected: fast.
The size of the tiles grow a bit (20%) but the overall speed improvement is huge.

I don't have a specific reason the use the palette option, I just came across it while learning OL.

I still want to know where the tiles go to on the server, just to understand it better.

Thanks,

Paul
--
Organizing the International Open Source GIS conference 2012 in The Netherlands:
http://www.mapwindow.org/conference/2012/

2012/5/7 Imran Rajjad <[hidden email]>

can you please post your openlayers code for that cached layer? and what j2ee container are you using?

regards,

Imran

On Mon, May 7, 2012 at 5:05 PM, Paul Meems <[hidden email]> wrote:

Hi,

I'm new to this list. I'm Paul I'm from The Netherlands and I'm in the process of making a simple WebGIS with just viewing capabilities.
I have a cloud server running Ubunto. GeoServer v2.1.3 and PostGreSQL v9.1 with PostGIS.

All is running well except for the performance. It takes very long to show my WMS data in OpenLayers.
I have enabled GeoWebCache and am using tiled: true, format: 'image/png8' and palette: 'safe'.

I have pre-seeded my layer and I see on the Cached Layers page of the GeoServer admin that it is using 44MB.
So far so good, but somehow I'm not certain my OpenLayers application is using these tiles. Also because I would suspect that even if I didn't seeded correctly the tiles would be generated on the fly.
And thus following visits to my page would be faster. But my initial start at zoom level 12 and I need 46 tiles, this takes between 2.5 and 3 minutes to load.
Much to slow!
The tile sizes are from 35kB - 290b.
This is the request I make;
http://myIP/geoserver/myApp/wms?LAYERS=myLayername&FORMAT=image%2Fpng8&TRANSPARENT=TRUE&PALETTE=safe&TILED=true&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&SRS=EPSG%3A3857&BBOX=728903.50162598,6980840.9182568,733795.47143555,6985732.8880664&WIDTH=256&HEIGHT=256

I tried looking for the tiles on my Ubunto server. I was expected a directory structure with a lot of subdirs with numbers (zoomlevels, X and Y) and eventually the png files.
But I can't find it. I must say I'm still a novice with Ubuntu so I might not be searching correctly or the tiles are not saved to disk.

Can anybody point me in the correct direction about solving this performance issue?

Thanks,

Paul

--
Organizing the International Open Source GIS conference 2012 in The Netherlands:
http://www.mapwindow.org/conference/2012/

------------------------------------------------------------------------------
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threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
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threat landscape has changed and how IT managers can respond. Discussions
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[Imran Rajjad]

the tiles are in your datadir/gwc .. you can verify it. can you show the openlayers source, which you are using to access the cached layer? secondly what container are you using?

regards,

Imran

On Mon, May 7, 2012 at 6:40 PM, Paul Meems <[hidden email]> wrote:

Thanks Imran,

After writing my mail to this list I've continued trying and found that if I don't use palette: 'safe' in OpenLayers the speed is as expected: fast.
The size of the tiles grow a bit (20%) but the overall speed improvement is huge.

I don't have a specific reason the use the palette option, I just came across it while learning OL.

I still want to know where the tiles go to on the server, just to understand it better.

Thanks,

Paul
--
Organizing the International Open Source GIS conference 2012 in The Netherlands:
http://www.mapwindow.org/conference/2012/

2012/5/7 Imran Rajjad <[hidden email]>

can you please post your openlayers code for that cached layer? and what j2ee container are you using?

regards,

Imran

On Mon, May 7, 2012 at 5:05 PM, Paul Meems <[hidden email]> wrote:

Hi,

I'm new to this list. I'm Paul I'm from The Netherlands and I'm in the process of making a simple WebGIS with just viewing capabilities.
I have a cloud server running Ubunto. GeoServer v2.1.3 and PostGreSQL v9.1 with PostGIS.

All is running well except for the performance. It takes very long to show my WMS data in OpenLayers.
I have enabled GeoWebCache and am using tiled: true, format: 'image/png8' and palette: 'safe'.

I have pre-seeded my layer and I see on the Cached Layers page of the GeoServer admin that it is using 44MB.
So far so good, but somehow I'm not certain my OpenLayers application is using these tiles. Also because I would suspect that even if I didn't seeded correctly the tiles would be generated on the fly.
And thus following visits to my page would be faster. But my initial start at zoom level 12 and I need 46 tiles, this takes between 2.5 and 3 minutes to load.
Much to slow!
The tile sizes are from 35kB - 290b.
This is the request I make;
http://myIP/geoserver/myApp/wms?LAYERS=myLayername&FORMAT=image%2Fpng8&TRANSPARENT=TRUE&PALETTE=safe&TILED=true&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&SRS=EPSG%3A3857&BBOX=728903.50162598,6980840.9182568,733795.47143555,6985732.8880664&WIDTH=256&HEIGHT=256

I tried looking for the tiles on my Ubunto server. I was expected a directory structure with a lot of subdirs with numbers (zoomlevels, X and Y) and eventually the png files.
But I can't find it. I must say I'm still a novice with Ubuntu so I might not be searching correctly or the tiles are not saved to disk.

Can anybody point me in the correct direction about solving this performance issue?

Thanks,

Paul

--
Organizing the International Open Source GIS conference 2012 in The Netherlands:
http://www.mapwindow.org/conference/2012/

------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
Geoserver-users mailing list
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threat landscape has changed and how IT managers can respond. Discussions
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threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
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threat landscape has changed and how IT managers can respond. Discussions
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[Paul Meems]

Thanks Imran,

I'm using Tomcat and I've attached part of my source code.

Thanks,

Paul
--
Organizing the International Open Source GIS conference 2012 in The Netherlands:
http://www.mapwindow.org/conference/2012/

2012/5/7 Imran Rajjad <[hidden email]>

the tiles are in your datadir/gwc .. you can verify it. can you show the openlayers source, which you are using to access the cached layer? secondly what container are you using?

regards,

Imran

On Mon, May 7, 2012 at 6:40 PM, Paul Meems <[hidden email]> wrote:

Thanks Imran,

After writing my mail to this list I've continued trying and found that if I don't use palette: 'safe' in OpenLayers the speed is as expected: fast.
The size of the tiles grow a bit (20%) but the overall speed improvement is huge.

I don't have a specific reason the use the palette option, I just came across it while learning OL.

I still want to know where the tiles go to on the server, just to understand it better.

Thanks,

Paul
--
Organizing the International Open Source GIS conference 2012 in The Netherlands:
http://www.mapwindow.org/conference/2012/

2012/5/7 Imran Rajjad <[hidden email]>

can you please post your openlayers code for that cached layer? and what j2ee container are you using?

regards,

Imran

On Mon, May 7, 2012 at 5:05 PM, Paul Meems <[hidden email]> wrote:

Hi,

I'm new to this list. I'm Paul I'm from The Netherlands and I'm in the process of making a simple WebGIS with just viewing capabilities.
I have a cloud server running Ubunto. GeoServer v2.1.3 and PostGreSQL v9.1 with PostGIS.

All is running well except for the performance. It takes very long to show my WMS data in OpenLayers.
I have enabled GeoWebCache and am using tiled: true, format: 'image/png8' and palette: 'safe'.

I have pre-seeded my layer and I see on the Cached Layers page of the GeoServer admin that it is using 44MB.
So far so good, but somehow I'm not certain my OpenLayers application is using these tiles. Also because I would suspect that even if I didn't seeded correctly the tiles would be generated on the fly.
And thus following visits to my page would be faster. But my initial start at zoom level 12 and I need 46 tiles, this takes between 2.5 and 3 minutes to load.
Much to slow!
The tile sizes are from 35kB - 290b.
This is the request I make;
http://myIP/geoserver/myApp/wms?LAYERS=myLayername&FORMAT=image%2Fpng8&TRANSPARENT=TRUE&PALETTE=safe&TILED=true&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&SRS=EPSG%3A3857&BBOX=728903.50162598,6980840.9182568,733795.47143555,6985732.8880664&WIDTH=256&HEIGHT=256

I tried looking for the tiles on my Ubunto server. I was expected a directory structure with a lot of subdirs with numbers (zoomlevels, X and Y) and eventually the png files.
But I can't find it. I must say I'm still a novice with Ubuntu so I might not be searching correctly or the tiles are not saved to disk.

Can anybody point me in the correct direction about solving this performance issue?

Thanks,

Paul

--
Organizing the International Open Source GIS conference 2012 in The Netherlands:
http://www.mapwindow.org/conference/2012/

------------------------------------------------------------------------------
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Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
Geoserver-users mailing list
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threat landscape has changed and how IT managers can respond. Discussions
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Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
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[Imran Rajjad]

here is the problem, you are not using cached layer, neither you are hitting gwc.

"Assen: Zonnepanelen", "http://myISP/geoserver/MyApp/wms",

if you have cached the layer, go to the demo page of gwc ,you should be able to see the cached layers through openlayers, check the source of that page to see how to use a gwc layer in openlayers. your url should look something like  http://myISP/geoserver/gwc/service/wms/..... (hope I got that right)

for more check this page

http://docs.geoserver.org/stable/en/user/geowebcache/demopage.html

regards,

Imran

On Mon, May 7, 2012 at 6:54 PM, Paul Meems <[hidden email]> wrote:

Thanks Imran,

I'm using Tomcat and I've attached part of my source code.

Thanks,

Paul
--
Organizing the International Open Source GIS conference 2012 in The Netherlands:
http://www.mapwindow.org/conference/2012/

2012/5/7 Imran Rajjad <[hidden email]>

the tiles are in your datadir/gwc .. you can verify it. can you show the openlayers source, which you are using to access the cached layer? secondly what container are you using?

regards,

Imran

On Mon, May 7, 2012 at 6:40 PM, Paul Meems <[hidden email]> wrote:

Thanks Imran,

After writing my mail to this list I've continued trying and found that if I don't use palette: 'safe' in OpenLayers the speed is as expected: fast.
The size of the tiles grow a bit (20%) but the overall speed improvement is huge.

I don't have a specific reason the use the palette option, I just came across it while learning OL.

I still want to know where the tiles go to on the server, just to understand it better.

Thanks,

Paul
--
Organizing the International Open Source GIS conference 2012 in The Netherlands:
http://www.mapwindow.org/conference/2012/

2012/5/7 Imran Rajjad <[hidden email]>

can you please post your openlayers code for that cached layer? and what j2ee container are you using?

regards,

Imran

On Mon, May 7, 2012 at 5:05 PM, Paul Meems <[hidden email]> wrote:

Hi,

I'm new to this list. I'm Paul I'm from The Netherlands and I'm in the process of making a simple WebGIS with just viewing capabilities.
I have a cloud server running Ubunto. GeoServer v2.1.3 and PostGreSQL v9.1 with PostGIS.

All is running well except for the performance. It takes very long to show my WMS data in OpenLayers.
I have enabled GeoWebCache and am using tiled: true, format: 'image/png8' and palette: 'safe'.

I have pre-seeded my layer and I see on the Cached Layers page of the GeoServer admin that it is using 44MB.
So far so good, but somehow I'm not certain my OpenLayers application is using these tiles. Also because I would suspect that even if I didn't seeded correctly the tiles would be generated on the fly.
And thus following visits to my page would be faster. But my initial start at zoom level 12 and I need 46 tiles, this takes between 2.5 and 3 minutes to load.
Much to slow!
The tile sizes are from 35kB - 290b.
This is the request I make;
http://myIP/geoserver/myApp/wms?LAYERS=myLayername&FORMAT=image%2Fpng8&TRANSPARENT=TRUE&PALETTE=safe&TILED=true&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&SRS=EPSG%3A3857&BBOX=728903.50162598,6980840.9182568,733795.47143555,6985732.8880664&WIDTH=256&HEIGHT=256

I tried looking for the tiles on my Ubunto server. I was expected a directory structure with a lot of subdirs with numbers (zoomlevels, X and Y) and eventually the png files.
But I can't find it. I must say I'm still a novice with Ubuntu so I might not be searching correctly or the tiles are not saved to disk.

Can anybody point me in the correct direction about solving this performance issue?

Thanks,

Paul

--
Organizing the International Open Source GIS conference 2012 in The Netherlands:
http://www.mapwindow.org/conference/2012/

------------------------------------------------------------------------------
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Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
Geoserver-users mailing list
[hidden email]
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Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
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------------------------------------------------------------------------------
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Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
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[hidden email]
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Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
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[Paul Meems]

Imran,

I will have a look, but I've always understood using tiled=true would fix this for me.

Thanks,

Paul

Paul Meems 
Release manager, configuration manager
and forum moderator of MapWindow GIS.
www.mapwindow.org

Owner of MapWindow.nl - Support for
Dutch speaking users.
www.mapwindow.nl

2012/5/7 Imran Rajjad <[hidden email]>

here is the problem, you are not using cached layer, neither you are hitting gwc.

"Assen: Zonnepanelen", "http://myISP/geoserver/MyApp/wms",

if you have cached the layer, go to the demo page of gwc ,you should be able to see the cached layers through openlayers, check the source of that page to see how to use a gwc layer in openlayers. your url should look something like  http://myISP/geoserver/gwc/service/wms/..... (hope I got that right)

for more check this page

http://docs.geoserver.org/stable/en/user/geowebcache/demopage.html

regards,

Imran

On Mon, May 7, 2012 at 6:54 PM, Paul Meems <[hidden email]> wrote:

Thanks Imran,

I'm using Tomcat and I've attached part of my source code.

Thanks,

Paul
--
Organizing the International Open Source GIS conference 2012 in The Netherlands:
http://www.mapwindow.org/conference/2012/

2012/5/7 Imran Rajjad <[hidden email]>

the tiles are in your datadir/gwc .. you can verify it. can you show the openlayers source, which you are using to access the cached layer? secondly what container are you using?

regards,

Imran

On Mon, May 7, 2012 at 6:40 PM, Paul Meems <[hidden email]> wrote:

Thanks Imran,

After writing my mail to this list I've continued trying and found that if I don't use palette: 'safe' in OpenLayers the speed is as expected: fast.
The size of the tiles grow a bit (20%) but the overall speed improvement is huge.

I don't have a specific reason the use the palette option, I just came across it while learning OL.

I still want to know where the tiles go to on the server, just to understand it better.

Thanks,

Paul
--
Organizing the International Open Source GIS conference 2012 in The Netherlands:
http://www.mapwindow.org/conference/2012/

2012/5/7 Imran Rajjad <[hidden email]>

can you please post your openlayers code for that cached layer? and what j2ee container are you using?

regards,

Imran

On Mon, May 7, 2012 at 5:05 PM, Paul Meems <[hidden email]> wrote:

Hi,

I'm new to this list. I'm Paul I'm from The Netherlands and I'm in the process of making a simple WebGIS with just viewing capabilities.
I have a cloud server running Ubunto. GeoServer v2.1.3 and PostGreSQL v9.1 with PostGIS.

All is running well except for the performance. It takes very long to show my WMS data in OpenLayers.
I have enabled GeoWebCache and am using tiled: true, format: 'image/png8' and palette: 'safe'.

I have pre-seeded my layer and I see on the Cached Layers page of the GeoServer admin that it is using 44MB.
So far so good, but somehow I'm not certain my OpenLayers application is using these tiles. Also because I would suspect that even if I didn't seeded correctly the tiles would be generated on the fly.
And thus following visits to my page would be faster. But my initial start at zoom level 12 and I need 46 tiles, this takes between 2.5 and 3 minutes to load.
Much to slow!
The tile sizes are from 35kB - 290b.
This is the request I make;
http://myIP/geoserver/myApp/wms?LAYERS=myLayername&FORMAT=image%2Fpng8&TRANSPARENT=TRUE&PALETTE=safe&TILED=true&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&SRS=EPSG%3A3857&BBOX=728903.50162598,6980840.9182568,733795.47143555,6985732.8880664&WIDTH=256&HEIGHT=256

I tried looking for the tiles on my Ubunto server. I was expected a directory structure with a lot of subdirs with numbers (zoomlevels, X and Y) and eventually the png files.
But I can't find it. I must say I'm still a novice with Ubuntu so I might not be searching correctly or the tiles are not saved to disk.

Can anybody point me in the correct direction about solving this performance issue?

Thanks,

Paul

--
Organizing the International Open Source GIS conference 2012 in The Netherlands:
http://www.mapwindow.org/conference/2012/

------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and
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[geowolf]

On Mon, May 7, 2012 at 3:40 PM, Paul Meems <[hidden email]> wrote:

Thanks Imran,

After writing my mail to this list I've continued trying and found that if I don't use palette: 'safe' in OpenLayers the speed is as expected: fast.
The size of the tiles grow a bit (20%) but the overall speed improvement is huge.

I don't have a specific reason the use the palette option, I just came across it while learning OL.

I still want to know where the tiles go to on the server, just to understand it better.

The requests you are making are WMS GetMap, if you want to make sure the tiles are cached

you should make requests to the embedded GWC directly, and make sure the requests

do line up with an official GWC grid (if you use the GWC preview as a template they will).

Cheers

Andrea

--
Ing. Andrea Aime
GeoSolutions S.A.S.
Tech lead

Via Poggio alle Viti 1187
55054  Massarosa (LU)
Italy

phone: [phone]
fax:      [phone]
mob:    [phone]

http://www.geo-solutions.it
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[cholmes]

It should, though you have to be sure you've also enabled direct WMS integration in GeoWebCache, or it'll just a small in memory tile thing in geoserver. I think in 2.1.3 there's an option to turn it on in the geoserver admin.

On Mon, May 7, 2012 at 10:23 AM, Paul Meems <[hidden email]> wrote:

Imran,

I will have a look, but I've always understood using tiled=true would fix this for me.

Thanks,

Paul

Paul Meems 
Release manager, configuration manager
and forum moderator of MapWindow GIS.
www.mapwindow.org

Owner of MapWindow.nl - Support for
Dutch speaking users.
www.mapwindow.nl

2012/5/7 Imran Rajjad <[hidden email]>

here is the problem, you are not using cached layer, neither you are hitting gwc.

"Assen: Zonnepanelen", "http://myISP/geoserver/MyApp/wms",

if you have cached the layer, go to the demo page of gwc ,you should be able to see the cached layers through openlayers, check the source of that page to see how to use a gwc layer in openlayers. your url should look something like  http://myISP/geoserver/gwc/service/wms/..... (hope I got that right)

for more check this page

http://docs.geoserver.org/stable/en/user/geowebcache/demopage.html

regards,

Imran

On Mon, May 7, 2012 at 6:54 PM, Paul Meems <[hidden email]> wrote:

Thanks Imran,

I'm using Tomcat and I've attached part of my source code.

Thanks,

Paul
--
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2012/5/7 Imran Rajjad <[hidden email]>

the tiles are in your datadir/gwc .. you can verify it. can you show the openlayers source, which you are using to access the cached layer? secondly what container are you using?

regards,

Imran

On Mon, May 7, 2012 at 6:40 PM, Paul Meems <[hidden email]> wrote:

Thanks Imran,

After writing my mail to this list I've continued trying and found that if I don't use palette: 'safe' in OpenLayers the speed is as expected: fast.
The size of the tiles grow a bit (20%) but the overall speed improvement is huge.

I don't have a specific reason the use the palette option, I just came across it while learning OL.

I still want to know where the tiles go to on the server, just to understand it better.

Thanks,

Paul
--
Organizing the International Open Source GIS conference 2012 in The Netherlands:
http://www.mapwindow.org/conference/2012/

2012/5/7 Imran Rajjad <[hidden email]>

can you please post your openlayers code for that cached layer? and what j2ee container are you using?

regards,

Imran

On Mon, May 7, 2012 at 5:05 PM, Paul Meems <[hidden email]> wrote:

Hi,

I'm new to this list. I'm Paul I'm from The Netherlands and I'm in the process of making a simple WebGIS with just viewing capabilities.
I have a cloud server running Ubunto. GeoServer v2.1.3 and PostGreSQL v9.1 with PostGIS.

All is running well except for the performance. It takes very long to show my WMS data in OpenLayers.
I have enabled GeoWebCache and am using tiled: true, format: 'image/png8' and palette: 'safe'.

I have pre-seeded my layer and I see on the Cached Layers page of the GeoServer admin that it is using 44MB.
So far so good, but somehow I'm not certain my OpenLayers application is using these tiles. Also because I would suspect that even if I didn't seeded correctly the tiles would be generated on the fly.
And thus following visits to my page would be faster. But my initial start at zoom level 12 and I need 46 tiles, this takes between 2.5 and 3 minutes to load.
Much to slow!
The tile sizes are from 35kB - 290b.
This is the request I make;
http://myIP/geoserver/myApp/wms?LAYERS=myLayername&FORMAT=image%2Fpng8&TRANSPARENT=TRUE&PALETTE=safe&TILED=true&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&SRS=EPSG%3A3857&BBOX=728903.50162598,6980840.9182568,733795.47143555,6985732.8880664&WIDTH=256&HEIGHT=256

I tried looking for the tiles on my Ubunto server. I was expected a directory structure with a lot of subdirs with numbers (zoomlevels, X and Y) and eventually the png files.
But I can't find it. I must say I'm still a novice with Ubuntu so I might not be searching correctly or the tiles are not saved to disk.

Can anybody point me in the correct direction about solving this performance issue?

Thanks,

Paul

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[geowolf]

On Mon, May 7, 2012 at 5:30 PM, Chris Holmes <[hidden email]> wrote:

It should, though you have to be sure you've also enabled direct WMS integration in GeoWebCache, or it'll just a small in memory tile thing in geoserver. I think in 2.1.3 there's an option to turn it on in the geoserver admin.

Direct GWC integration + tile requests matching an official GWC grid, otherwise you end up

on the standard WMS path.

Better, imho, to hit directly GWC, if a request is not cacheable because outside of the 

pre-defined grid you at least get back an error message

Chrees

Andrea

 

--
Ing. Andrea Aime
GeoSolutions S.A.S.
Tech lead

Via Poggio alle Viti 1187
55054  Massarosa (LU)
Italy

phone: [phone]
fax:      [phone]
mob:    [phone]

http://www.geo-solutions.it
http://geo-solutions.blogspot.com/
http://www.youtube.com/user/GeoSolutionsIT
http://www.linkedin.com/in/andreaaime
http://twitter.com/geowolf


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[cholmes]

On Mon, May 7, 2012 at 3:42 PM, Andrea Aime
<[hidden email]> wrote:

> On Mon, May 7, 2012 at 5:30 PM, Chris Holmes <[hidden email]> wrote:
>>
>> It should, though you have to be sure you've also enabled direct WMS
>> integration in GeoWebCache, or it'll just a small in memory tile thing in
>> geoserver. I think in 2.1.3 there's an option to turn it on in the geoserver
>> admin.
>
>
> Direct GWC integration + tile requests matching an official GWC grid,
> otherwise you end up
> on the standard WMS path.
> Better, imho, to hit directly GWC, if a request is not cacheable because
> outside of the
> pre-defined grid you at least get back an error message
>

+1. _especially_ when testing.

> Chrees
> Andrea
>
> --
> Ing. Andrea Aime
> GeoSolutions S.A.S.
> Tech lead
>
> Via Poggio alle Viti 1187
> 55054  Massarosa (LU)
> Italy
>
> phone: [phone]
> fax:      [phone]
> mob:    [phone]
>
> http://www.geo-solutions.it
> http://geo-solutions.blogspot.com/
> http://www.youtube.com/user/GeoSolutionsIT
> http://www.linkedin.com/in/andreaaime
> http://twitter.com/geowolf
>

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[Gabriel Roldan]

On Mon, May 7, 2012 at 1:04 PM, Chris Holmes <[hidden email]> wrote:

> On Mon, May 7, 2012 at 3:42 PM, Andrea Aime
> <[hidden email]> wrote:
>> On Mon, May 7, 2012 at 5:30 PM, Chris Holmes <[hidden email]> wrote:
>>>
>>> It should, though you have to be sure you've also enabled direct WMS
>>> integration in GeoWebCache, or it'll just a small in memory tile thing in
>>> geoserver. I think in 2.1.3 there's an option to turn it on in the geoserver
>>> admin.
>>
>>
>> Direct GWC integration + tile requests matching an official GWC grid,
>> otherwise you end up
>> on the standard WMS path.
>> Better, imho, to hit directly GWC, if a request is not cacheable because
>> outside of the
>> pre-defined grid you at least get back an error message
>>
>
> +1. _especially_ when testing.
>

If, by the other hand, you do want to use direct WMS integration, when
testing you can check the HTTP response header named
geowebcache-tile-index.
If present, the request was served by gwc, otherwise by the regular WMS.

Cheers,
Gabriel

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