Some additional questions.

You wrote about tiles, so you are talking about raster/image data ?

Where are your tiles stored. On a shared drive or in a database ?

if you use a database, which one ?

Are your tiles multiband images or images with a color table. If you  
are unsure, send me the output of
gdalinfo yourtile.png.   I achieved a performance boost when switching  
from multiband images to images with a color table.

Cheers
Christian




Quoting DGIS Devels <[email protected]>:

> Hi, we have a question about Geoserver performance.
>
> We have been trying for a couple of months to find a good configuration that
> offers a solution to our use case. You can see our current architecture in
> the attachment:
> - WebLogic cluster with 2 machines and 4 managed servers (2 per machine). We
> have tested it whit JRockit and Sun JVM.
> - 4 Geoservers (one per managed server)
> - 2 GeoWebCaches (one per machine)
> - A software balancer which balances requests between GeoWebCaches and
> Geoservers
>
> We've testing too with a lot of values c for parameters like memory, render
> memory, timeouts, DB connections ...
>
> Our goal is to support 85 concurrent users performing an average of 5 map
>  requests  (near of 100 256x256 tiles) in a time of 10 minutes. It must be
> equivalent, according to our calculations, to respond to some 85000 requests
> in those 10 minutes.
>
> So far, the max number of request we've been able to response is about 30000
> tiles. In most cases, some GeoServers or GeoWebCaches instances crashes.
>
> Anybody has made similar tests? Do you think is possible to reach a similar
> performance?
>



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