Sounds like you may be trying to rendering just too much in one request. 20
layers is quite a bit and requires a good chunk of memory depending on the
styling for the layers, etc...
My guess it that you are making this request a few times in parallel and the
memory that geoserver has to allocate is just too much. That or perhaps some
of the layers/styles are poorly configured and it is taking too long to
render individual layers.
Regardless I would checkout the wms limits [1] feature which allows you to
set limits on wms requests to avoid a client overwhelming the server and
grinding it to a halt. Which sounds like exactly what is happening here.
Also applicable is the control flow extension [2] that allows you to control
how many requests of a particular service/operation are handled in parallel.
So that if you do need to do big rendering jobs you can constrain requests
so that only a handful are done in parallel.
Hope that helps.
-Justin
[1]
http://docs.geoserver.org/stable/en/user/services/wms/configuration.html#request-limits
[2]
http://docs.geoserver.org/stable/en/user/community/controlflow/index.html
On Sat, Dec 4, 2010 at 6:00 AM, Astro :) <[email protected]> wrote:
> Dear Geoserver user,
>
> Not sure this is right channel? May i sorry if it is not.
> Here is my troubleshooting on Geoserver+Tomcat. I have install Tomcat 6 and
> Geoserver 2.02 on single server and call data form Oracle Spatial form
> another server. I have followed tune Geoserver and JVM as shown in geoserver
> user manual. It is go very well at first time, but when i send many many
> request such as 20 layers in same time from my web application to geoserver.
> The result is Geoserver take long time to responded my request and then
> finally Apache/Tomcat has shut down by itself.
>
> I have try to change java servlet to Sun Glassflish but it was terminate as
> same as Tomcat when send many request.
>
> Did you ever have trouble as me? Please guide/hints me to manage this
> problem.
>
>
> Thanks in advance,
>
> Prasong.P
>
>
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>
--
Justin Deoliveira
OpenGeo - http://opengeo.org
Enterprise support for open source geospatial.
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