On Fri, Aug 7, 2015 at 10:28 AM, Kirk, Victor <[email protected]> wrote:
> Hi, > > We have a polygon layer used as a backdrop for a WMS based layer group. > The layer contains the outlines of the UK, one of which is the mainland and > is obviously quite large. I have generalised versions of the geometries to > use when zoomed out, however when zoomed in, encoding the whole mainland > for every tile introduces a bottleneck and requests quickly build up and > time out as every request. The layer group contains around 20 different > layers, without the polygon layer the group renders very quickly add the > layer back in and it becomes very unsresposive. > > The layer is used to provide the coast and a background colour for land. > I'm looking at "chopping" up the polygons on a grid to create smaller > geometries that can be used to provide the background colour and extract > the coast into a number of smaller lines. > Yes, this is the standard trick to handle large polygons. > > But before I do this I was wondering if there was some way I could get > geoserver to cache the features for this layer in memory rather than having > to hit the database for every request. > No, there is no facility to keep features in memory, we do no data caching whatsoever. Full layer caching would be relatively easy to implement though, partial/usage sensitive one would be harder (only keep in memory the hot areas), both would require either dedicated resources to work it, or funding to one of the commercial support providers towards implementing that specific feature. Cheers Andrea -- == GeoServer Professional Services from the experts! Visit http://goo.gl/it488V for more information. == Ing. Andrea Aime @geowolf Technical Lead GeoSolutions S.A.S. Via Poggio alle Viti 1187 55054 Massarosa (LU) Italy phone: +39 0584 962313 fax: +39 0584 1660272 mob: +39 339 8844549 http://www.geo-solutions.it http://twitter.com/geosolutions_it *AVVERTENZE AI SENSI DEL D.Lgs. 196/2003* Le informazioni contenute in questo messaggio di posta elettronica e/o nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il loro utilizzo è consentito esclusivamente al destinatario del messaggio, per le finalità indicate nel messaggio stesso. Qualora riceviate questo messaggio senza esserne il destinatario, Vi preghiamo cortesemente di darcene notizia via e-mail e di procedere alla distruzione del messaggio stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso, divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalità diverse, costituisce comportamento contrario ai principi dettati dal D.Lgs. 196/2003. The information in this message and/or attachments, is intended solely for the attention and use of the named addressee(s) and may be confidential or proprietary in nature or covered by the provisions of privacy act (Legislative Decree June, 30 2003, no.196 - Italy's New Data Protection Code).Any use not in accord with its purpose, any disclosure, reproduction, copying, distribution, or either dissemination, either whole or partial, is strictly forbidden except previous formal approval of the named addressee(s). If you are not the intended recipient, please contact immediately the sender by telephone, fax or e-mail and delete the information in this message that has been received in error. The sender does not give any warranty or accept liability as the content, accuracy or completeness of sent messages and accepts no responsibility for changes made after they were sent or for other risks which arise as a result of e-mail transmission, viruses, etc. -------------------------------------------------------
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