Hey guys,
I'm working on a geo spatial application using Qi4j to model the domain specific
parts. I ran into trouble with the performance and memory consumption.
It takes ~30s to load 10.000 entities (consisting of ~100k ValueComposites of
different types). After loading all this eats up ~100MB of RAM. This is to slow
and to much.
10K entities are not much for a GIS application. Given the current memory
foodprint (and 1GB Java heap) not even 10 users can work with the application
concurrently.
Usually a GIS application works in a pipelined mode when rendering features
(entities). Memory is never a problem with that architecture. Unfortunatelly
Qi4j holds all entities of an UoW in memory. We discussed this earlier on this
list. So I added a cache SPI to UnitOfWorkInstance. This works but it does not
actually cure the problem of memory consumption because of the time needed to
re-instantiate the entities.
Any ideas on this would be greatly appreciated.
-Falko
--
Falko Bräutigam
http://polymap.org/polymap3
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