Out of memory while using InstantDB

Hi,
I'm developing a java based application and using InstantDB database.
I want to support large database. But while using the InstantDB i'm getting the Out of Memory error even after around 13000 records.
What properties and their values i should set so that this problem doesnot arise.
In my properties file i'm currently setting the following properties :
indexPath=./indexes
systemPath=./system
tablePath=./tables
tmpPath=./tmp
relativeToProperties=1
resultsOnDisk=1
garbageCollectStatements=100
cacheAmount=10
cacheCondition=CACHE_PERCENT
systemCacheSize=10
fastUpdate = 1

Are these correct or not, what should i set.
Please guide me to use the correct properties.

Thanks.
Smita

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