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Posted to dev@jena.apache.org by Andy Seaborne <an...@apache.org> on 2017/04/05 12:23:47 UTC

Memory [was: Re: Long time to load the reasoner ...]

 > I would allow 1k per
 > triple (depending on literal sizes)

Since adding the intern cache to parsing, the memory footprint has dropped.

We use 500 bytes/triple and that has a generous over-estimate for 
temporary processing space that is over and above storage.

Some measuring of storage requirement [1] (not inferencing):

RxNORM:              180 bytes/triple.
SNOMED CT:           212
chembl_21.0_unichem: 280

Obviously many long literals will throw that rough estimate.

	Andy

[1] Measured with:

https://github.com/afs/jena-workspace/blob/master/src/main/java/tools/RunMemTimeSpace.java

See FactoryRDFCaching