can you please be a bit more specific about the configuration you have currently installed? e.g. version of Jena, back end type (TDB, SDB, in-memory), current hardware, and OS (32bit, 64bit, linux, windows,mac), and type of reasoner you use.
--- Marco Neumann KONA Join us at SemTech Biz in San Francisco June 3-7 2012 and save 15% with the lotico community discount code 'STMN' http://www.lotico.com/evt/SemTechSF2012/ On Fri, Mar 30, 2012 at 4:22 AM, [email protected] <[email protected]> wrote: > Dear users, > > I am new to Jena and have a problem with Jena OWL-API. I have written some > simple Java code that: > > 1) extracts some tuples (around 1 million tuples) of data from a database > 2) puts each of them in an ontology file using Jena library. In particular, it > takes every tuple and inserts > every element in a class of the ontology file, by using methods like > createIndividual, addproperty, model.write. > > The insertion phase is very quick when my program starts, but the performances > became worse and worse as > time goes by. The DB man has told me that the database has no problems. I have > run the program with 5 gigabytes > of RAM...it simply ends up to use them all. Is that normal? Do I have to use a > more powerful PC to manage such > data? I can give you more details about my problem if you tell me what I have > to look for exactly. > > Thanks a lot, > > Paola
