Re: [Virtuoso-users] RAM requirements

2013-06-27 Thread Hugh Williams
Hi Alexey, We need to see the status(''); output either for the v6 or v7 instance being used. Also, where did you see these "rollback" messages ? Using the Bulk loader the load_list table shows the status of the load of datasets and any errors reported loading them to you see any ? The ld_

Re: [Virtuoso-users] RAM requirements

2013-06-27 Thread Alexey Zakhlestin
On 28.06.2013, at 0:39, Hugh Williams wrote: > Hi Alexey, > > For Virtuoso 6 the average size of a triple is about 31bytes, with the > default index schema as detailed in the followng FAQ document: > > > http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VOSVirtuoso6FAQ#What%20

Re: [Virtuoso-users] RAM requirements

2013-06-27 Thread Hugh Williams
Hi Alexey, For Virtuoso 6 the average size of a triple is about 31bytes, with the default index schema as detailed in the followng FAQ document: http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VOSVirtuoso6FAQ#What%20is%20the%20storage%20cost%20per%20triple? What method are y

Re: [Virtuoso-users] Performance problems with Jena provider graph loading

2013-06-27 Thread Hugh Williams
Hi Pekka, The fastest method of loading large datasets into Virtuoso is using the RDF Bulk loader as detailed at: http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtBulkRDFLoader Having said that the getBulkUpdateHandler() should improve performance over single inserts, bu

[Virtuoso-users] Trouble combining OneOrMorePath property path with another graph pattern.

2013-06-27 Thread Todd DeLuca
I'm trying to combine two graph patterns that each work individually into a single graph pattern. However the combined pattern does not have a solution, even though it should have a solution. To show what I am doing, below are several queries which ask: Is there a solution to X? Is there a solut

[Virtuoso-users] RAM requirements

2013-06-27 Thread Alexey Zakhlestin
Is there some approximate table on reasonable RAM-requirements depending on number of triples? I see that import of data has almost stopped after 30M triples on server with 2Gb of RAM running latest Virtuoso/6. (NumberOfBuffers and MaxDirtyBuffers are set per http://virtuoso.openlinksw.com/dataspa

[Virtuoso-users] Performance problems with Jena provider graph loading

2013-06-27 Thread Pekka Aarnio
Hello I have coded a java program for mapping and loading relational data over network into Virtuoso (open source edition) as rdf/owl graphs. This program uses first d2rq-tool api for relational-to-rdf mapping and then loads the generated list of triples into Virtuoso using Virtuoso Jena provide