Hi Roland, Did you try changing the ThreadsPerQuery setting in your virtuoso.ini file to the number of cpu's in your machine?
That seems to help in my case. Although some queries remain IO bound on my desktop machine and I don't always get 100% cpu usage. Regards, Jerven On 19/02/14 17:46, Roland Cornelissen wrote: > Hi, > > I have a question about the usage of CPU cores when querying a large > graph: Is it possible to assign _all_ available cores to a SPARQL query? > I noticed that when loading a large dataset all available cores in CPU > are used. > When a SPARQL query is issued on this dataset not all but only 1 core is > used by VOS7. > Since this is a working database for only me I would like to have all > cores working on my query. > Is this possible? > > Thanks, > Roland > > > > > ------------------------------------------------------------------------------ > Managing the Performance of Cloud-Based Applications > Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. > Read the Whitepaper. > http://pubads.g.doubleclick.net/gampad/clk?id=121054471&iu=/4140/ostg.clktrk > > > > _______________________________________________ > Virtuoso-users mailing list > Virtuoso-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/virtuoso-users > -- ------------------------------------------------------------------- Jerven Bolleman jerven.bolle...@isb-sib.ch SIB Swiss Institute of Bioinformatics Tel: +41 (0)22 379 58 85 CMU, rue Michel Servet 1 Fax: +41 (0)22 379 58 58 1211 Geneve 4, Switzerland www.isb-sib.ch - www.uniprot.org Follow us at https://twitter.com/#!/uniprot ------------------------------------------------------------------- ------------------------------------------------------------------------------ Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121054471&iu=/4140/ostg.clktrk _______________________________________________ Virtuoso-users mailing list Virtuoso-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/virtuoso-users
