[redland-dev] What is the expected performance of a sparql Query?

Kieron Taylor krt1 at soton.ac.uk
Wed Aug 20 21:34:39 BST 2008


I have queried small triplestores with SPARQL and experienced near 
instantaneous responses. 20,000 should be trivial for in-memory queries. 
I suspect you're doing something slow in your query, rather than there 
being something odd in your data model.

Would you like to post the query?

Kieron


Lou Sakey wrote:
> I have Redland model with 20,000 triples using the Berkeley DB
> storage option.   I am performing a sparql query using
> librdf_new_query() and librdf_query_execute() to search for all
> people that are male and born between two dates.
> 
> There are a total of 500 people in the model.   Each person has a sex
> property and a birthday property (among others).  It took over 8
> minutes for librdf_query_execute() to complete on a dual core 2.16
> GHZ processor with 2 gigabytes of memory.
> 
> Is this the expected behavior?
> 
> Thanks in advance
> 
> Lou
> 
> 





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