Re: Very slow SPARQL query on TDB
Hi Andy, I've good response time now with the SPARQL request fixed by Milorad. Nevertheless, I will focus on the TDB Optimizer soon and also upgrade Jena to the last release (my current release is 2.10.1) Thank you for your help. Sincerely, Laurent. On Wed, Jan 28, 2015 at 7:44 PM, Andy Seaborne a...@apache.org wrote: On 28/01/15 18:34, Milorad Tosic wrote: Hi Laurent, I would give a try to a different sequencing in the query. For example: PREFIX base:http://www.telemis.com/PREFIX rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#PREFIX XMLS: http://www.w3.org/2001/XMLSchema# SELECT ?x{ ?image base:sopInstanceUID 1.2.840.113564.10656621. 201302121438403281.1003000225002^^XMLS:string . ?image a base:Image . ?seq ?p ?image . ?x base:images ?seq . ?x a base:ImageAnnotation ; base:deleted false . } Though, it may or may not help. Regards,Milorad From: Laurent Rucquoy laurent.rucq...@telemis.com To: users@jena.apache.org Sent: Wednesday, January 28, 2015 6:13 PM Subject: Very slow SPARQL query on TDB Hello, I have a Java application which implements an object model persisted through JenaBean in my Jena TDB (see the attached image of the classes diagram). The request to retrieve an ImageAnnotation resource from the ID of a linked Image is very slow.Here is a typical SPARQL query used (more than 40s to get the result): PREFIX base:http://www.telemis.com/PREFIX rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#PREFIX XMLS: http://www.w3.org/2001/XMLSchema# SELECT ?x{ ?x a base:ImageAnnotation ; base:deleted false ; base:images ?seq . ?seq ?p ?image . ?image a base:Image . ?image base:sopInstanceUID 1.2.840.113564.10656621.201302121438403281.1003000225002^^XMLS:string .} Can you help me to find what I'm doing wrong ? Thank you in advance. Sincerely,Laurent Which version of TDB? 2.11.2 had possibly related fixes. https://issues.apache.org/jira/browse/JENA-685 If you do take Milorad suggestion, also put in a none.opt file to stop TDB reordering your improved order into a worse one. http://jena.apache.org/documentation/tdb/optimizer. html#choosing-the-optimizer-strategy Andy PS Attachments don't come through this list. -- *Laurent Rucquoy* RD Engineer Telemis http://www.telemis.com *Extending Human Life* *** NEW ADDRESS *** Avenue Athéna 2 1348 Louvain-la-Neuve Belgium laurent.rucq...@telemis.com Tel: +32 (0) 10 47 14 39 Fax: +32 (0) 10 48 00 20
Re: Very slow SPARQL query on TDB
Hi Milorad, Your suggestion solved my performance problem: the fixed SPARQL query took less than 1s to get the result ! Thank you very much for your efficient support. Sincerely, Laurent. On Wed, Jan 28, 2015 at 7:34 PM, Milorad Tosic mbto...@yahoo.com.invalid wrote: Hi Laurent, I would give a try to a different sequencing in the query. For example: PREFIX base:http://www.telemis.com/PREFIX rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#PREFIX XMLS: http://www.w3.org/2001/XMLSchema# SELECT ?x{ ?image base:sopInstanceUID 1.2.840.113564.10656621.201302121438403281.1003000225002^^XMLS:string . ?image a base:Image . ?seq ?p ?image . ?x base:images ?seq . ?x a base:ImageAnnotation ; base:deleted false . } Though, it may or may not help. Regards,Milorad From: Laurent Rucquoy laurent.rucq...@telemis.com To: users@jena.apache.org Sent: Wednesday, January 28, 2015 6:13 PM Subject: Very slow SPARQL query on TDB Hello, I have a Java application which implements an object model persisted through JenaBean in my Jena TDB (see the attached image of the classes diagram). The request to retrieve an ImageAnnotation resource from the ID of a linked Image is very slow.Here is a typical SPARQL query used (more than 40s to get the result): PREFIX base:http://www.telemis.com/PREFIX rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#PREFIX XMLS: http://www.w3.org/2001/XMLSchema# SELECT ?x{ ?x a base:ImageAnnotation ; base:deleted false ; base:images ?seq . ?seq ?p ?image . ?image a base:Image . ?image base:sopInstanceUID 1.2.840.113564.10656621.201302121438403281.1003000225002^^XMLS:string .} Can you help me to find what I'm doing wrong ? Thank you in advance. Sincerely,Laurent -- *Laurent Rucquoy* RD Engineer Telemis http://www.telemis.com *Extending Human Life* *** NEW ADDRESS *** Avenue Athéna 2 1348 Louvain-la-Neuve Belgium laurent.rucq...@telemis.com Tel: +32 (0) 10 47 14 39 Fax: +32 (0) 10 48 00 20
Re: Very slow SPARQL query on TDB
On 29/01/15 11:05, Laurent Rucquoy wrote: Hi Andy, I've good response time now with the SPARQL request fixed by Milorad. Nevertheless, I will focus on the TDB Optimizer soon and also upgrade Jena to the last release (my current release is 2.10.1) Thank you for your help. Glad you've got it working. 2.11.2+ should effectively do what Milorad suggests - it should pick image base:sopInstanceUID 1.2.840.113564.10656621.201302121438403281.1003000225002^^XMLS:string . as the first triple pattern to evaluate. The bug was that it would choose ?x a base:ImageAnnotation ; and that is somewhat less selective. Andy Sincerely, Laurent. On Wed, Jan 28, 2015 at 7:44 PM, Andy Seaborne a...@apache.org wrote: On 28/01/15 18:34, Milorad Tosic wrote: Hi Laurent, I would give a try to a different sequencing in the query. For example: PREFIX base:http://www.telemis.com/PREFIX rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#PREFIX XMLS: http://www.w3.org/2001/XMLSchema# SELECT ?x{ ?image base:sopInstanceUID 1.2.840.113564.10656621. 201302121438403281.1003000225002^^XMLS:string . ?image a base:Image . ?seq ?p ?image . ?x base:images ?seq . ?x a base:ImageAnnotation ; base:deleted false . } Though, it may or may not help. Regards,Milorad From: Laurent Rucquoy laurent.rucq...@telemis.com To: users@jena.apache.org Sent: Wednesday, January 28, 2015 6:13 PM Subject: Very slow SPARQL query on TDB Hello, I have a Java application which implements an object model persisted through JenaBean in my Jena TDB (see the attached image of the classes diagram). The request to retrieve an ImageAnnotation resource from the ID of a linked Image is very slow.Here is a typical SPARQL query used (more than 40s to get the result): PREFIX base:http://www.telemis.com/PREFIX rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#PREFIX XMLS: http://www.w3.org/2001/XMLSchema# SELECT ?x{ ?x a base:ImageAnnotation ; base:deleted false ; base:images ?seq . ?seq ?p ?image . ?image a base:Image . ?image base:sopInstanceUID 1.2.840.113564.10656621.201302121438403281.1003000225002^^XMLS:string .} Can you help me to find what I'm doing wrong ? Thank you in advance. Sincerely,Laurent Which version of TDB? 2.11.2 had possibly related fixes. https://issues.apache.org/jira/browse/JENA-685 If you do take Milorad suggestion, also put in a none.opt file to stop TDB reordering your improved order into a worse one. http://jena.apache.org/documentation/tdb/optimizer. html#choosing-the-optimizer-strategy Andy PS Attachments don't come through this list.
Very slow SPARQL query on TDB
Hello, I have a Java application which implements an object model persisted through JenaBean in my Jena TDB* (see the attached image of the classes diagram)*. The request to retrieve an ImageAnnotation resource from the ID of a linked Image is very slow. Here is a typical SPARQL query used (more than 40s to get the result): PREFIX base:http://www.telemis.com/ PREFIX rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns# PREFIX XMLS: http://www.w3.org/2001/XMLSchema# SELECT ?x { ?x a base:ImageAnnotation ; base:deleted false ; base:images ?seq . ?seq ?p ?image . ?image a base:Image . ?image base:sopInstanceUID 1.2.840.113564.10656621.201302121438403281.1003000225002^^XMLS:string . } Can you help me to find what I'm doing wrong ? Thank you in advance. Sincerely, Laurent
Re: Very slow SPARQL query on TDB
On 28/01/15 18:34, Milorad Tosic wrote: Hi Laurent, I would give a try to a different sequencing in the query. For example: PREFIX base:http://www.telemis.com/PREFIX rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#PREFIX XMLS: http://www.w3.org/2001/XMLSchema# SELECT ?x{ ?image base:sopInstanceUID 1.2.840.113564.10656621.201302121438403281.1003000225002^^XMLS:string . ?image a base:Image . ?seq ?p ?image . ?x base:images ?seq . ?x a base:ImageAnnotation ; base:deleted false . } Though, it may or may not help. Regards,Milorad From: Laurent Rucquoy laurent.rucq...@telemis.com To: users@jena.apache.org Sent: Wednesday, January 28, 2015 6:13 PM Subject: Very slow SPARQL query on TDB Hello, I have a Java application which implements an object model persisted through JenaBean in my Jena TDB (see the attached image of the classes diagram). The request to retrieve an ImageAnnotation resource from the ID of a linked Image is very slow.Here is a typical SPARQL query used (more than 40s to get the result): PREFIX base:http://www.telemis.com/PREFIX rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#PREFIX XMLS: http://www.w3.org/2001/XMLSchema# SELECT ?x{ ?x a base:ImageAnnotation ; base:deleted false ; base:images ?seq . ?seq ?p ?image . ?image a base:Image . ?image base:sopInstanceUID 1.2.840.113564.10656621.201302121438403281.1003000225002^^XMLS:string .} Can you help me to find what I'm doing wrong ? Thank you in advance. Sincerely,Laurent Which version of TDB? 2.11.2 had possibly related fixes. https://issues.apache.org/jira/browse/JENA-685 If you do take Milorad suggestion, also put in a none.opt file to stop TDB reordering your improved order into a worse one. http://jena.apache.org/documentation/tdb/optimizer.html#choosing-the-optimizer-strategy Andy PS Attachments don't come through this list.
Re: Very slow SPARQL query on TDB
Hi Laurent, I would give a try to a different sequencing in the query. For example: PREFIX base:http://www.telemis.com/PREFIX rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#PREFIX XMLS: http://www.w3.org/2001/XMLSchema# SELECT ?x{ ?image base:sopInstanceUID 1.2.840.113564.10656621.201302121438403281.1003000225002^^XMLS:string . ?image a base:Image . ?seq ?p ?image . ?x base:images ?seq . ?x a base:ImageAnnotation ; base:deleted false . } Though, it may or may not help. Regards,Milorad From: Laurent Rucquoy laurent.rucq...@telemis.com To: users@jena.apache.org Sent: Wednesday, January 28, 2015 6:13 PM Subject: Very slow SPARQL query on TDB Hello, I have a Java application which implements an object model persisted through JenaBean in my Jena TDB (see the attached image of the classes diagram). The request to retrieve an ImageAnnotation resource from the ID of a linked Image is very slow.Here is a typical SPARQL query used (more than 40s to get the result): PREFIX base:http://www.telemis.com/PREFIX rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#PREFIX XMLS: http://www.w3.org/2001/XMLSchema# SELECT ?x{ ?x a base:ImageAnnotation ; base:deleted false ; base:images ?seq . ?seq ?p ?image . ?image a base:Image . ?image base:sopInstanceUID 1.2.840.113564.10656621.201302121438403281.1003000225002^^XMLS:string .} Can you help me to find what I'm doing wrong ? Thank you in advance. Sincerely,Laurent