[Virtuoso-users] Pay-As-You-Go Virtuoso AMIs in Amazon Cloud
Hello, Everyone -- We are in the process of releasing some new Pay-As-You-Go (PAGO) editions of Virtuoso on the Amazon EC2 Cloud, which we thought would be of interest here. These instances are EBS-backed AMIs, providing the following benefits: * Virtuoso DBMS Server is preinstalled with basic tuning for the host operating system. * You can stop and restart the AMI without terminating it -- so changes and current runtime state persist. * With the hourly model, you pay only for the time the AMI is used. * With the DBpedia AMI (coming very soon), you will immediately have your own copy of DBpedia available, without having to load-your-own. For details, you can check out the simple get-up-and-go docs, here -- http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtPayAsYouGoEBSBackedAMI Please enjoy! Ted -- A: Yes. http://www.idallen.com/topposting.html | Q: Are you sure? | | A: Because it reverses the logical flow of conversation. | | | Q: Why is top posting frowned upon? Ted Thibodeau, Jr. // voice +1-781-273-0900 x32 Senior Support Evangelism //mailto:tthibod...@openlinksw.com // http://twitter.com/TallTed OpenLink Software, Inc. // http://www.openlinksw.com/ 10 Burlington Mall Road, Suite 265, Burlington MA 01803 Weblog -- http://www.openlinksw.com/blogs/ LinkedIn -- http://www.linkedin.com/company/openlink-software/ Twitter -- http://twitter.com/OpenLink Google+ -- http://plus.google.com/100570109519069333827/ Facebook -- http://www.facebook.com/OpenLinkSoftware Universal Data Access, Integration, and Management Technology Providers smime.p7s Description: S/MIME cryptographic signature -- ___ Virtuoso-users mailing list Virtuoso-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/virtuoso-users
[Virtuoso-users] DBpedia Usage Report, August 2015
Hello, again -- We've been running the public DBpedia service for several years, and have recently started publishing periodic reports of usage and other analysis, which we're aiming to refresh roughly quarterly going forward. The latest report, with usage data through July 31, 2015, is now available here -- http://bit.ly/1IL35Xu We look forward to your reactions! Ted -- A: Yes. http://www.idallen.com/topposting.html | Q: Are you sure? | | A: Because it reverses the logical flow of conversation. | | | Q: Why is top posting frowned upon? Ted Thibodeau, Jr. // voice +1-781-273-0900 x32 Senior Support Evangelism //mailto:tthibod...@openlinksw.com // http://twitter.com/TallTed OpenLink Software, Inc. // http://www.openlinksw.com/ 10 Burlington Mall Road, Suite 265, Burlington MA 01803 Weblog -- http://www.openlinksw.com/blogs/ LinkedIn -- http://www.linkedin.com/company/openlink-software/ Twitter -- http://twitter.com/OpenLink Google+ -- http://plus.google.com/100570109519069333827/ Facebook -- http://www.facebook.com/OpenLinkSoftware Universal Data Access, Integration, and Management Technology Providers smime.p7s Description: S/MIME cryptographic signature -- ___ Virtuoso-users mailing list Virtuoso-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/virtuoso-users
Re: [Virtuoso-users] Memory leaks with virtuoso 7.2.0
Hi Daniel, Valgrind is probably the most common method of tracking memory problems on Linux I am aware of. Please note the following document on monitoring Virtuoso memory consumption: http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtMonitorMemoryConsumption Also, note the following 2 parameters: ThreadCleanupInterval, ResourcesCleanupInterval which can both be set to 1 in order to reduce memory leaking: http://docs.openlinksw.com/virtuoso/databaseadmsrv.html#ex_threadcleanupinterval although as this was not apparently occurring with 7.2.0 it may not help, but worth trying ... How is this process to convert MeSH XML to MeSH RDF which uses lots of memory performed, is this done in Virtuoso or by some external process ? Best Regards Hugh Williams Professional Services OpenLink Software, Inc. // http://www.openlinksw.com/ Weblog -- http://www.openlinksw.com/blogs/ LinkedIn -- http://www.linkedin.com/company/openlink-software/ Twitter -- http://twitter.com/OpenLink Google+ -- http://plus.google.com/100570109519069333827/ Facebook -- http://www.facebook.com/OpenLinkSoftware Universal Data Access, Integration, and Management Technology Providers On 6 Aug 2015, at 15:28, Davis, Daniel (NIH/NLM) [C] daniel.da...@nih.gov wrote: MeSH RDF in production (front-end is http://id.nlm.nih.gov/) is experiencing Virtuoso memory leaks of virtuoso during our nightly reload of all the MeSH triples.We noticed these first because virtuoso was being killed by the OOM killer, either when the process to convert MeSH XML to MeSH RDF used lots of memory, or when the scripted load of the mesh triples via DB.DBA.ttlp() started. We are upgrading from Virtuoso 7.2.0 to 7.2.1. Aside from compiling it debug and running this under valgrind, are there any other ways to diagnose memory problems with Virtuoso? Dan Davis, Systems/Applications Architect (Contractor), Office of Computer and Communications Systems, National Library of Medicine, NIH -- ___ Virtuoso-users mailing list Virtuoso-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/virtuoso-users -- ___ Virtuoso-users mailing list Virtuoso-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/virtuoso-users
Re: [Virtuoso-users] Memory leaks with virtuoso 7.2.0
Hugh Williams wrote: How is this process to convert MeSH XML to MeSH RDF which uses lots of memory performed, is this done in Virtuoso or by some external process ? It's really converting to triples - https://github.com/HHS/meshrdf contains the conversion code, which is basically an XSLT process run by saxon9he in java. There is no Java code in our converter.One reason we use the current method is so that researchers and linked data software professionals can independently do the conversion. Could this XSLT code run inside of Virtuoso? How would we do a partial change every night rather than a full reload given that some IRIs that function as both subjects and objects may be deleted each night? Thanks, Dan Davis, Systems/Applications Architect (Contractor), Office of Computer and Communications Systems, National Library of Medicine, NIH -- ___ Virtuoso-users mailing list Virtuoso-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/virtuoso-users
