Hi Bart,
Virtuoso uses read committed isolation level by default, such that no read will
block waiting for a lock held by another client, see:
http://docs.openlinksw.com/virtuoso/virtuosofaq.html#virtuosofaq30
Locks can be monitored using the Virtuoso sys_l_stat view as detailed at:
http://docs.openlinksw.com/virtuoso/databaseadmsrv.html#perfdiaglocking
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 5 Jun 2014, at 14:52, Bart Vandewoestyne <bart.vandewoest...@telenet.be>
wrote:
> Hello list,
>
> A student of mine is doing a performance test with Virtuoso, and he
> asked me to pose the following question to this mailing list:
>
> "How are row and page level locks handled when querying the triplestore
> (only read stuff with SPARQL, no data inserts or SPARUL)? Is it
> possible to get a detailed listing of current locks?"
>
> Anything that can shed a light on this highly appreciated.
>
> Regards,
> Bart
>
> ------------------------------------------------------------------------------
> Learn Graph Databases - Download FREE O'Reilly Book
> "Graph Databases" is the definitive new guide to graph databases and their
> applications. Written by three acclaimed leaders in the field,
> this first edition is now available. Download your free book today!
> http://p.sf.net/sfu/NeoTech
> _______________________________________________
> Virtuoso-users mailing list
> Virtuoso-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/virtuoso-users
------------------------------------------------------------------------------
Learn Graph Databases - Download FREE O'Reilly Book
"Graph Databases" is the definitive new guide to graph databases and their
applications. Written by three acclaimed leaders in the field,
this first edition is now available. Download your free book today!
http://p.sf.net/sfu/NeoTech
_______________________________________________
Virtuoso-users mailing list
Virtuoso-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/virtuoso-users
