Hi Hugh,
Yes I also increased the number of ServerThreads because, together
with the maximum number of file descriptors, Virtuoso was displaying a
message suggesting to increase the ServerThreads. When increasing the
ServerThreads, the last message disappeared but I still had a problem
with the file descriptors.
Anyway, your email made me think that the problem was that I was not
closing the connections to Virtuoso properly, my application is a NL
interface, and there are some heavy user queries that send more than
2000 sparql calls to Virtuoso .. and yes, that was the problem! It is
solved now :-) .. ( I did not have this problem when I was using my
Mac, only on the Linux server)
Thanks a lot!!!, I am very please with Virtuoso, it handles my 2000
queries in (almost) real time, without any tuning.
I just have some problems with the indexes / full text searches, for
instance, when querying for "museum " in DBpedia:
SELECT DISTINCT ?s ?o ?type FROM <http://dbpedia.org> WHERE {{?s
rdfs:label
?o. ?s rdf:type ?type .FILTER( bif:contains(?o, "museum" ) )}}LIMIT
350
I get the exact mapping: http://dbpedia.org/property/museum (label:
museum) after position 300, behind approximate mappings like
"Intrepid_Sea-Air-Space_Museum",
"National_Museum_of_the_American_Indian", "British_Museum", etc.. Is
there any way to get exact mappings first? I created the indexes in
the following way:
DB.DBA.RDF_OBJ_FT_RULE_ADD('http://dbpedia.org', null, 'dbpedia');
DB.DBA.VT_INC_INDEX_DB_DBA_RDF_OBJ();
Thanks again!
Vanessa
On 15 Sep 2010, at 23:08, Hugh Williams wrote:
Hi Vanessa,
Where are you encountering this error ?
FD_SET is the file descriptor set whose maximum size is determine by
the FD_SETSIZE parameter which is typically 1024 on Unix systems, so
I assume you are exceeding this some how. Have you increased any of
he parameters in your virtuoso configuration file (virtuoso.ini)
like ServerThreads for example which would result in a large number
of file descriptors being opened to the point of exceeding the
FD_SETSIZE maximum ?
Best Regards
Hugh Williams
Professional Services
OpenLink Software
Web: http://www.openlinksw.com
Support: http://support.openlinksw.com
Forums: http://boards.openlinksw.com/support
Twitter: http://twitter.com/OpenLink
On 15 Sep 2010, at 21:55, Vanessa Lopez wrote:
Hello,
Does anyone knows how to solve the problem
"Exceeded maximum number of file descriptors in FD_SET."
in Virtuoso? I install Virtuoso under Linux RedHat
Thanks a lot
V
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