This works as a separate query, but not in a the middle, since ?s gets
new values instead of binding to previous ?s.
{ select ?t where {
?s a ?t .
} limit 10}
?t skos:prefLabel ?l
On 17/10/2022 14.56, Mikael Pesonen wrote:
?s a ?t .
?t skos:prefLabel ?l
returns 3 million triples. Maybe it's related to this?
On 21/09/2022 9.15, Lorenz Buehmann wrote:
Weird, only 10M triples and each triple pattern returns only 1
binding, thus, the size is tiny - honestly I can't think of anything
except for open connections, but as you mentioned, running the
queries with only one triple pattern works as expected, so that too
many open connections shouldn't be an issue most likely.
Can you reproduce this behavior with newer Jena versions like 4.6.1?
Or can you reproduce this on different servers as well?
Is it also stuck of your run the query directly after you restart
Fuseki?
On 19.09.22 13:49, Mikael Pesonen wrote:
On 15/09/2022 17.48, Lorenz Buehmann wrote:
Forgot:
- size of result for each triple pattern? Might affect if hash join
can be used.
It's one row for each.
- your hardware?
Normal server with 16gigs mem.
- is it just the first query after starting Fuseki? Connections
have been closed? Note, there was also a bug in a recent Jena
version, but only with TDB and too many open connections. It has
been resolved with release 4.6.1.
Jena has been running quite a while.
Might not be related, but I'm mentioning all things here nevertheless.
On 15.09.22 11:16, Mikael Pesonen wrote:
This returns one row fast, say :C1
SELECT *
FROM <https://a.b.c>
WHERE {
<https://x.y.z> a ?t .
#?t skos:prefLabel ?l
}
and this too:
SELECT *
FROM <https://a.b.c>
WHERE {
#<https://x.y.z> a ?t .
:C1 skos:prefLabel ?l
}
But this always hangs until timeout
SELECT *
FROM <https://a.b.c>
WHERE {
<https://x.y.z> a ?t .
?t skos:prefLabel ?l
}
What am I missing here? I'm using Fuseki web GUI. Thanks!
--
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Mikael Pesonen
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e-mail: mikael.peso...@lingsoft.fi
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