Hi, we have a cronjob (a scheduled Windows task, actually) that calls an
API endpoint which in turn executes a SPARQL query.
Last night we've got the following error message in the logs of this task:
XDMP-MEMCANCELED: {
SELECT ?w ?e { ?e <http://www.example.org/schema/language> ?glanguage .
?e <http://www.example.org/schema/realizationOf> ?w .
?indw <http://www.example.org/schema/code> ?memberIndicator .
?indw <http://www.example.org/schema/objectType> <
http://www.example.org/lambda/objectType/300> .
?w <http://www.example.org/schema/objectType> <
http://www.example.org/lambda/objectType/301> .
?indw <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <
http://www.example.org/schema/work> .
?inde <http://www.example.org/schema/doiSuffix> ?doiVal .
?w <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <
http://www.example.org/schema/work> .
?w <http://www.example.org/schema/memberIndicator> ?memberIndicator .
?indm <http://www.example.org/schema/embodimentOf> ?inde .
OPTIONAL {
?eec <http://www.example.org/schema/isBlocked> ?eecIsBlocked .
?e <http://www.example.org/schema/exportChannel> ?eec .
?eec <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> "4" .
}
?inde <http://www.example.org/schema/realizationOf> ?indw .
?inde <http://www.example.org/schema/language> ?glanguage .
?indm <http://www.example.org/schema/availability> <
http://www.example.org/lambda/availability/100> .
BIND (if (fn:exists($eecIsBlocked) and $eecIsBlocked eq "true") then "true"
else "false" AS ?isExpressionBlocked) FILTER ($isExpressionBlocked eq
"false")
}
} -- Canceled because of memory usage
There is not actually a lot of content in this database so far, a
count(collection("triples")//sem:subject) returns just 323 243 items.
The machine has 8GB of memory and is only hosting this MarkLogic server
instance.
https://docs.marklogic.com/guide/messages/XDMP-en#XDMP-MEMCANCELED has this
to say:
Message Text:Canceled because of memory usage
Cause: The transaction was cancelled because MarkLogic's total memory usage
was too high.
Response: Retry the operation.
As you can imagine, it being a non-interactive task, retrying is not really
an option.
Thanks for any pointers.
cheers,
Jakob.
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