I can actually confirm that this was happening to me as well on a VM with 4GB RAM and TDB store (thus not in-memory). As more and more queries were made, RAM filled up, then the SWAP filled up, and at that point I had to reboot the machine. My solution was just to restart the server with a cronjob.
> Sent: Tuesday, July 27, 2021 at 3:19 PM > From: "Marco Fiocco" <[email protected]> > To: [email protected] > Subject: In-memory Fuseki keeps growing memory indefinitely even if idle > > Hello, > > I'm running a in-memory Fuseki 3.16 server and I see that the allocated > memory keeps growing linearly indefinitely even if idle. > Initially I reserved 1GB of memory and I've noticed that the process gets OOM > killed every 2 hours. Now I've allocated 2GB because I've read somewhere that > 2GB is the minimum for Java heaps. Is that true? > I'm waiting to see if it will get again. > Is this a bug or there is a better way to config it? > > My Fuseki config is: > > @prefix fuseki: <http://jena.apache.org/fuseki#> . > @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . > @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . > @prefix tdb: <http://jena.hpl.hp.com/2008/tdb#> . > @prefix ja: <http://jena.hpl.hp.com/2005/11/Assembler#> . > @prefix : <#> . > > [] rdf:type fuseki:Server . > > <#service> rdf:type fuseki:Service ; > rdfs:label "Dataset with SHACL validation" ; > fuseki:name "ds" ; > # See the > endpoint url in build.gradle > fuseki:serviceReadWriteGraphStore "data" ; > # SPARQL Graph store > protocol (read and write) > fuseki:endpoint [ fuseki:operation fuseki:query ; fuseki:name > "sparql" ] ; # SPARQL query service > fuseki:endpoint [ fuseki:operation fuseki:shacl ; fuseki:name > "shacl" ] ; # SHACL query service > fuseki:dataset <#dataset> . > > ## In memory TDB with union graph. > <#dataset> rdf:type tdb:DatasetTDB ; > tdb:location "--mem--" ; > # Query timeout on this dataset (1s, 1000 milliseconds) > ja:context [ ja:cxtName "arq:queryTimeout" ; ja:cxtValue "1000" ] ; > # Make the default graph be the union of all named graphs. > tdb:unionDefaultGraph true . > > Thanks > Marco >
