[JENA-2228] Does Fuseki2 use TDB indexes or indexes for in-memory store?

• Type: Question
• Status: Closed
• Priority: Major
• Resolution: Information Provided
• Affects Version/s: Jena 3.17.0
• Component/s: Fuseki, TDB

Environment

I am running the jena-fuseki-server-3.17.0.jar file from jena-fuseki2/jena-fuseki-server/target/ as follows

java -Xmx500g -jar fuseki-jenaclone.jar --tdb2 --loc=db/jena --timeout=1000000 /jena &

• Assignee: Unassigned
• Reporter: Martin Pekár
• Created: 22/Dec/21 15:10
• Updated: 12/Jan/22 20:56
• Resolved: 12/Jan/22 20:55

Description

Based on logging messages inserted into various places in the indexes in the TDB module (NodeTupleTableConcrete, TupleIndexBase, NodeTableNative, BPlusTree), I can see that the B+ tree is only used once per query. I have inserted logging messages for every finding method to see which classes are used when querying. I would expect to the the B+ tree be used several times per query.

 

I use the error logging level, and I inserted logging in the class constructors to make sure logging worked. I see construction of all the index classes.