Hi, TLDR; Fuseki 1.x hangs every 5 hours, Fuseki 2 is fine. Might be a problem with Java.
We’ve been running Fuseki for many years here at POSC Caesar Association and been very happy with it. Recently we have had massive slow downs, that have resulted in us having to restart Fuseki. We run: Fuseki 1.0.1 and 1.1.2 in Docker with Oracle Java 8 on Ubuntu. We use the in-mem database. Our experience has been that, with a continues flow of queries (1 every 30 seconds) Fuseki will stop responding for more than 30 minutes very ~5 hours. Even during the night, when there are no queries running except for the ones that we use to monitor Fuseki (select 12 triples). I have tried: - Reduce number of queries - Increase ram to 4x (2GB) - Updated from 1.0.1 to 1.1.2 - Removed all complex queries - Changed to G1 GC Now I have upgraded to Fuseki 2. Which is the only solution that is holding. We’ve had 12 hours without any issues :) If anyone wants to diagnose these issues further I can provide more information about our setup (including our data). Cheers, Håvard M. Ottestad PCA Services (a part of POSC Caesar Association)
