On 03.03.18 17:11, Andy Seaborne wrote: Hi Andy,
> Do you have an example of such an update? yes I can deliver two use-cases, with data and query. First one is this dataset: http://ktk.netlabs.org/misc/rdf/fuseki-lock.nq.gz Query: https://pastebin.com/7TbsiAii This returns reliably in Stardog, in less than one minute. The UNION is most probably necessary due to blank-nodes issues so I don't think I can split them. In Fuseki it runs out with Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit exceeded And I once allocated almost all I had on my system (> 8GB) > Some cases can't stream, but it is possible some cases aren't streaming > when they could. ok > Or the whole transaction is quite large which is where TDB2 comes in. I did try that on TDB2 recently as well, same issue. Will post the other sample later. regards Adrian