On 11/08/2021 21:21, Brandon Sara wrote:
10s of millions triples of RDFS schema and no instance data?
Yeah, it’s kinda weird. I inherited this project and am working on fixing much
of the structuring, but in the mean time, need to keep it going as is. We are
loading ICD-10 CM, SNOMED CT, and many other medical ontologies/thesauri…hence
the large ontology. Pretty much every concept is treated as a class. At this
point in time, we are using ontology itself for some inference and mapping.
Eventually, we will be bringing instance data into the KG to do more powerful
inference using the medical ontologies I mentioned.
Try running without it as a test.
The transitive reasoner fires up either as the when the server starts or
first request (can't remember which).
custom:id has super properties?
No
From what you've said, that takes not much memory - at very worse, it
populates the node cache which is an LRU cache and usually 2G is enough.
(unless you have a lot of very large literals - many lines of text).
is the request causing the database to be sync'ed before the request starts?
Yes
That's a source of RAM use if there are large pending updates.
Also try the query
SELECT * {} or ASK{}
which does all the end-to-end stuff for setup and sync but does not
touch the data.
The other thing to try is point VisualVM at the process and look for the
memory usage and heap usage.
Andy
