afs commented on issue #3432:
URL: https://github.com/apache/jena/issues/3432#issuecomment-3273976631

   >The container gets 16GB RAM in total
   
   > In any case I'll increase the heap limit from 1GB to 2GB and see if the 
issue persists.
   
   The graphs are consistent with the heap being too small - that's not proof.
   
   The heap needs in terms of bytes are dependent of the data, such as length 
of literals.
   
   Increasing the heap size is the first thing to try.
   It is possible to configure the largest cache (the TDB node table) in terms 
of number of entries (not byte size). It's easier to change the heap size as 
you have done to see if that changes the situation.
   
   The node table uses strong references. I've kept away from using weak 
references because weak references seem to come with their own system behaviour 
effects but it could be added as an option.
   


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