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QueryEngine encounters a "Error: 5 Out of memory" #2130
 observed a "Error: 5 Out of memory" [1, 2] which indicates a severe issue with the DB back-end configuration and causing a SQL request to fail for a simple query like:
This issue cannot be solved by SMW where the DB back-end itself is refusing (or better is incapable to answer) the request due to technical limitations.
It is suggested to consult the MySQL documentation [1, 2] to see whether increasing the "buffer_size" can help mitigate the encountered issue or not.