Rewritten check_mem_usage [demos]
Rewritten check_mem_usage [demos]


Former-commit-id: 3167211412303f42bb137d50adf8cb4945c07198 [formerly 1049764ab16136d13608fad5ba524cfd800517b3]
Former-commit-id: dc6ba302acc0ccc524a450e9074994dc79ee823b
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine