Re: [NTG-context] lots of luatex process/instances (ps xa| grep lua / top -----sort by memory)

Sometimes, I get errors and an interactive prompt that I kill with either ctrl+C or ctrl+Z (at random).

You shouldn't do that. Type 'x' at the error prompt, it makes (Lua)TeX terminate. Ctrl+C sometimes isn't enough to kill LuaTeX, though I have no idea why; as for Ctrl+Z, it never kills anything, it sends the suspend signal (you should see the process status with top).

"killall luatex" and kill -15 PID does nothing.

kill -1 is usually enough. Arthur