On the topic of performance check the resources in the "Hardware and performance" forum: https://moodle.org/mod/forum/view.php?id=596. (Yes, the resources are visible only when you compose a new discussion.)
P.S. Moodle is not the only software construction which is not compatible with Don Knuth nor Niklaus Wirth Plea for lean software.
;-P
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Course backup hangs - no error logs
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