Borge on "How do I fix 'Fatal error: Allowed memory size of 94371840 bytes exhausted' ?"

@WPJ
Terribly sorry about the confusion, I stepped in to clear up some misinformation and misconceptions going on to avoid anyone from making any mistakes that might come back and bite them later on :)

Basically, any file in the wp-admin or wp-includes directories should never be edited directly (unless you know what you are doing in there and are aware of the limitations and drawbacks this imposes).

If your site requires this much memory, it would be advisable to contact your host about possibly getting an upgrade, or looking into what is using so much memory (if your site is business critical, and you are unfamiliar with how to diagnose it or just don't want to dive into it, I would suggest looking to hire someone to look into it for you).

If you are familiar with it and feel like getting your hands dirty, these two plugins are great approaches to getting started:
https://wordpress.org/plugins/p3-profiler/
https://wordpress.org/plugins/query-monitor/

The P3 Profiler being the simplest one to get started with, as the Query Monitor one requires you to make configuration changes.