We are currently experiencing issues adding large course Modules to our sharing cart which result in a 504 gateway timeout error. We previously had a similar issue that we were able to resolve as it was related to a flaw in the h5p library which we were able to resolve by setting in the main config.php
$CFG->extramemorylimit = '0';
The modules do actually end up in the cart after reopening the browser and when adding them into another course it is the same story, 504 timeout but when we log back in the module is in the course.
It seems that the operations actually succeed but they are taking longer than Moodle is happy to put up with. Is there some setting in the server that would allow these longer running operations to not throw 504 errors or am i misunderstanding the problem?