Confirm that you have on Formdiable Form with 5000 fields in the single form?
If so, explain to us how are you editing the Formidable form? The Formidale form editor is a known memory hog that has issues with extra-large forms.
You’d just have to test it, but my guess is that you will need to increase a lot of PHP settings. These are the settings we normally suggest for large forms.
max_execution_time = 600
max_input_time = 600
max_input_vars = 4000
memory_limit = 512M
post_max_size = 256M
session.gc_maxlifetime = 1440
However, I doubt these settings would be sufficient to complete a form with 5000 merged fields. If the plugin does not currently work for your needs, we will not be able to expand the functionality.
Again, we’ve never seen a form larger than the one we have tested. And checking that form today, it’s still extremely slow to edit in Formidable Forms due to the size…