Extreme server lag and delay once the player count reaches above 16

[Legions]

Hello there,
New server here having trouble with some extreme delays and lag once our population reaches above 16. The moment it drops below 16 everything returns back to normal.
Any idea on where to start looking? Checked resmon 1 and no resource seemed to be a problem. Could it possibly be disc-inventory that we are using? the amount of import cars? We are really unfamiliar with issues such as this.
Thank you for your time.

[ChristopherM]

Maybe take a look at this, see if anything turns up:

[How-to] Use the profiler command to identify problematic scripts

Introduction In a recent update to FiveM, we have a very easy and in game tool which we can use to identify the exact lines of code and threads causing issues within your server! This can be used both server side, to help find hitch warnings, or client side to improve FPS. This guide will not explain how to fix these issues, simply how to identify where they are so you can tweak and research to fix them Prerequisites To ensure profiler works, make sure your client is up to date, and you are …

[Legions]

thank you so much, will be taking a look shortly