It's under serverconfig.xml.
It's location will vary depending on service provider.
With 64GB of ram, you should be doing fine with multiple people, we have 8-12 of us playing with 600 alive zombies at once on hoard night and it only uses about 10-11GB of memory for us on a 10K map.
If you...
You need to adjust your server setting, by default, lots of dedicated servers reset to the MAX cap for loading buildings, you really want it set to only 4 chunks.
The difference between them is almost 40fps if you are playing on a decent computer.
Right now, my dedicated server has 12 people...
I never said make zombies harder, I said you can adjust the loot quality and amount to reduce what you find through the map.
Additionally, the Navesgane map is a story based map, certain loot locations have higher loot values than if the POI was in a random gen map, so your issue with the...
You can adjust the settings and make the game harder or easier as suits your play style.
The server I have setup for my friends and I uses custom settings that include unique loot spawning such as most stuff is only 25% of what you normally would find; however, I've changed the config to allow...