The title says it. I've been looking on the forums and etc. Changing the rates doesn't affect the spawns much. It stays at an average 10-15% (approximately) of it's available spawns (eg. 48/539) when a player is connected and even less when I haven't connected to the server (I think it starts despawning aswell if I leave).
All of the other entities in the spawn.report output are using all of their available spawns and seem to be working fine, except for junkpiles.
And I'm talking about the road junkpiles, water one's are fine.
I also tried wiping the map, deleting every plugin (except oxide), setting a bigger size map (this resulted me with more spawned junkpiles, but it had more available spawns aswell so it was at around 10-15%).
spawn.fill_groups and spawn.fill_populations also seem to have no effect on the spawn rate/quantity.