Since I'm new to server management I wonder to myself how big the minecraft world has to be.
I also think that if I reduce my world size I can also greatly reduce ram usuage?
You can set the limit however you wish and yes the less world loading the server needs to do at a given time the less RAM is needed. I had this one customer loads on 15 people at once with just a tad bit of lag on a 512MB server (spigot with plugins). Because that server was simply a tidy PvPing area it barely needed memory to load the area. Also if the host limits disk space then it can keep your disk space under control as well, however as you may expects the smaller the world the less exploring, building area, and etc there will be. For certain things it doesn't matter (such as the PvPing area) but for a large surival server you will want to be sure there are enough of this. Else the server's world will be congested and "mined out". Another option is to reset the world once it does get this state.
Honestly you can just leave the setting as is. Minecraft does not render all at once, it will render any new chunks that have not been explored yet and save the chunks that have been explored to the disk. You won't run into any issues with the default world size.
I have an mcpro server. My max-world-size is set at just under 30 million.
Since I'm new to server management I wonder to myself how big the minecraft world has to be.
I also think that if I reduce my world size I can also greatly reduce ram usuage?
For a survival server it seems having a max world size of 29999984 is overkill but maybe I'm wrong.
Need advice, thanks!
You can set the limit however you wish and yes the less world loading the server needs to do at a given time the less RAM is needed. I had this one customer loads on 15 people at once with just a tad bit of lag on a 512MB server (spigot with plugins). Because that server was simply a tidy PvPing area it barely needed memory to load the area. Also if the host limits disk space then it can keep your disk space under control as well, however as you may expects the smaller the world the less exploring, building area, and etc there will be. For certain things it doesn't matter (such as the PvPing area) but for a large surival server you will want to be sure there are enough of this. Else the server's world will be congested and "mined out". Another option is to reset the world once it does get this state.
I hope these advice help you out.
Honestly you can just leave the setting as is. Minecraft does not render all at once, it will render any new chunks that have not been explored yet and save the chunks that have been explored to the disk. You won't run into any issues with the default world size.