Questions about forgetful and chunk unloading.

[tonibm19]

I saw in the wiki that there is an schema that doesn't save chunks, only reads, and I thought it could be usefull for a hunger games server (no need to regenerate chunks, only restart server). I have some questions.
- How often are chunks unloaded in MCServer?
- Would be use forgetful schema a performance boost? Would ram use be reduced?