Random Access Memory Amount

Ramdisks use or waste (depends on your point of view) memory. As you don't have a hard-disk, you can not swap memory. Therefore it is important to equip your machine with enough Memory to bear the load.

My system uses approximately 40 megabytes of RAM after booting. If I initiate an IPsec connection to the box, it uses another 0.5 Megabytes of RAM, for each additional connection. The postfix daemon itself uses some memory during processing of e-mails (I use it for notification E-Mails, see ). So 512 or 1024 megabytes of RAM should be enough for a production system with about 100 users.