RAM Usage

What is the minimum/recommended amount of RAM for asterisk 1.4/FreePBX? We have some machines that are constantly pegged at 98% RAM, but almost 0% processor. Is this a problem? The servers seem to be performing fine, i.e. no quality issues, etc. The servers have 256MB, by the way.

256 meg is to low, at least 512 meg is needed to run without the use of swap.

thanks for the reply. does the amount of calls or extensions come into play? we have about 5 extensions on the system.

No, that should not be significant. Minimum memory to run CLI Centos 5 is 128 M, add MySQL, Apache/php and Asterisk and you are way passed 256 M.