RAM Sizing

Picking the appropriate amount of RAM for the server depends mostly on the CPU selection. With MageStack, there is a direct relationship between CPU cores and memory utilisation; similarly, there is a relationship between the server role and memory utilisation (but this is more difficult to predict).

Distribution

On a typical, single-server set up, the ideal memory distribution is as follows

Eg. On an 8 core server, you could calculate memory requirements as follows

db = (( lb + mail + monitor + acc ) + ( web )) / 2
db = (( 1.5 + 0.5 + 1.5 + 2 ) + ( cpu cores / 2 )) / 2
db = (( 5.5 ) + ( 8 / 2 )) / 2
db = ( 5.5 + 4 ) / 2
db = 9.5 / 2
db = 4.75

total = lb + web + db + mail + monitor + acc
total = 1.5 + 4 + 4.75 + 0.5 + 1.5 + 2
total = 14.25GB ~16GB

CPU Cores