having 1.5GB RAM I cannot allocate more than 512MB RAM in 4.10

[Matthias Buelow]

John wrote:

>>>what's the output of ulimit -d?
> You must be using a csh-derivative.  It is a built-in for the Bourne-
> shell family of shells.

the csh correspondent is "limit".

it only affects the shell and its children (so put a setting in 
/etc/profile, /etc/csh.login, or configure the limit via /etc/login.conf 
if you want it to be global).

mkb.