On 02 Jul 2004, at 09:37, Ross Boylan wrote:

> Newer Linux VM's grow memory dynamically, and do not start with any
> explicity memory limit.

There are two command-line options (with equivalent environment 
variables) to control how memory is allocated on Unix:

   If no options are given then memory is allocated dynamically with the 
limit set at 75% of the available virtual memory.

   If -memory N{mk} is given then memory is allocated statically; the 
argument to the option defines a hard upper limit.

   If -mmap N{mk} is given then memory is allocated dynamically, with an 
explicit upper limit to the amount of memory that will be allocated 
(but the "75% of available virtual memory" limit still applies).

Ian