Editing Input syntax manual (section)

=== set memfrac ===

 '''set memfrac''' ''FRAC''

Defines the fraction of total system memory Serpent can allocate to its use. Input values:

{|
| <tt>''FRAC''</tt>
| : the fraction of system memory that Serpent is allowed to use (default value: 0.8)
|}

<u>Notes:</u>
*Serpent tries to read the system total memory from the first line of the file /proc/meminfo
*The fraction can also be set via a <tt>SERPENT_MEM_FRAC</tt> environmental variable.
*If the fraction is exceeded, the simulation will abort. 
**This is mainly to avert the use of swap-memory, which can make the system unresponsive.