Just like on some other UNIX systems, IRIX can use swap. This article explains how to enable swapfiles for more swap.

General Procedure

# mkfile -v 2048m /usr/swap

/usr/swap 2147483648 bytes

# swap -a /usr/swap

This will enable the file immediately. To ensure it works next boot add the following line to /etc/fstab:

/usr/swap swap swap pri=3 0 0