Swap space not used

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http://unix.stackexchange.com – I recently installed Debian 6.0.6. Here are the machine's states: CPU - AMD XP 3000+ RAM - 1 Gig HDD - IDE 80 Gig I primarily use this machine for developing toy personal projects. When I run NetBeans, I sometimes get a low memory error. Running top shows that, sure enough, RAM is at almost 100% usage. However, swap space usage is at 0. Does this mean that the swap partition that I created during installation is not enabled. I assumed that after creating the swap partition the installation process would automatically enable it. What do I need to do to enable swapping? (HowTos)