How to add swap to Amazon EC2 instance?

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I'm currently running an ec2 micro instance and i've been finding that the instance occasionally runs out of memory.

Other than using a larger instance size, what else can be done?

Sep 11, 2018 in AWS by datageek
• 2,440 points
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1 answer to this question.

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A fix for this problem is to add swap (i.e. paging) space to the instance.

Paging works by creating an area on your hard drive and using it for extra memory, this memory is much slower than normal memory however much more of it is available.

To add this extra space to your instance you type:

sudo /bin/dd if=/dev/zero of=/var/swap.1 bs=1M count=1024 sudo /sbin/mkswap /var/swap.1 sudo chmod 600 /var/swap.1 sudo /sbin/swapon /var/swap.1

If you need more than 1024 then change that to something higher.

answered Sep 11, 2018 by Archana
• 4,090 points

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