How To Create SWAP Partition in EC2 Instance
In this tutorial we learn How To Create SWAP Partition in EC2 Instance. Originally this article published at https://coderssecret.com/ by Vishal Anand.
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How To Create SWAP Partition in EC2 Instance
Check if the system has any configured swap.
$ sudo swapon –show
If you get the output that means you already have a configured swap memory. For example.
NAME TYPE SIZE USED PRIO /dev/sda5 partition 8G 0B -1
If you don’t get any output means your system does not have a swap memory.
To create a swap memory follow these instructions:
Verify is there any swap memory or not?
$ free -h
total used free shared buff/cache available Mem: 5.3G 1.2G 2.4G 46M 1.7G 3.7G Swap: 0G 0B 0G
No swap memory is active If the Swap section is zero.
Check the system usages.
$ df -h
Filesystem Size Used Avail Use% Mounted on udev 2.7G 0 2.7G 0% /dev tmpfs 544M 8.2M 536M 2% /run /dev/sda1 184G 87G 88G 50% / tmpfs 2.7G 7.7M 2.7G 1% /dev/shm tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs 2.7G 0 2.7G 0% /sys/fs/cgroup cgmfs 100K 0 100K 0% /run/cgmanager/fs tmpfs 544M 36K 544M 1% /run/user/1000
In /dev/sda1 section the system has 184GB storage where 88GB is free. We have plenty of space for swap memory.
Create swap memory by allocating a space from storage:
$ sudo fallocate -l 1G /swapfile
Here I’m creating 1GB of swap memory. You can adjust it depending of the requirements.
Verify the space is allocated or not.
$ ls -lh /swapfile
Change the permission of swap memory to 600 so it can only accessible by root.
$ sudo chmod 600 /swapfile
mark the allocated space to be use use as a swap memory.
$ sudo mkswap /swapfile
Enable the swap space.
$ sudo swapon /swapfile
This space we allocated is currently temperory. After reboot it will deallocat the space.
So we have to make it permanent.
echo ‘/swapfile none swap sw 0 0’ | sudo tee -a /etc/fstab
And finally reboot the instance.
Originally this article published at https://coderssecret.com/ by Vishal Anand.
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