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Created September 12, 2023 08:24
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[SWAP 101] Swap 101 #linux #swap #101
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SWAP-101.md

SWAP 101

  • Allocate swap sudo fallocate -l 1G /swapfile

  • Alternate allocation sudo dd if=/dev/zero of=/swapfile bs=1024 count=1048576

  • Perms sudo chmod 600 /swapfile

  • Setup swap sudo mkswap /swapfile

  • Enable swap sudo swapon /swapfile

  • /etc/fstab entry /swapfile swap swap defaults 0 0

  • Show swap sudo swapon --show

  • Adjust swapiness #60 good for all, put lower value for production servers cat /proc/sys/vm/swappiness

  • Setup swapiness sudo sysctl vm.swappiness=10

  • /etc/sysctl.conf vm.swappiness=10

  • Remove swap sudo swapoff -v /swapfile

  • Delete swap file sudo rm /swapfile

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