permanantly change vm.swappiness value

[Member andfree]

Whatever I tried in a friend’s laptop, vm.swappiness after rebooting is always equal to 1. I created /etc/sysctl.d/local.conf and set it like the advice in this topic:

# Uncomment the following two values to improve perceived system performance
# Threshold at which swapping starts
# Values lower than default favour filling physical RAM before beginning to use a swap area 
# Default vm.swappiness=60
vm.swappiness=10
#
# Threshold at which the directory and inode caches are reclaimed
# Values lower than default favour retaining them rather than recovering the memory they occupy
# Default vm.vfs_cache_pressure=100
vm.vfs_cache_pressure=50

After rebooting, vm.swappiness was still equal to 1. I removed the /etc/sysctl.d/local.conf file again and ran:

$ sudo sysctl vm.swappiness=5
vm.swappiness = 5

But after rebooting:

$ sudo sysctl vm.swappiness
vm.swappiness = 1

[Anonymous]

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That’s the expected result ~~ as you can confirm, by performing a websearch “vm.swappiness permanent”

[Member andfree]

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Thanks for the help. Web search helped me to find that the problem was the /etc/sysctl.conf file. There were the lines “vm.swappiness=1” and “vm.vfs_cache_pressure=50” (a bad copy-paste, probably by me, I suppose). I deleted these lines, edited /etc/sysctl.d/local.conf as shown in my initial post, rebooted, and everything is OK.

EDIT: I would mark this topic as solved, if I could.

• This reply was modified 5 years, 3 months ago by andfree.

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