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25 lines
538 B
Nix
25 lines
538 B
Nix
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{
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lib,
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config,
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...
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}: let
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inherit (lib.modules) mkIf;
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in {
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# compress half of the ram to use as swap
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# basically, get more memory per memory
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zramSwap = {
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enable = true;
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algorithm = "zstd";
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memoryPercent = 90; # defaults to 50
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};
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boot.kernel.sysctl = mkIf config.zramSwap.enable {
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# zram is relatively cheap, prefer swap
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"vm.swappiness" = 180;
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"vm.watermark_boost_factor" = 0;
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"vm.watermark_scale_factor" = 125;
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# zram is in memory, no need to readahead
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"vm.page-cluster" = 0;
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};
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}
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