commit 0808f5ad1d8377bfb4653b6d502ee97a2bd9335c · pyrox.dev/nixpkgs

+16 -1
nixos/modules/services/databases/redis.nix
···

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             enable = mkOption {

     

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               type = types.bool;

     

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               default = false;

     

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       -
               description = "Whether to enable the Redis server.";

     

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               description = ''

     

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                 Whether to enable the Redis server. Note that the NixOS module for

     

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                 Redis disables kernel support for Transparent Huge Pages (THP),

     

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                 because this features causes major performance problems for Redis,

     

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                 e.g. (https://redis.io/topics/latency).

     

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               '';

     

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             };

     

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             package = mkOption {

     
···

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             };

     

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           environment.systemPackages = [ cfg.package ];

     

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       +
       

     

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           systemd.services.disable-transparent-huge-pages = {

     

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             enable = config.services.redis.enable;

     

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             description = "Disable Transparent Huge Pages (required by Redis)";

     

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             after = [ "sysinit.target" "local-fs.target" ];

     

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             before = [ "redis.service" ];

     

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             wantedBy = [ "redis.service" ];

     

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             script = "echo never >/sys/kernel/mm/transparent_hugepage/enabled";

     

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             serviceConfig.Type = "oneshot";

     

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           };

     

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           systemd.services.redis =

     

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             { description = "Redis Server";