68 lines
1.7 KiB
Nix
68 lines
1.7 KiB
Nix
{
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pkgs,
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...
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}:
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{
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services.postgresql = {
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enable = true;
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package = pkgs.postgresql_15;
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port = 5432;
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enableTCPIP = true;
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# Initial database setup
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initialScript = pkgs.writeText "backend-init-script" ''
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CREATE USER postgres WITH SUPERUSER PASSWORD 'postgres';
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'';
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# Raspberry Pi 4 optimized settings (2GB RAM assumed)
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settings = {
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# Memory settings (RPi 4 has limited RAM)
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shared_buffers = "128MB";
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effective_cache_size = "512MB";
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maintenance_work_mem = "32MB";
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work_mem = "2MB";
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wal_buffers = "4MB";
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# Connection settings
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max_connections = 20;
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# Performance tuning for ARM/RPi
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random_page_cost = 2.0;
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effective_io_concurrency = 100;
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# WAL settings (conservative for SD card)
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wal_level = "replica";
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checkpoint_timeout = "15min";
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checkpoint_completion_target = 0.7;
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min_wal_size = "1GB";
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max_wal_size = "4GB";
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# Query planning
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default_statistics_target = 50;
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# Logging
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log_min_duration_statement = 1000;
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log_duration = false;
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# ARM/RPi specific
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cpu_index_tuple_cost = 0.1;
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cpu_operator_cost = 0.05;
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};
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};
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# Enable the PostgreSQL service to start on boot
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systemd.services.postgresql.wantedBy = [ "multi-user.target" ];
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# Create mount point for external USB storage (optional, for better performance)
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# Uncomment if using the USB 3 storage we configured earlier
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# systemd.tmpfiles.rules = [
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# "d /mnt/nix-storage/postgresql 0700 postgres postgres"
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# ];
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# environment.etc."postgresql/postgresql.conf".text = ''
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# data_directory = '/mnt/nix-storage/postgresql'
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# '';
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}
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