My Nix Configuration
[marvin] upgrade postgres to pg18
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hosts/marvin/services/databases.nix
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hosts/marvin/services/databases.nix
···
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services = {
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postgresql = {
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enable = true;
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package = pkgs.postgresql_16;
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enableJIT = true;
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package = pkgs.postgresql_18;
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# Settings taken from [PGTune](https://pgtune.leopard.in.ua/)
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# https://pgtune.leopard.in.ua/?dbVersion=16&osType=linux&dbType=mixed&cpuNum&totalMemory=16&totalMemoryUnit=GB&connectionNum&hdType=ssd
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# Current config URL:
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# https://pgtune.leopard.in.ua/?dbVersion=18&osType=linux&dbType=mixed&cpuNum=24&totalMemory=16&totalMemoryUnit=GB&connectionNum=100&hdType=nvme&dbSize=greater_ram
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settings = {
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# PGTune Settings
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max_connections = "300";
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max_connections = "100";
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shared_buffers = "4GB";
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effective_cache_size = "12GB";
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maintenance_work_mem = "1GB";
···
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wal_buffers = "16MB";
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default_statistics_target = 100;
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random_page_cost = 1.1;
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effective_io_concurrency = 200;
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work_mem = "19418kB";
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huge_pages = "off";
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effective_io_concurrency = 1000;
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work_mem = "16270kB";
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huge_pages = "try";
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jit = "off";
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wal_compression = "lz4";
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autovacuum_max_workers = 4;
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io_method = "io_uring";
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io_workers = 4;
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min_wal_size = "1GB";
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max_wal_size = "4GB";
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max_worker_processes = 16;
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max_parallel_workers = 16;
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max_parallel_workers_per_gather = 4;
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max_parallel_workers = 16;
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max_parallel_maintenance_workers = 4;
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};
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};