My Nix Configuration
[marvin] update postgres settings for new NVMe database
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+11
-27
hosts/marvin/services/postgres.nix
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hosts/marvin/services/postgres.nix
···
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package = pkgs.postgresql_16;
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enableJIT = true;
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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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settings = {
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# PGTune Settings
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max_connections = "300";
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shared_buffers = "2GB";
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effective_cache_size = "6GB";
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maintenance_work_mem = "512MB";
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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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checkpoint_completion_target = 0.9;
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wal_buffers = "16MB";
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default_statistics_target = 100;
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random_page_cost = 4;
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effective_io_concurrency = 2;
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work_mem = "2621kB";
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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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min_wal_size = "1GB";
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max_wal_size = "4GB";
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max_worker_processes = 8;
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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 = 8;
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max_parallel_maintenance_workers = 4;
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};
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};
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# systemd.timers.pg-autovacuum = {
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# description = "Timer for Postgres Autovacuum";
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# timerConfig = {
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# OnCalendar = "*-*-* 01:00:00";
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# Unit = "pg-autovacuum.service";
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# };
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# };
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# systemd.services.pg-autovacuum = {
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# description = "Vacuum all Postgres databases.";
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# requisite = [ "postgresql.service" ];
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# wantedBy = [ "multi-user.target" ];
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# serviceConfig = {
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# Type = "oneshot";
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# User = "postgres";
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# Group = "postgres";
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# SyslogIdentifier = "pg-autovacuum";
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# ExecStart = "${cfg.package}/bin/vacuumdb --all --echo --jobs=6 --parallel=5 --analyze --verbose";
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# };
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# };
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}