feat(compute01): Add postgres config

machines/compute01/_configuration.nix

@@ -20,6 +20,7 @@ lib.extra.mkConfig {
     "nextcloud"
     "outline"
     "plausible"
+    "postgresql"
     "rstudio-server"
     "satosa"
     "signald"

machines/compute01/postgresql.nix

@@ -0,0 +1,28 @@
+{ pkgs, ... }:
+
+{
+  services.postgresql = {
+    enable = true;
+
+    package = pkgs.postgresql_14;
+
+    settings = {
+      checkpoint_completion_target = 0.90625;
+      default_statistics_target = 100;
+      effective_cache_size = "32GB";
+      effective_io_concurrency = 200;
+      maintenance_work_mem = "2GB";
+      max_connections = 500;
+      max_parallel_maintenance_workers = 4;
+      max_parallel_workers = 12;
+      max_parallel_workers_per_gather = 4;
+      max_wal_size = "4GB";
+      max_worker_processes = 12;
+      min_wal_size = "1GB";
+      random_page_cost = 1.125;
+      shared_buffers = "16GB";
+      wal_buffers = "16MB";
+      work_mem = "83886kB";
+    };
+  };
+}