Optimize dendrite performance

modules/communication.nix

@@ -3,7 +3,13 @@
 with pkgs;
 
 # NOTE Reference the environment variable set in the corresponding agenix secret
-let database.connection_string = "$DB_STRING";
+let
+  database = {
+    connection_string = "$DB_STRING";
+    max_open_conns = 100;
+    max_idle_conns = 5;
+    conn_max_lifetime = -1;
+  };
 
 in {
   # Matrix server configuration
@@ -17,6 +23,7 @@ in {
         server_name = "coolneng.duckdns.org";
         private_key = config.age.secrets.dendrite.path;
         inherit database;
+        dns_cache.enabled = true;
       };
       # HACK Inherit postgres connection string for the rest of the DBs
       app_service_api = {

modules/webstack.nix

@@ -186,6 +186,10 @@
       host    all             all             127.0.0.1/32            trust
       host    all             all             ::1/128                 trust
     '';
+    settings = {
+      max_connections = "300";
+      shared_buffers = "512MB";
+    };
   };
 
   # Restart reverse proxy after services startup