Reduce default db pool size to 30 (ref #4282)

config/defaults.hjson

@@ -34,7 +34,7 @@
     # Name of the postgres database for lemmy
     database: "string"
     # Maximum number of active sql connections
-    pool_size: 95
+    pool_size: 30
   }
   # Settings related to activitypub federation
   # Pictrs image server configuration.

crates/utils/src/settings/structs.rs

@@ -102,7 +102,7 @@ pub struct DatabaseConfig {
   pub(crate) connection: DatabaseConnection,
 
   /// Maximum number of active sql connections
-  #[default(95)]
+  #[default(30)]
   pub pool_size: usize,
 }