Attempt at shrinking memory usage

config/dev.exs

@@ -3,6 +3,7 @@ import Config
 # Configure your database
 config :music_library, MusicLibrary.Repo,
   database: Path.expand("../data/music_library_dev.db", __DIR__),
+  cache_size: -8000,
   pool_size: 10,
   stacktrace: true,
   show_sensitive_data_on_connection_error: true

config/runtime.exs

@@ -39,7 +39,7 @@ if config_env() == :prod do
   config :music_library, MusicLibrary.Repo,
     database: database_path,
     # 16MB * pool_size = base memory usage
-    cache_size: -16000,
+    cache_size: -8000,
     pool_size: String.to_integer(System.get_env("POOL_SIZE") || "5")
 
   # The secret key base is used to sign/encrypt cookies and other secrets.