diff --git a/config/runtime.exs b/config/runtime.exs
index 4baeb4e3..c7dc94ac 100644
--- a/config/runtime.exs
+++ b/config/runtime.exs
@@ -38,6 +38,8 @@ if config_env() == :prod do
 
   config :music_library, MusicLibrary.Repo,
     database: database_path,
+    # 16MB * pool_size = base memory usage
+    cache_size: -16000,
     pool_size: String.to_integer(System.get_env("POOL_SIZE") || "5")
 
   # The secret key base is used to sign/encrypt cookies and other secrets.