set pool_recycle option on create_engine()

server/djrandom/database.py

@@ -19,6 +19,7 @@ class SetTextFactory(PoolListener):
 
 def init_db(uri):
     from djrandom.model import mp3, playlist
-    engine = create_engine(uri, listeners=[SetTextFactory()])
+    engine = create_engine(uri, listeners=[SetTextFactory()],
+                           pool_recycle=1800)
     Session.configure(bind=engine)
     Base.metadata.create_all(engine)