--- a/sat/tools/common/async_utils.py	Sat Oct 15 20:37:00 2022 +0200
+++ b/sat/tools/common/async_utils.py	Sat Oct 15 20:37:00 2022 +0200
@@ -27,8 +27,13 @@
 log = getLogger(__name__)
 
 
-def async_lru(maxsize: Optional[int] = None) -> Callable:
-    """Decorator to cache async function results using LRU algorithm"""
+def async_lru(maxsize: Optional[int] = 50) -> Callable:
+    """Decorator to cache async function results using LRU algorithm
+
+        @param maxsize: maximum number of items to keep in cache.
+            None to have no limit
+
+    """
     def decorator(func: Callable) -> Callable:
         cache = OrderedDict()
         async def wrapper(*args) -> Awaitable: