diff --git a/README.rst b/README.rst
index 2a9932b..1cceabc 100644
--- a/README.rst
+++ b/README.rst
@@ -48,6 +48,25 @@
           - host: 10.20.0.104
             port: 11211
 
+Setting event cleanup
+
+In order to allow events cleanup from one node of the cluster,
+server:role field should be set to primary and all others to
+secondary to avoid race conditions. On the example below
+expirer is set to run every day at 2:00 AM. By default
+it will be run every hour.
+
+.. code-block:: yaml
+
+    panko:
+      server:
+        role: primary
+        expirer:
+          cron:
+            minute: 0
+            hour: 2
+
+
 Enhanced logging with logging.conf
 ----------------------------------