Update monolog.rst

Author: zhil

reference/configuration/monolog.rst

@@ -27,7 +27,8 @@ Full Default Configuration
                 main:
                     type:                fingers_crossed
                     action_level:        WARNING
-                    buffer_size:         30
+                    # by default buffer_size is unlimited, which could generate huge logs in some cases.
+                    buffer_size:         0
                     handler:             custom
                 console:
                     type:                console
@@ -97,6 +98,7 @@ Full Default Configuration
                     type="fingers_crossed"
                     action-level="warning"
                     handler="custom"
+                    buffer-size="0"
                 />
                 <monolog:handler
                     name="console"