diff --git a/en/reference/services-content.html b/en/reference/services-content.html
index c4b6c27877..5d0c1fe602 100644
--- a/en/reference/services-content.html
+++ b/en/reference/services-content.html
@@ -221,7 +221,9 @@ <h2 id="documents">documents</h2>
   <td>integer</td>
   <td>3600</td>
   <td>
-    <p id="documents.garbage-collection-interval">Time (in seconds) between garbage collection cycles.</p>
+    <p id="documents.garbage-collection-interval">Time (in seconds) between garbage collection cycles.
+      Note that the deletion of documents is spread over this interval, so more resources will be
+      used for deleting a set of documents with a small interval than with a larger interval.</p>
   </td></tr>
 </tbody>
 </table>