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+.. ischooklib:: libdhcp_perfmon.so
+.. _hooks-perfmon:
+
+``libdhcp_perfmon.so``: PerfMon
+===============================
+
+This hook library can be loaded by either kea-dhcp4 or kea-dhcp6 servers
+to extend them with the ability to track and report performance related data.
+
+.. note::
+
+    This library is currently under development and not yet functional.
+
+Overview
+~~~~~~~~
+
+The library, added in Kea 2.5.6, can be loaded by the :iscman:`kea-dhcp4` or
+:iscman:`kea-dhcp6` daemon by adding it to the ``hooks-libraries`` element of
+the server's configuration:
+
+.. code-block:: javascript
+
+    {
+        "hooks-libraries": [
+            {
+                "library": "/usr/local/lib/libdhcp_perfmon.so",
+                "parameters": {
+                    ...
+                }
+            },
+            ...
+        ],
+        ...
+    }
+
+Configuration
+~~~~~~~~~~~~~
+
+    TBD