Document Disable collection of PdpStatistics

Issue-ID: POLICY-3459
Change-Id: I108fff4a293ccccff35afbc636c7f04880f0dc3c
Signed-off-by: adheli.tavares <adheli.tavares@est.tech>
diff --git a/docs/pap/pap.rst b/docs/pap/pap.rst
index fe2288b..0f7c0c6 100644
--- a/docs/pap/pap.rst
+++ b/docs/pap/pap.rst
@@ -369,11 +369,27 @@
 .. literalinclude:: response/pdp-statistics-pap-resp.json
     :language: json
 
-
-3 Future Features
+3 Configuration
 =================
 
-3.1 Disable policies in PDP
+3.1 Disable collection of PDP Statistics
+========================================
+
+This configuration is to inform PAP to not save the PDP statistics in the database.
+
+In `config.json
+<https://github.com/onap/policy-pap/blob/master/packages/policy-pap-tarball/src/main/resources/etc/defaultConfig.json>`_,
+add or change the property savePdpStatisticsInDb to false.
+
+.. note::
+  By default, if the property is not present, it will be considered as false and
+  PDP statistics will not be saved in the database.
+
+
+4 Future Features
+=================
+
+4.1 Disable policies in PDP
 ===========================
 
 This operation will allow disabling individual policies running in PDP engine. It is mainly beneficial