diff -u b/sites/default/default.settings.php b/sites/default/default.settings.php
--- b/sites/default/default.settings.php
+++ b/sites/default/default.settings.php
@@ -193,8 +193,8 @@
  * );
  * @endcode
  *
- * Advanced users can also specify database layer connection security using the
- * 'pdo' attribute array as follows:
+ * Advanced users can also specify MySQL database layer connection security using the
+ * 'pdo' attribute for array as follows:
  * @code
  * 'pdo' => [
  *   MYSQL_ATTR_SSL_KEY => '/path/to/ssl-cert.key',
@@ -206,6 +206,30 @@
  * ],
  * @endcode
  *
+ * Now if you have the following settings in PostgreSQL:
+ * @code
+ * $databases['default']['default'] = array(
+ *   'init_commands' => array(
+ *     'sslmode' => 'require',
+ *   ),
+ * );
+ * @endcode
+ *
+ * For PostgreSQL SSL connection use the following settings:
+ * @code
+ * 'pdo' => [
+ *   PGSQL_ATTR_SSL_KEY => '/path/to/ssl-cert.key',
+ *   PGSQL_ATTR_SSL_CERT => '/path/to/ssl-cert.crt',
+ *   PGSQL_ATTR_SSL_CA => '/path/to/ca-cert.crt',
+ *   // Optional
+ *   PGSQL_ATTR_SSL_CAPATH => '/ca/path',
+ *   PGSQL_ATTR_SSL_CIPHER => 'ssl cipher',
+ * ],
+ * @endcode
+ *
+ * For SQLite database ssl connection settings are not required as it is
+ * only supported on localhost.
+ *
  * Any features supported by the PDO driver of the database can be put into
  * the 'pdo' attribute array, as defined in the php documentation.
  * @url http://php.net/manual/en/pdo.drivers.php