Update metrics_stream_engine.md

add db_config

Author: maayanagranat

content/operate/rs/monitoring/metrics_stream_engine.md

@@ -116,4 +116,5 @@ For database performance, availability, and efficiency, monitor the following me
 | Security – LDAP | <span class="break-all">`endpoint_successful_ldap_authentication`</span>,<br /><span class="break-all">`endpoint_failed_ldap_authentication`</span>,<br /><span class="break-all">`endpoint_disconnected_ldap_client`</span> | Monitor authentication health and detect brute-force attacks or misconfigurations. | Counter |
 | Security – cert-based | <span class="break-all">`endpoint_successful_cba_authentication`</span>,<br /><span class="break-all">`endpoint_failed_cba_authentication`</span>,<br /><span class="break-all">`endpoint_disconnected_cba_client`</span> | Monitor certificate authentication status and failures. | Counter |
 | Security – password | <span class="break-all">`endpoint_disconnected_user_password_client`</span> | Monitor password-authentication client disconnects and correlate with policy changes. | Counter |
-| Security – ACL | <span class="break-all">`acl_access_denied_auth`</span>,<br /><span class="break-all">`acl_access_denied_cmd`</span>,<br /><span class="break-all">`acl_access_denied_key`</span>,<br /><span class="break-all">`acl_access_denied_channel`</span> | Monitor unauthorized access attempts and incorrectly scoped ACLs. | Counter |
+| Security – ACL | <span class="break-all">`redis_server_acl_access_denied_auth`</span>,<br /><span class="break-all">`redis_server_acl_access_denied_cmd`</span>,<br /><span class="break-all">`redis_server_acl_access_denied_key`</span>,<br /><span class="break-all">`redis_server_acl_access_denied_channel`</span> | Monitor unauthorized access attempts and incorrectly scoped ACLs. | Counter |
+| Configuration | <span class="break-all">`db_config`</span>| This is an information metric that holds database configuration within labels such as: db_name, db_version, db_port, tls_mode. | counter |