diff --git a/ansible/roles/loadbalancer/defaults/main.yml b/ansible/roles/loadbalancer/defaults/main.yml
index 722d8a1033..7a7a1f5746 100644
--- a/ansible/roles/loadbalancer/defaults/main.yml
+++ b/ansible/roles/loadbalancer/defaults/main.yml
@@ -122,6 +122,7 @@ proxysql_workers: "{{ openstack_service_workers }}"
 proxysql_max_connections: 40000
 # The maximum number of connections to mariadb backends.
 proxysql_backend_max_connections: 10000
+proxysql_backend_max_replication_lag: "0"
 proxysql_admin_user: "kolla-admin"
 proxysql_stats_user: "kolla-stats"
 
diff --git a/ansible/roles/loadbalancer/templates/proxysql/proxysql.yaml.j2 b/ansible/roles/loadbalancer/templates/proxysql/proxysql.yaml.j2
index 4e1e8ea57f..f5c6f38a31 100644
--- a/ansible/roles/loadbalancer/templates/proxysql/proxysql.yaml.j2
+++ b/ansible/roles/loadbalancer/templates/proxysql/proxysql.yaml.j2
@@ -33,6 +33,7 @@ mysql_servers:
     port :  {{ database_port }}
     hostgroup :  {{ WRITER_GROUP }}
     max_connections: {{ proxysql_backend_max_connections }}
+    max_replication_lag: {{ proxysql_backend_max_replication_lag }}
     weight :  {{ WEIGHT }}
     comment :  "Writer {{ host }}"
 {% endfor %}
diff --git a/releasenotes/notes/proxysql-conf-max-replication-lag-9c8f8f26cd92d66d.yaml b/releasenotes/notes/proxysql-conf-max-replication-lag-9c8f8f26cd92d66d.yaml
new file mode 100644
index 0000000000..bf2d5eb6ab
--- /dev/null
+++ b/releasenotes/notes/proxysql-conf-max-replication-lag-9c8f8f26cd92d66d.yaml
@@ -0,0 +1,11 @@
+---
+features:
+  - |
+    Adds ability to configure ProxySQL's max replication lag
+    via configuration value ``proxysql_backend_max_replication_lag``
+    which is set to default value as per documentation. If it is
+    greater than 0, ProxySQL will regularly monitor replication lag
+    and if it goes beyond the configured threshold it will temporary
+    shun the host until replication catches up. Please see the official
+    `upgrade notes <https://proxysql.com/documentation/main-runtime>`__
+    for more detail.