diff --git a/contrib/prometheus-exporter/README b/contrib/prometheus-exporter/README
index 5b163d1..f948ac9 100644
--- a/contrib/prometheus-exporter/README
+++ b/contrib/prometheus-exporter/README
@@ -73,7 +73,9 @@
   /metrics?scope=*&scope=               # ==> no metrics will be exported
   /metrics?scope=&scope=global          # ==> global metrics will be exported
 
-* Filtering on servers state
+* How do I prevent my prometheus instance to explode?
+
+** Filtering on servers state
 
 It is possible to exclude from returned metrics all servers in maintenance mode
 passing the parameter "no-maint" in the query-string. This parameter may help to
@@ -82,6 +84,26 @@
 state. So, if the state of a server changes while the exporter is running, only
 a part of the metrics for this server will be dumped.
 
+prometheus example config:
+
+For server-template users:
+- <job>
+  params:
+    no-maint:
+    - empty
+
+** Scrap server health checks only
+
+All health checks status are dump through `state` label values. If you want to
+scrap server health check status but prevent all server metrics to be saved,
+except the server_check_status, you may configure prometheus that way:
+
+- <job>
+   metric_relabel_configs:
+   - source_labels: ['__name__']
+      regex: 'haproxy_(process_|frontend_|backend_|server_check_status).*'
+      action: keep
+
 Exported metrics
 ------------------
 
@@ -292,30 +314,3 @@
 | haproxy_server_used_connections_current            | Current number of connections in use.                                     |
 | haproxy_server_need_connections_current            | Estimated needed number of connections.                                   |
 +----------------------------------------------------+---------------------------------------------------------------------------+
-
-Mapping of health check status :
-
-   0 : HCHK_STATUS_UNKNOWN  (Unknown)
-   1 : HCHK_STATUS_INI      (Initializing)
-
-   4 : HCHK_STATUS_HANA     (Health analyze detected enough consecutive errors)
-
-   5 : HCHK_STATUS_SOCKERR  (Socket error)
-
-   6 : HCHK_STATUS_L4OK     (L4 check passed, for example tcp connect)
-   7 : HCHK_STATUS_L4TOUT   (L4 timeout)
-   8 : HCHK_STATUS_L4CON    (L4 connection problem)
-
-   9 : HCHK_STATUS_L6OK     (L6 check passed)
-  10 : HCHK_STATUS_L6TOUT   (L6 (SSL) timeout)
-  11 : HCHK_STATUS_L6RSP    (L6 invalid response - protocol error)
-
-  12 : HCHK_STATUS_L7TOUT   (L7 (HTTP/SMTP) timeout)
-  13 : HCHK_STATUS_L7RSP    (L7 invalid response - protocol error)
-  15 : HCHK_STATUS_L7OKD    (L7 check passed)
-  16 : HCHK_STATUS_L7OKCD   (L7 check conditionally passed)
-  17 : HCHK_STATUS_L7STS    (L7 response error, for example HTTP 5xx)
-
-  18 : HCHK_STATUS_PROCERR  (External process check failure)
-  19 : HCHK_STATUS_PROCTOUT (External process check timeout)
-  20 : HCHK_STATUS_PROCOK   (External process check passed)