diff --git a/managed/data/alerting-templates/mongodb_down.yml b/managed/data/alerting-templates/mongodb_down.yml
index 0e1c3402232..7a6ca7fc7fd 100644
--- a/managed/data/alerting-templates/mongodb_down.yml
+++ b/managed/data/alerting-templates/mongodb_down.yml
@@ -3,7 +3,20 @@ templates:
   - name: pmm_mongodb_down
     version: 1
     summary: MongoDB down
-    expr: sum by (service_name, node_name) (mongodb_up) == bool 0 and on(node_name) pmm_managed_inventory_agents{agent_type="mongodb_exporter", disabled="0"}
+    expr: |
+      (
+        # enabled exporters we should be watching (from inventory — always present)
+        max by (service_id, service_name, node_name) (
+          pmm_managed_inventory_agents{agent_type="mongodb_exporter", disabled="0"}
+        )
+        # drop the ones that are up → leaves down + missing (value 1)
+        unless on (service_id) (max by (service_id) (mongodb_up) == 1)
+      )
+      or
+      # baseline 0 for every enabled service so healthy ones stay Normal (not MissingSeries)
+      0 * max by (service_id, service_name, node_name) (
+        pmm_managed_inventory_agents{agent_type="mongodb_exporter", disabled="0"}
+      )
     for: 1m
     severity: critical
     annotations:
diff --git a/managed/data/alerting-templates/postgresql_down.yml b/managed/data/alerting-templates/postgresql_down.yml
index b5a4e96e2e8..8d93cb15fab 100644
--- a/managed/data/alerting-templates/postgresql_down.yml
+++ b/managed/data/alerting-templates/postgresql_down.yml
@@ -3,7 +3,20 @@ templates:
   - name: pmm_postgresql_down
     version: 1
     summary: PostgreSQL down
-    expr: sum by (service_name, node_name) (pg_up) == bool 0 and on(node_name) pmm_managed_inventory_agents{agent_type="postgres_exporter", disabled="0"}
+    expr: |
+      (
+        # enabled exporters we should be watching (from inventory — always present)
+        max by (service_id, service_name, node_name) (
+          pmm_managed_inventory_agents{agent_type="postgres_exporter", disabled="0"}
+        )
+        # drop the ones that are up → leaves down + missing (value 1)
+        unless on (service_id) (max by (service_id) (pg_up) == 1)
+      )
+      or
+      # baseline 0 for every enabled service so healthy ones stay Normal (not MissingSeries)
+      0 * max by (service_id, service_name, node_name) (
+        pmm_managed_inventory_agents{agent_type="postgres_exporter", disabled="0"}
+      )
     for: 1m
     severity: critical
     annotations:
diff --git a/managed/data/alerting-templates/redis_down.yml b/managed/data/alerting-templates/redis_down.yml
index 670e0758992..7c5b775847d 100644
--- a/managed/data/alerting-templates/redis_down.yml
+++ b/managed/data/alerting-templates/redis_down.yml
@@ -3,7 +3,20 @@ templates:
   - name: pmm_redis_down
     version: 1
     summary: Redis down
-    expr: sum by (service_name, node_name) (redis_up) == bool 0 and on(node_name) pmm_managed_inventory_agents{agent_type="valkey_exporter", disabled="0"}
+    expr: |
+      (
+        # enabled exporters we should be watching (from inventory — always present)
+        max by (service_id, service_name, node_name) (
+          pmm_managed_inventory_agents{agent_type="valkey_exporter", disabled="0"}
+        )
+        # drop the ones that are up → leaves down + missing (value 1)
+        unless on (service_id) (max by (service_id) (redis_up) == 1)
+      )
+      or
+      # baseline 0 for every enabled service so healthy ones stay Normal (not MissingSeries)
+      0 * max by (service_id, service_name, node_name) (
+        pmm_managed_inventory_agents{agent_type="valkey_exporter", disabled="0"}
+      )
     for: 1m
     severity: critical
     annotations:
diff --git a/managed/data/alerting-templates/valkey_down.yml b/managed/data/alerting-templates/valkey_down.yml
index 43caa90445f..9ee1502fed3 100644
--- a/managed/data/alerting-templates/valkey_down.yml
+++ b/managed/data/alerting-templates/valkey_down.yml
@@ -3,7 +3,20 @@ templates:
   - name: pmm_valkey_down
     version: 1
     summary: Valkey down
-    expr: sum by (service_name, node_name) (redis_up) == bool 0 and on(node_name) pmm_managed_inventory_agents{agent_type="valkey_exporter", disabled="0"}
+    expr: |
+      (
+        # enabled exporters we should be watching (from inventory — always present)
+        max by (service_id, service_name, node_name) (
+          pmm_managed_inventory_agents{agent_type="valkey_exporter", disabled="0"}
+        )
+        # drop the ones that are up → leaves down + missing (value 1)
+        unless on (service_id) (max by (service_id) (redis_up) == 1)
+      )
+      or
+      # baseline 0 for every enabled service so healthy ones stay Normal (not MissingSeries)
+      0 * max by (service_id, service_name, node_name) (
+        pmm_managed_inventory_agents{agent_type="valkey_exporter", disabled="0"}
+      )
     for: 1m
     severity: critical
     annotations: