diff --git a/stacks/blog/main.tf b/stacks/blog/main.tf
index 237e56b3..ac9a88d7 100644
--- a/stacks/blog/main.tf
+++ b/stacks/blog/main.tf
@@ -30,7 +30,7 @@ resource "kubernetes_deployment" "blog" {
     }
   }
   spec {
-    replicas = 3
+    replicas = 1
     selector {
       match_labels = {
         run = "blog"
diff --git a/stacks/dashy/main.tf b/stacks/dashy/main.tf
index 1fe9e142..77295cfc 100644
--- a/stacks/dashy/main.tf
+++ b/stacks/dashy/main.tf
@@ -48,7 +48,8 @@ resource "kubernetes_deployment" "dashy" {
     }
   }
   spec {
-    replicas = 1
+    # Disabled: reduce cluster memory pressure (2026-03-14 OOM incident)
+    replicas = 0
     selector {
       match_labels = {
         app = "dashy"
diff --git a/stacks/echo/main.tf b/stacks/echo/main.tf
index 2e408aba..0e950b21 100644
--- a/stacks/echo/main.tf
+++ b/stacks/echo/main.tf
@@ -30,7 +30,7 @@ resource "kubernetes_deployment" "echo" {
     }
   }
   spec {
-    replicas = 5
+    replicas = 1
     selector {
       match_labels = {
         app = "echo"
diff --git a/stacks/networking-toolbox/main.tf b/stacks/networking-toolbox/main.tf
index 899f1220..af7e5f7c 100644
--- a/stacks/networking-toolbox/main.tf
+++ b/stacks/networking-toolbox/main.tf
@@ -30,7 +30,7 @@ resource "kubernetes_deployment" "networking-toolbox" {
     }
   }
   spec {
-    replicas = 3
+    replicas = 1
     selector {
       match_labels = {
         app = "networking-toolbox"
diff --git a/stacks/osm_routing/main.tf b/stacks/osm_routing/main.tf
index d42af6ec..60bc03d5 100644
--- a/stacks/osm_routing/main.tf
+++ b/stacks/osm_routing/main.tf
@@ -59,7 +59,8 @@ resource "kubernetes_deployment" "osrm-foot" {
     }
   }
   spec {
-    replicas = 1
+    # Disabled: reduce cluster memory pressure (2026-03-14 OOM incident)
+    replicas = 0
     strategy {
       type = "Recreate"
     }
@@ -139,7 +140,8 @@ resource "kubernetes_deployment" "osrm-bicycle" {
     }
   }
   spec {
-    replicas = 1
+    # Disabled: reduce cluster memory pressure (2026-03-14 OOM incident)
+    replicas = 0
     strategy {
       type = "Recreate"
     }
@@ -219,7 +221,8 @@ resource "kubernetes_deployment" "otp" {
     }
   }
   spec {
-    replicas = 1
+    # Disabled: reduce cluster memory pressure (2026-03-14 OOM incident)
+    replicas = 0
     strategy {
       type = "Recreate"
     }
diff --git a/stacks/travel_blog/main.tf b/stacks/travel_blog/main.tf
index 31daa076..18f386bc 100644
--- a/stacks/travel_blog/main.tf
+++ b/stacks/travel_blog/main.tf
@@ -30,7 +30,7 @@ resource "kubernetes_deployment" "blog" {
     }
   }
   spec {
-    replicas = 3
+    replicas = 1
     selector {
       match_labels = {
         app = "travel-blog"