diff --git a/defaults/main.yml b/defaults/main.yml
index 5f1b945d..d2dcce50 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -182,7 +182,9 @@ keystone_apache_custom_log_format: combined
 keystone_apache_servertokens: "Prod"
 keystone_apache_serversignature: "Off"
 keystone_wsgi_threads: 1
-keystone_wsgi_processes: "{{ (ansible_processor_vcpus | int > 0) | ternary (ansible_processor_vcpus, 1) * 2}}"
+## Cap the maximun number of processes when a user value is unspecified.
+keystone_wsgi_processes_max: 16
+keystone_wsgi_processes: "{{ [[ansible_processor_vcpus|default(1), 1] | max * 2, keystone_wsgi_processes_max] | min }}"
 
 ## Apache MPM tunables
 keystone_httpd_mpm_backend: event
diff --git a/releasenotes/notes/capping_keystone_workers-e284a47fc4dcea38.yaml b/releasenotes/notes/capping_keystone_workers-e284a47fc4dcea38.yaml
new file mode 100644
index 00000000..b3b84778
--- /dev/null
+++ b/releasenotes/notes/capping_keystone_workers-e284a47fc4dcea38.yaml
@@ -0,0 +1,6 @@
+---
+features:
+  - Capping the default value for the variable ``keystone_wsgi_processes``
+    to 16 when the user doesn't configure this variable. Default value is
+    half the number of vCPUs available on the machine with a capping value
+    of 16.