diff --git a/defaults/main.yml b/defaults/main.yml
index 4b2b22fe..5644f037 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -153,9 +153,9 @@ cinder_service_backup_metadata_version: 2
 
 cinder_swift_catalog_info: "object-store:swift:internalURL"
 
-# If ``cinder_osapi_volume_workers`` is unset the system will use half the number of
-# available VCPUS to compute the number of api workers to use.
-# cinder_osapi_volume_workers: 16
+## Cap the maximun number of threads / workers when a user value is unspecified.
+cinder_osapi_volume_workers_max: 16
+cinder_osapi_volume_workers: "{{ [[ansible_processor_vcpus|default(2) // 2, 1] | max, cinder_osapi_volume_workers_max] | min }}"
 
 ## Cinder iscsi
 cinder_iscsi_helper: tgtadm
diff --git a/releasenotes/notes/capping_cinder_osapi_volume_workers-db32afcf7615b05b.yaml b/releasenotes/notes/capping_cinder_osapi_volume_workers-db32afcf7615b05b.yaml
new file mode 100644
index 00000000..0f33f8e5
--- /dev/null
+++ b/releasenotes/notes/capping_cinder_osapi_volume_workers-db32afcf7615b05b.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - Capping the default value for the variable ``cinder_osapi_volume_workers``
+    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.
diff --git a/templates/cinder.conf.j2 b/templates/cinder.conf.j2
index 5207c045..51521402 100644
--- a/templates/cinder.conf.j2
+++ b/templates/cinder.conf.j2
@@ -1,8 +1,5 @@
 # {{ ansible_managed }}
 
-{% set _api_threads = ansible_processor_vcpus|default(2) // 2 %}
-{% set api_threads = _api_threads if _api_threads > 0 else 1 %}
-
 [DEFAULT]
 # Disable stderr logging
 use_stderr = False
@@ -10,7 +7,7 @@ debug = {{ debug }}
 fatal_deprecations = {{ cinder_fatal_deprecations }}
 my_ip = {{ cinder_management_address }}
 
-osapi_volume_workers = {{ cinder_osapi_volume_workers | default(api_threads) }}
+osapi_volume_workers = {{ cinder_osapi_volume_workers }}
 
 rootwrap_config = /etc/cinder/rootwrap.conf
 api_paste_config = /etc/cinder/api-paste.ini