diff --git a/deployment/database/mysql-base.yaml b/deployment/database/mysql-base.yaml
index 0de5cd0625..f49740e05a 100644
--- a/deployment/database/mysql-base.yaml
+++ b/deployment/database/mysql-base.yaml
@@ -72,12 +72,18 @@ parameters:
     default: ''
     description: Override the private key size used when creating the
                  certificate for this service
+  MysqlInnodbBufferPoolSize:
+    type: string
+    description: Buffer pool size for MySQL database; this needs to be larger
+                 for at-scale deployments
+    default: ''
 
 
 conditions:
 
   internal_tls_enabled: {equals: [{get_param: EnableInternalTLS}, true]}
   key_size_override_unset: {equals: [{get_param: MysqlCertificateKeySize}, '']}
+  innodb_buffer_pool_size: {not: {equals: [{get_param: MysqlInnodbBufferPoolSize}, '']}}
 
 outputs:
   container_config_scripts:
@@ -180,6 +186,11 @@ outputs:
                     - {get_param: CertificateKeySize}
                     - {get_param: MysqlCertificateKeySize}
             - {}
+          -
+            if:
+            - innodb_buffer_pool_size
+            - innodb_buffer_pool_size: {get_param: MysqlInodbBufferPoolSize}
+            - {}
       step_config: |
         include ::tripleo::profile::base::database::mysql
       metadata_settings:
diff --git a/releasenotes/notes/innodb-tuning-param-e71d2fd727c450ec.yaml b/releasenotes/notes/innodb-tuning-param-e71d2fd727c450ec.yaml
new file mode 100644
index 0000000000..ac26fd2eac
--- /dev/null
+++ b/releasenotes/notes/innodb-tuning-param-e71d2fd727c450ec.yaml
@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    The MariaDB tuning parameter for Innodb_buffer_pool_size can now be set via
+    a new TripleO Heat Template parameter 'MysqlInnodbBufferPoolSize'.
+    By default this is undefined.