diff --git a/manifests/init.pp b/manifests/init.pp
index ea55381e..2ef2e6f3 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -25,6 +25,10 @@
 #   (Optional) ensure state for package.
 #   Defaults to 'present'.
 #
+# [*executor_thread_pool_size*]
+#   (optional) Size of executor thread pool when executor is threading or eventlet.
+#   Defaults to $::os_service_default.
+#
 # [*default_transport_url*]
 #   (optional) A URL representing the messaging driver to use and its full
 #   configuration. Transport URLs take the form:
@@ -221,6 +225,7 @@ class ceilometer(
   $notification_topics                = ['notifications'],
   $notification_driver                = $::os_service_default,
   $package_ensure                     = 'present',
+  $executor_thread_pool_size          = $::os_service_default,
   $default_transport_url              = $::os_service_default,
   $rpc_response_timeout               = $::os_service_default,
   $control_exchange                   = $::os_service_default,
@@ -345,9 +350,10 @@ class ceilometer(
   }
 
   oslo::messaging::default { 'ceilometer_config':
-    transport_url        => $default_transport_url,
-    rpc_response_timeout => $rpc_response_timeout,
-    control_exchange     => $control_exchange,
+    executor_thread_pool_size => $executor_thread_pool_size,
+    transport_url             => $default_transport_url,
+    rpc_response_timeout      => $rpc_response_timeout,
+    control_exchange          => $control_exchange,
   }
 
   oslo::cache { 'ceilometer_config':
diff --git a/releasenotes/notes/add_executor_thread_pool_size-6f4ffd7ffd0f117a.yaml b/releasenotes/notes/add_executor_thread_pool_size-6f4ffd7ffd0f117a.yaml
new file mode 100644
index 00000000..8e674b4f
--- /dev/null
+++ b/releasenotes/notes/add_executor_thread_pool_size-6f4ffd7ffd0f117a.yaml
@@ -0,0 +1,3 @@
+---
+features:
+    - Add possibility to configure the size of executor thread pool.
diff --git a/spec/classes/ceilometer_init_spec.rb b/spec/classes/ceilometer_init_spec.rb
index 8d532acc..1600b5e7 100644
--- a/spec/classes/ceilometer_init_spec.rb
+++ b/spec/classes/ceilometer_init_spec.rb
@@ -105,6 +105,7 @@ describe 'ceilometer' do
     end
 
     it 'configures default transport_url' do
+      is_expected.to contain_ceilometer_config('DEFAULT/executor_thread_pool_size').with_value('<SERVICE DEFAULT>')
       is_expected.to contain_ceilometer_config('DEFAULT/transport_url').with_value('<SERVICE DEFAULT>')
       is_expected.to contain_ceilometer_config('DEFAULT/rpc_response_timeout').with_value('<SERVICE DEFAULT>')
       is_expected.to contain_ceilometer_config('DEFAULT/control_exchange').with_value('<SERVICE DEFAULT>')
@@ -133,13 +134,15 @@ describe 'ceilometer' do
     context 'with overridden transport_url parameter' do
       before {
         params.merge!(
-          :default_transport_url => 'rabbit://rabbit_user:password@localhost:5673',
-          :rpc_response_timeout  => '120',
-          :control_exchange      => 'ceilometer',
+          :executor_thread_pool_size => '128',
+          :default_transport_url     => 'rabbit://rabbit_user:password@localhost:5673',
+          :rpc_response_timeout      => '120',
+          :control_exchange          => 'ceilometer',
         )
       }
 
       it 'configures transport_url' do
+        is_expected.to contain_ceilometer_config('DEFAULT/executor_thread_pool_size').with_value('128')
         is_expected.to contain_ceilometer_config('DEFAULT/transport_url').with_value('rabbit://rabbit_user:password@localhost:5673')
         is_expected.to contain_ceilometer_config('DEFAULT/rpc_response_timeout').with_value('120')
         is_expected.to contain_ceilometer_config('DEFAULT/control_exchange').with_value('ceilometer')