diff --git a/manifests/init.pp b/manifests/init.pp
index 175adcb9..109cc096 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -13,6 +13,10 @@
 #   (<= 0 means forever)
 #   Defaults to $::os_service_default
 #
+# [*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:
@@ -220,6 +224,7 @@
 class aodh (
   $package_ensure                     = 'present',
   $alarm_history_time_to_live         = $::os_service_default,
+  $executor_thread_pool_size          = $::os_service_default,
   $default_transport_url              = $::os_service_default,
   $rpc_response_timeout               = $::os_service_default,
   $control_exchange                   = $::os_service_default,
@@ -315,9 +320,10 @@ class aodh (
   }
 
   oslo::messaging::default { 'aodh_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::messaging::notifications { 'aodh_config':
diff --git a/releasenotes/notes/add_executor_thread_pool_size-f39600c510541493.yaml b/releasenotes/notes/add_executor_thread_pool_size-f39600c510541493.yaml
new file mode 100644
index 00000000..8e674b4f
--- /dev/null
+++ b/releasenotes/notes/add_executor_thread_pool_size-f39600c510541493.yaml
@@ -0,0 +1,3 @@
+---
+features:
+    - Add possibility to configure the size of executor thread pool.
diff --git a/spec/classes/aodh_init_spec.rb b/spec/classes/aodh_init_spec.rb
index 953382f5..0cbc3cbb 100644
--- a/spec/classes/aodh_init_spec.rb
+++ b/spec/classes/aodh_init_spec.rb
@@ -21,6 +21,7 @@ describe 'aodh' do
       end
 
       it 'configures rabbit' do
+        is_expected.to contain_aodh_config('DEFAULT/executor_thread_pool_size').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_aodh_config('DEFAULT/transport_url').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_aodh_config('DEFAULT/rpc_response_timeout').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_aodh_config('DEFAULT/control_exchange').with_value('<SERVICE DEFAULT>')
@@ -44,6 +45,7 @@ describe 'aodh' do
     context 'with overridden parameters' do
       let :params do
         {
+          :executor_thread_pool_size          => '128',
           :default_transport_url              => 'rabbit://rabbit_user:password@localhost:5673',
           :rabbit_ha_queues                   => 'undef',
           :rabbit_heartbeat_timeout_threshold => '60',
@@ -59,6 +61,7 @@ describe 'aodh' do
       end
 
       it 'configures rabbit' do
+        is_expected.to contain_aodh_config('DEFAULT/executor_thread_pool_size').with_value('128')
         is_expected.to contain_aodh_config('DEFAULT/transport_url').with_value('rabbit://rabbit_user:password@localhost:5673')
         is_expected.to contain_aodh_config('oslo_messaging_rabbit/heartbeat_timeout_threshold').with_value('60')
         is_expected.to contain_aodh_config('oslo_messaging_rabbit/heartbeat_rate').with_value('10')