diff --git a/middleware/php-fpm/README.md b/middleware/php-fpm/README.md
index 85b6e3e..49d63eb 100644
--- a/middleware/php-fpm/README.md
+++ b/middleware/php-fpm/README.md
@@ -30,6 +30,7 @@ Inputs
 | filter_tags_custom | Tags used for custom filtering when filter_tags_use_defaults is false | string | `*` | no |
 | filter_tags_use_defaults | Use default filter tags convention | string | `true` | no |
 | message | Message sent when an alert is triggered | string | - | yes |
+| php_fpm_busy_aggregator | Monitor aggregator for PHP FPM busy worker [available values: min, max, sum or avg] | string | `avg` | no |
 | php_fpm_busy_message | Custom message for PHP FPM busy worker monitor | string | `` | no |
 | php_fpm_busy_silenced | Groups to mute for PHP FPM busy worker monitor | map | `<map>` | no |
 | php_fpm_busy_threshold_critical | php fpm busy critical threshold | string | `0.9` | no |
diff --git a/middleware/php-fpm/inputs.tf b/middleware/php-fpm/inputs.tf
index b88d5f5..d9946c0 100644
--- a/middleware/php-fpm/inputs.tf
+++ b/middleware/php-fpm/inputs.tf
@@ -38,6 +38,12 @@ variable "php_fpm_busy_message" {
   default     = ""
 }
 
+variable "php_fpm_busy_aggregator" {
+  description = "Monitor aggregator for PHP FPM busy worker [available values: min, max, sum or avg]"
+  type        = "string"
+  default     = "avg"
+}
+
 variable "php_fpm_busy_timeframe" {
   description = "Monitor timeframe for PHP FPM busy worker [available values: `last_#m` (1, 5, 10, 15, or 30), `last_#h` (1, 2, or 4), or `last_1d`]"
   type        = "string"
diff --git a/middleware/php-fpm/monitors-fpm.tf b/middleware/php-fpm/monitors-fpm.tf
index f0d9e90..51e8ec0 100644
--- a/middleware/php-fpm/monitors-fpm.tf
+++ b/middleware/php-fpm/monitors-fpm.tf
@@ -13,10 +13,10 @@ resource "datadog_monitor" "datadog_php_fpm_connect_idle" {
   type = "metric alert"
 
   query = <<EOF
-    avg(${var.php_fpm_busy_timeframe}): (
-      avg:php_fpm.processes.active{${data.template_file.filter.rendered}} by {region, host} /
-      ( avg:php_fpm.processes.idle{${data.template_file.filter.rendered}} by {region, host} +
-       avg:php_fpm.processes.active{${data.template_file.filter.rendered}} by {region, host} )
+    ${var.php_fpm_busy_aggregator}(${var.php_fpm_busy_timeframe}): (
+      ${var.php_fpm_busy_aggregator}:php_fpm.processes.active{${data.template_file.filter.rendered}} by {region, host} /
+      ( ${var.php_fpm_busy_aggregator}:php_fpm.processes.idle{${data.template_file.filter.rendered}} by {region, host} +
+       ${var.php_fpm_busy_aggregator}:php_fpm.processes.active{${data.template_file.filter.rendered}} by {region, host} )
     ) > ${var.php_fpm_busy_threshold_critical}
   EOF