diff --git a/changelogs/unreleased/bjk-4246_alert_sensitivity.yml b/changelogs/unreleased/bjk-4246_alert_sensitivity.yml
new file mode 100644
index 0000000000000000000000000000000000000000..c3e7924beb540813713c38f14ad99abda13678e7_Y2hhbmdlbG9ncy91bnJlbGVhc2VkL2Jqay00MjQ2X2FsZXJ0X3NlbnNpdGl2aXR5LnltbA==
--- /dev/null
+++ b/changelogs/unreleased/bjk-4246_alert_sensitivity.yml
@@ -0,0 +1,5 @@
+---
+title: Update WorkhorseHighErrorRate alert
+merge_request: 3183
+author:
+type: fixed
diff --git a/files/gitlab-cookbooks/gitlab/templates/default/prometheus/rules/gitlab.rules.v1 b/files/gitlab-cookbooks/gitlab/templates/default/prometheus/rules/gitlab.rules.v1
index 622ee2ca3703e7445d14080cc017f9cf6dad4a2a_ZmlsZXMvZ2l0bGFiLWNvb2tib29rcy9naXRsYWIvdGVtcGxhdGVzL2RlZmF1bHQvcHJvbWV0aGV1cy9ydWxlcy9naXRsYWIucnVsZXMudjE=..c3e7924beb540813713c38f14ad99abda13678e7_ZmlsZXMvZ2l0bGFiLWNvb2tib29rcy9naXRsYWIvdGVtcGxhdGVzL2RlZmF1bHQvcHJvbWV0aGV1cy9ydWxlcy9naXRsYWIucnVsZXMudjE= 100644
--- a/files/gitlab-cookbooks/gitlab/templates/default/prometheus/rules/gitlab.rules.v1
+++ b/files/gitlab-cookbooks/gitlab/templates/default/prometheus/rules/gitlab.rules.v1
@@ -73,4 +73,5 @@
 
 job_route_method_code:gitlab_workhorse_http_request_duration_seconds_count:rate5m = sum by (job, route, method, code) (rate(gitlab_workhorse_http_request_duration_seconds_count[5m]))
 
+# Low-traffic - < 10 QPS (600 RPM)
 ALERT WorkhorseHighErrorRate
@@ -76,5 +77,12 @@
 ALERT WorkhorseHighErrorRate
-  IF sum without (job, code) (job_route_method_code:gitlab_workhorse_http_request_duration_seconds_count:rate5m{code=~"5.."}) / sum without (job,code) (job_route_method_code:gitlab_workhorse_http_request_duration_seconds_count:rate5m) * 100 > 1
+  IF (
+       sum without (job, code) (
+         job_route_method_code:gitlab_workhorse_http_request_duration_seconds_count:rate5m{code=~"5.."}
+       ) /
+       sum without (job,code) (
+         job_route_method_code:gitlab_workhorse_http_request_duration_seconds_count:rate5m
+       ) < 10
+     ) * 100 > 50
   FOR 60m
   ANNOTATIONS {
     summary = 'Workhorse has high error rates',
@@ -78,5 +86,5 @@
   FOR 60m
   ANNOTATIONS {
     summary = 'Workhorse has high error rates',
-    description = 'Workhorse route {{ $labels.route }} method {{ $labels.method }} has more than 1% errors ({{ $value | printf "%.1f" }}%) for the last 60 minutes.',
+    description = 'Workhorse route {{ $labels.route }} method {{ $labels.method }} has more than 50% errors ({{ $value | printf "%.1f" }}%) for the last 60 minutes.',
   }
@@ -82,1 +90,17 @@
   }
+
+# High-traffic - >= 10 QPS (600 RPM)
+ALERT WorkhorseHighErrorRate
+  IF (
+       sum without (job, code) (
+         job_route_method_code:gitlab_workhorse_http_request_duration_seconds_count:rate5m{code=~"5.."}
+       ) /
+       sum without (job,code) (
+         job_route_method_code:gitlab_workhorse_http_request_duration_seconds_count:rate5m
+       ) >= 10
+     ) * 100 > 10
+  FOR 60m
+  ANNOTATIONS {
+    summary = 'Workhorse has high error rates',
+    description = 'Workhorse route {{ $labels.route }} method {{ $labels.method }} has more than 10% errors ({{ $value | printf "%.1f" }}%) for the last 60 minutes.',
+  }
diff --git a/files/gitlab-cookbooks/gitlab/templates/default/prometheus/rules/gitlab.rules.v2 b/files/gitlab-cookbooks/gitlab/templates/default/prometheus/rules/gitlab.rules.v2
index 622ee2ca3703e7445d14080cc017f9cf6dad4a2a_ZmlsZXMvZ2l0bGFiLWNvb2tib29rcy9naXRsYWIvdGVtcGxhdGVzL2RlZmF1bHQvcHJvbWV0aGV1cy9ydWxlcy9naXRsYWIucnVsZXMudjI=..c3e7924beb540813713c38f14ad99abda13678e7_ZmlsZXMvZ2l0bGFiLWNvb2tib29rcy9naXRsYWIvdGVtcGxhdGVzL2RlZmF1bHQvcHJvbWV0aGV1cy9ydWxlcy9naXRsYWIucnVsZXMudjI= 100644
--- a/files/gitlab-cookbooks/gitlab/templates/default/prometheus/rules/gitlab.rules.v2
+++ b/files/gitlab-cookbooks/gitlab/templates/default/prometheus/rules/gitlab.rules.v2
@@ -78,5 +78,6 @@
     annotations:
       summary: Postgres database has queries canceled due to deadlocks
       description: Postgres database {{ $labels.instance }} had {{ $value | printf "%d" }} queries canceled due to deadlocks in the last 5 minutes.
+  # Low-traffic - < 10 QPS (600 RPM)
   - alert: WorkhorseHighErrorRate
     expr: >
@@ -81,10 +82,12 @@
   - alert: WorkhorseHighErrorRate
     expr: >
-      sum without (job, code) (
-        job_route_method_code:gitlab_workhorse_http_request_duration_seconds_count:rate5m{code=~"5.."}
-      ) /
-      sum without (job,code) (
-        job_route_method_code:gitlab_workhorse_http_request_duration_seconds_count:rate5m
-      ) * 100 > 1
+      (
+        sum without (job, code) (
+          job_route_method_code:gitlab_workhorse_http_request_duration_seconds_count:rate5m{code=~"5.."}
+        ) /
+        sum without (job,code) (
+          job_route_method_code:gitlab_workhorse_http_request_duration_seconds_count:rate5m
+        ) < 10
+      ) * 100 > 50
     annotations:
       summary: Workhorse has high error rates
@@ -89,3 +92,17 @@
     annotations:
       summary: Workhorse has high error rates
-      description: Workhorse route {{ $labels.route }} method {{ $labels.method }} has more than 1% errors ({{ $value | printf "%.1f" }}%) for the last 60 minutes.
+      description: Workhorse route {{ $labels.route }} method {{ $labels.method }} has more than 50% errors ({{ $value | printf "%.1f" }}%) for the last 60 minutes.
+  # High-traffic - >= 10 QPS (600 RPM)
+  - alert: WorkhorseHighErrorRate
+    expr: >
+      (
+        sum without (job, code) (
+          job_route_method_code:gitlab_workhorse_http_request_duration_seconds_count:rate5m{code=~"5.."}
+        ) /
+        sum without (job,code) (
+          job_route_method_code:gitlab_workhorse_http_request_duration_seconds_count:rate5m
+        ) > 10
+      ) * 100 > 10
+    annotations:
+      summary: Workhorse has high error rates
+      description: Workhorse route {{ $labels.route }} method {{ $labels.method }} has more than 10% errors ({{ $value | printf "%.1f" }}%) for the last 60 minutes.