diff --git a/tests/robustness/traffic/etcd.go b/tests/robustness/traffic/etcd.go
index 582d5f1b6c1..643cd299f39 100644
--- a/tests/robustness/traffic/etcd.go
+++ b/tests/robustness/traffic/etcd.go
@@ -34,6 +34,7 @@ var (
 		keyCount:     10,
 		leaseTTL:     DefaultLeaseTTL,
 		largePutSize: 32769,
+		// Please keep the sum of weights equal 100.
 		requests: []random.ChoiceWeight[etcdRequestType]{
 			{Choice: Get, Weight: 15},
 			{Choice: List, Weight: 15},
@@ -44,15 +45,16 @@ var (
 			{Choice: PutWithLease, Weight: 5},
 			{Choice: LeaseRevoke, Weight: 5},
 			{Choice: CompareAndSet, Weight: 5},
-			{Choice: Put, Weight: 15},
+			{Choice: Put, Weight: 18},
 			{Choice: LargePut, Weight: 5},
-			{Choice: Compact, Weight: 5},
+			{Choice: Compact, Weight: 2},
 		},
 	}
 	EtcdPut Traffic = etcdTraffic{
 		keyCount:     10,
 		largePutSize: 32769,
 		leaseTTL:     DefaultLeaseTTL,
+		// Please keep the sum of weights equal 100.
 		requests: []random.ChoiceWeight[etcdRequestType]{
 			{Choice: Get, Weight: 15},
 			{Choice: List, Weight: 15},
@@ -60,8 +62,7 @@ var (
 			{Choice: StaleList, Weight: 10},
 			{Choice: MultiOpTxn, Weight: 5},
 			{Choice: LargePut, Weight: 5},
-			{Choice: Put, Weight: 35},
-			{Choice: Compact, Weight: 5},
+			{Choice: Put, Weight: 40},
 		},
 	}
 )
diff --git a/tests/robustness/traffic/kubernetes.go b/tests/robustness/traffic/kubernetes.go
index 1d5c0fb0fa1..d49f8b0d11d 100644
--- a/tests/robustness/traffic/kubernetes.go
+++ b/tests/robustness/traffic/kubernetes.go
@@ -37,11 +37,12 @@ var (
 		averageKeyCount: 10,
 		resource:        "pods",
 		namespace:       "default",
+		// Please keep the sum of weights equal 1000.
 		writeChoices: []random.ChoiceWeight[KubernetesRequestType]{
-			{Choice: KubernetesUpdate, Weight: 85},
-			{Choice: KubernetesDelete, Weight: 5},
-			{Choice: KubernetesCreate, Weight: 5},
-			{Choice: KubernetesCompact, Weight: 5},
+			{Choice: KubernetesUpdate, Weight: 875},
+			{Choice: KubernetesDelete, Weight: 50},
+			{Choice: KubernetesCreate, Weight: 50},
+			{Choice: KubernetesCompact, Weight: 25},
 		},
 	}
 )
diff --git a/tests/robustness/traffic/traffic.go b/tests/robustness/traffic/traffic.go
index 7f861096343..fb4792a1daa 100644
--- a/tests/robustness/traffic/traffic.go
+++ b/tests/robustness/traffic/traffic.go
@@ -45,7 +45,7 @@ var (
 	HighTrafficProfile = Profile{
 		MinimalQPS:                     200,
 		MaximalQPS:                     1000,
-		ClientCount:                    10,
+		ClientCount:                    8,
 		MaxNonUniqueRequestConcurrency: 3,
 	}
 )