diff --git a/src/common/metrics/src/relabeled_metric.rs b/src/common/metrics/src/relabeled_metric.rs
index e7b07155c06b0..d613256628e80 100644
--- a/src/common/metrics/src/relabeled_metric.rs
+++ b/src/common/metrics/src/relabeled_metric.rs
@@ -74,6 +74,47 @@ impl<M> RelabeledMetricVec<M> {
     }
 }
 
+#[easy_ext::ext(MetricVecRelabelExt)]
+impl<M> M
+where
+    M: Sized,
+{
+    /// Equivalent to [`RelabeledMetricVec::with_metric_level`].
+    pub fn relabel(
+        self,
+        metric_level: MetricLevel,
+        relabel_threshold: MetricLevel,
+    ) -> RelabeledMetricVec<M> {
+        RelabeledMetricVec::with_metric_level(metric_level, self, relabel_threshold)
+    }
+
+    /// Equivalent to [`RelabeledMetricVec::with_metric_level_relabel_n`].
+    pub fn relabel_n(
+        self,
+        metric_level: MetricLevel,
+        relabel_threshold: MetricLevel,
+        relabel_num: usize,
+    ) -> RelabeledMetricVec<M> {
+        RelabeledMetricVec::with_metric_level_relabel_n(
+            metric_level,
+            self,
+            relabel_threshold,
+            relabel_num,
+        )
+    }
+
+    /// Equivalent to [`RelabeledMetricVec::with_metric_level_relabel_n`] with `metric_level` set to
+    /// `MetricLevel::Debug` and `relabel_num` set to 1.
+    pub fn relabel_debug_1(self, relabel_threshold: MetricLevel) -> RelabeledMetricVec<M> {
+        RelabeledMetricVec::with_metric_level_relabel_n(
+            MetricLevel::Debug,
+            self,
+            relabel_threshold,
+            1,
+        )
+    }
+}
+
 impl<T: MetricVecBuilder> RelabeledMetricVec<MetricVec<T>> {
     pub fn with_label_values(&self, vals: &[&str]) -> T::M {
         if self.metric_level > self.relabel_threshold {
@@ -89,8 +130,7 @@ impl<T: MetricVecBuilder> RelabeledMetricVec<MetricVec<T>> {
 }
 
 impl<T: MetricVecBuilder, const N: usize> RelabeledMetricVec<LabelGuardedMetricVec<T, N>> {
-    // TODO: shall we rename this to `with_guarded_label_values`?
-    pub fn with_label_values(&self, vals: &[&str; N]) -> LabelGuardedMetric<T::M, N> {
+    pub fn with_guarded_label_values(&self, vals: &[&str; N]) -> LabelGuardedMetric<T::M, N> {
         if self.metric_level > self.relabel_threshold {
             // relabel first n labels to empty string
             let mut relabeled_vals = *vals;
diff --git a/src/storage/src/monitor/local_metrics.rs b/src/storage/src/monitor/local_metrics.rs
index 81bfb86fe3c73..3b287949f2091 100644
--- a/src/storage/src/monitor/local_metrics.rs
+++ b/src/storage/src/monitor/local_metrics.rs
@@ -256,30 +256,30 @@ impl LocalStoreMetrics {
     pub fn new(metrics: &HummockStateStoreMetrics, table_id_label: &str) -> Self {
         let cache_data_block_total = metrics
             .sst_store_block_request_counts
-            .with_label_values(&[table_id_label, "data_total"])
+            .with_guarded_label_values(&[table_id_label, "data_total"])
             .local();
 
         let cache_data_block_miss = metrics
             .sst_store_block_request_counts
-            .with_label_values(&[table_id_label, "data_miss"])
+            .with_guarded_label_values(&[table_id_label, "data_miss"])
             .local();
 
         let cache_meta_block_total = metrics
             .sst_store_block_request_counts
-            .with_label_values(&[table_id_label, "meta_total"])
+            .with_guarded_label_values(&[table_id_label, "meta_total"])
             .local();
         let cache_data_prefetch_count = metrics
             .sst_store_block_request_counts
-            .with_label_values(&[table_id_label, "prefetch_count"])
+            .with_guarded_label_values(&[table_id_label, "prefetch_count"])
             .local();
         let cache_data_prefetch_block_count = metrics
             .sst_store_block_request_counts
-            .with_label_values(&[table_id_label, "prefetch_data_count"])
+            .with_guarded_label_values(&[table_id_label, "prefetch_data_count"])
             .local();
 
         let cache_meta_block_miss = metrics
             .sst_store_block_request_counts
-            .with_label_values(&[table_id_label, "meta_miss"])
+            .with_guarded_label_values(&[table_id_label, "meta_miss"])
             .local();
 
         let remote_io_time = metrics
@@ -289,22 +289,22 @@ impl LocalStoreMetrics {
 
         let processed_key_count = metrics
             .iter_scan_key_counts
-            .with_label_values(&[table_id_label, "processed"])
+            .with_guarded_label_values(&[table_id_label, "processed"])
             .local();
 
         let skip_multi_version_key_count = metrics
             .iter_scan_key_counts
-            .with_label_values(&[table_id_label, "skip_multi_version"])
+            .with_guarded_label_values(&[table_id_label, "skip_multi_version"])
             .local();
 
         let skip_delete_key_count = metrics
             .iter_scan_key_counts
-            .with_label_values(&[table_id_label, "skip_delete"])
+            .with_guarded_label_values(&[table_id_label, "skip_delete"])
             .local();
 
         let total_key_count = metrics
             .iter_scan_key_counts
-            .with_label_values(&[table_id_label, "total"])
+            .with_guarded_label_values(&[table_id_label, "total"])
             .local();
 
         let get_shared_buffer_hit_counts = metrics
@@ -477,7 +477,7 @@ macro_rules! define_bloom_filter_metrics {
             pub fn new(metrics: &HummockStateStoreMetrics, table_id_label: &str, oper_type: &str) -> Self {
                 // checks SST bloom filters
                 Self {
-                    $($x: metrics.$x.with_label_values(&[table_id_label, oper_type]).local(),)*
+                    $($x: metrics.$x.with_guarded_label_values(&[table_id_label, oper_type]).local(),)*
                 }
             }
 
diff --git a/src/storage/src/monitor/monitored_storage_metrics.rs b/src/storage/src/monitor/monitored_storage_metrics.rs
index 01419586f2eea..5813c20b4e9ef 100644
--- a/src/storage/src/monitor/monitored_storage_metrics.rs
+++ b/src/storage/src/monitor/monitored_storage_metrics.rs
@@ -287,27 +287,27 @@ impl MonitoredStorageMetrics {
     ) -> LocalIterMetricsInner {
         let iter_init_duration = self
             .iter_init_duration
-            .with_label_values(&[table_label, iter_type])
+            .with_guarded_label_values(&[table_label, iter_type])
             .local();
         let iter_counts = self
             .iter_counts
-            .with_label_values(&[table_label, iter_type])
+            .with_guarded_label_values(&[table_label, iter_type])
             .local();
         let iter_scan_duration = self
             .iter_scan_duration
-            .with_label_values(&[table_label, iter_type])
+            .with_guarded_label_values(&[table_label, iter_type])
             .local();
         let iter_item = self
             .iter_item
-            .with_label_values(&[table_label, iter_type])
+            .with_guarded_label_values(&[table_label, iter_type])
             .local();
         let iter_size = self
             .iter_size
-            .with_label_values(&[table_label, iter_type])
+            .with_guarded_label_values(&[table_label, iter_type])
             .local();
         let iter_in_progress_counts = self
             .iter_in_progress_counts
-            .with_label_values(&[table_label, iter_type]);
+            .with_guarded_label_values(&[table_label, iter_type]);
 
         LocalIterMetricsInner {
             iter_init_duration,
@@ -343,11 +343,17 @@ impl MonitoredStorageMetrics {
     }
 
     fn local_get_metrics(&self, table_label: &str) -> LocalGetMetrics {
-        let get_duration = self.get_duration.with_label_values(&[table_label]).local();
-        let get_key_size = self.get_key_size.with_label_values(&[table_label]).local();
+        let get_duration = self
+            .get_duration
+            .with_guarded_label_values(&[table_label])
+            .local();
+        let get_key_size = self
+            .get_key_size
+            .with_guarded_label_values(&[table_label])
+            .local();
         let get_value_size = self
             .get_value_size
-            .with_label_values(&[table_label])
+            .with_guarded_label_values(&[table_label])
             .local();
 
         LocalGetMetrics {
diff --git a/src/stream/src/executor/barrier_align.rs b/src/stream/src/executor/barrier_align.rs
index a29bf91bb6660..e5b1e18836957 100644
--- a/src/stream/src/executor/barrier_align.rs
+++ b/src/stream/src/executor/barrier_align.rs
@@ -50,13 +50,13 @@ pub async fn barrier_align(
 ) {
     let actor_id = actor_id.to_string();
     let fragment_id = fragment_id.to_string();
-    let left_barrier_align_duration = metrics.barrier_align_duration.with_label_values(&[
+    let left_barrier_align_duration = metrics.barrier_align_duration.with_guarded_label_values(&[
         &actor_id,
         &fragment_id,
         "left",
         executor_name,
     ]);
-    let right_barrier_align_duration = metrics.barrier_align_duration.with_label_values(&[
+    let right_barrier_align_duration = metrics.barrier_align_duration.with_guarded_label_values(&[
         &actor_id,
         &fragment_id,
         "right",
diff --git a/src/stream/src/executor/dispatch.rs b/src/stream/src/executor/dispatch.rs
index 771cf8fc5b4a0..82d11db49513b 100644
--- a/src/stream/src/executor/dispatch.rs
+++ b/src/stream/src/executor/dispatch.rs
@@ -92,7 +92,7 @@ impl DispatchExecutorMetrics {
             actor_output_buffer_blocking_duration_ns: self
                 .metrics
                 .actor_output_buffer_blocking_duration_ns
-                .with_label_values(&[
+                .with_guarded_label_values(&[
                     &self.actor_id_str,
                     &self.fragment_id_str,
                     dispatcher.dispatcher_id_str(),
diff --git a/src/stream/src/executor/hash_join.rs b/src/stream/src/executor/hash_join.rs
index d12117d74e0ab..e1a1b177bcfcc 100644
--- a/src/stream/src/executor/hash_join.rs
+++ b/src/stream/src/executor/hash_join.rs
@@ -810,7 +810,7 @@ impl<K: HashKey, S: StateStore, const T: JoinTypePrimitive> HashJoinExecutor<K,
         let join_matched_join_keys = ctx
             .streaming_metrics
             .join_matched_join_keys
-            .with_label_values(&[
+            .with_guarded_label_values(&[
                 &ctx.id.to_string(),
                 &ctx.fragment_id.to_string(),
                 &side_update.ht.table_id().to_string(),
diff --git a/src/stream/src/executor/merge.rs b/src/stream/src/executor/merge.rs
index b58ea1f44c513..393b800895151 100644
--- a/src/stream/src/executor/merge.rs
+++ b/src/stream/src/executor/merge.rs
@@ -111,7 +111,7 @@ impl MergeExecutor {
             Some(
                 self.metrics
                     .merge_barrier_align_duration
-                    .with_label_values(&[
+                    .with_guarded_label_values(&[
                         &self.actor_context.id.to_string(),
                         &self.actor_context.fragment_id.to_string(),
                     ]),
diff --git a/src/stream/src/executor/monitor/streaming_stats.rs b/src/stream/src/executor/monitor/streaming_stats.rs
index 39ef1fec5c516..32aa28e8242a9 100644
--- a/src/stream/src/executor/monitor/streaming_stats.rs
+++ b/src/stream/src/executor/monitor/streaming_stats.rs
@@ -23,7 +23,7 @@ use risingwave_common::catalog::TableId;
 use risingwave_common::config::MetricLevel;
 use risingwave_common::metrics::{
     LabelGuardedGauge, LabelGuardedGaugeVec, LabelGuardedHistogramVec, LabelGuardedIntCounter,
-    LabelGuardedIntCounterVec, LabelGuardedIntGauge, LabelGuardedIntGaugeVec,
+    LabelGuardedIntCounterVec, LabelGuardedIntGauge, LabelGuardedIntGaugeVec, MetricVecRelabelExt,
     RelabeledGuardedHistogramVec, RelabeledGuardedIntCounterVec,
 };
 use risingwave_common::monitor::GLOBAL_METRICS_REGISTRY;
@@ -288,14 +288,9 @@ impl StreamingMetrics {
                 &["actor_id", "fragment_id", "downstream_fragment_id"],
                 registry
             )
-            .unwrap();
-        let actor_output_buffer_blocking_duration_ns =
-            RelabeledGuardedIntCounterVec::with_metric_level_relabel_n(
-                MetricLevel::Debug,
-                actor_output_buffer_blocking_duration_ns,
-                level,
-                1, // mask the first label `actor_id` if the level is less verbose than `Debug`
-            );
+            .unwrap()
+            // mask the first label `actor_id` if the level is less verbose than `Debug`
+            .relabel_debug_1(level);
 
         let actor_input_buffer_blocking_duration_ns =
             register_guarded_int_counter_vec_with_registry!(
@@ -436,14 +431,8 @@ impl StreamingMetrics {
             &["actor_id", "fragment_id"],
             registry
         )
-        .unwrap();
-        let merge_barrier_align_duration =
-            RelabeledGuardedHistogramVec::with_metric_level_relabel_n(
-                MetricLevel::Debug,
-                merge_barrier_align_duration,
-                level,
-                1,
-            );
+        .unwrap()
+        .relabel_debug_1(level);
 
         let join_lookup_miss_count = register_guarded_int_counter_vec_with_registry!(
             "stream_join_lookup_miss_count",
@@ -491,13 +480,8 @@ impl StreamingMetrics {
             &["actor_id", "fragment_id", "wait_side", "executor"],
             registry
         )
-        .unwrap();
-        let barrier_align_duration = RelabeledGuardedIntCounterVec::with_metric_level_relabel_n(
-            MetricLevel::Debug,
-            barrier_align_duration,
-            level,
-            1,
-        );
+        .unwrap()
+        .relabel_debug_1(level);
 
         let join_cached_entry_count = register_guarded_int_gauge_vec_with_registry!(
             "stream_join_cached_entry_count",
@@ -518,13 +502,8 @@ impl StreamingMetrics {
             &["actor_id", "fragment_id", "table_id"],
             registry
         )
-        .unwrap();
-        let join_matched_join_keys = RelabeledGuardedHistogramVec::with_metric_level_relabel_n(
-            MetricLevel::Debug,
-            join_matched_join_keys,
-            level,
-            1,
-        );
+        .unwrap()
+        .relabel_debug_1(level);
 
         let agg_lookup_miss_count = register_guarded_int_counter_vec_with_registry!(
             "stream_agg_lookup_miss_count",
diff --git a/src/stream/src/executor/union.rs b/src/stream/src/executor/union.rs
index 46acefb61d44f..9183d7bc26fd3 100644
--- a/src/stream/src/executor/union.rs
+++ b/src/stream/src/executor/union.rs
@@ -106,7 +106,7 @@ async fn merge(
     let mut watermark_buffers = BTreeMap::<usize, BufferedWatermarks<usize>>::new();
 
     let mut start_time = Instant::now();
-    let barrier_align = metrics.barrier_align_duration.with_label_values(&[
+    let barrier_align = metrics.barrier_align_duration.with_guarded_label_values(&[
         &actor_id.to_string(),
         &fragment_id.to_string(),
         "",