diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/ApplyObjectMetrics.java b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/ApplyObjectMetrics.java
index 78745bb..d41dd8f 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/ApplyObjectMetrics.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/ApplyObjectMetrics.java
@@ -15,6 +15,7 @@
 package com.googlesource.gerrit.plugins.replication.pull;
 
 import com.google.gerrit.extensions.annotations.PluginName;
+import com.google.gerrit.metrics.Counter0;
 import com.google.gerrit.metrics.Description;
 import com.google.gerrit.metrics.Field;
 import com.google.gerrit.metrics.MetricMaker;
@@ -28,6 +29,8 @@
   private final Timer1<String> executionTime;
   private final Timer1<String> end2EndTime;
 
+  private final Counter0 maxApiPayloadSizeReachedCounter;
+
   @Inject
   ApplyObjectMetrics(@PluginName String pluginName, MetricMaker metricMaker) {
     Field<String> field =
@@ -53,6 +56,13 @@
                 .setCumulative()
                 .setUnit(Description.Units.MILLISECONDS),
             field);
+    maxApiPayloadSizeReachedCounter =
+        metricMaker.newCounter(
+            "apply_object_max_api_payload_reached",
+            new Description(
+                    "Number of apply object operation with payload larger than maxApiPayloadSize")
+                .setRate()
+                .setUnit("errors"));
   }
 
   /**
@@ -74,4 +84,9 @@
   public Timer1.Context<String> startEnd2End(String name) {
     return end2EndTime.start(name);
   }
+
+  /** Increment metric when ref size is larger than maxApiPayloadSize. */
+  public void incrementMaxPayloadSizeReached() {
+    maxApiPayloadSizeReachedCounter.increment();
+  }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/RevisionReader.java b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/RevisionReader.java
index db46b23..cd6a0ea 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/RevisionReader.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/RevisionReader.java
@@ -55,9 +55,13 @@
   private GitRepositoryManager gitRepositoryManager;
   private Long maxRefSize;
   private final int maxDepth;
+  private ApplyObjectMetrics metrics;
 
   @Inject
-  public RevisionReader(GitRepositoryManager gitRepositoryManager, ReplicationConfig cfg) {
+  public RevisionReader(
+      GitRepositoryManager gitRepositoryManager,
+      ReplicationConfig cfg,
+      ApplyObjectMetrics metrics) {
     this.gitRepositoryManager = gitRepositoryManager;
     this.maxRefSize =
         cfg.getConfig()
@@ -65,6 +69,7 @@
     this.maxDepth =
         cfg.getConfig()
             .getInt("replication", CONFIG_MAX_API_HISTORY_DEPTH, DEFAULT_MAX_API_HISTORY_DEPTH);
+    this.metrics = metrics;
   }
 
   public Optional<RevisionData> read(
@@ -146,6 +151,7 @@
 
       return Optional.of(new RevisionData(parentObjectIds, commitRev, treeRev, blobs));
     } catch (LargeObjectException e) {
+      metrics.incrementMaxPayloadSizeReached();
       repLog.trace(
           "Ref {} size for project {} is greater than configured '{}'",
           refName,