diff --git a/core/trino-main/src/main/java/io/trino/execution/scheduler/TaskDescriptorStorage.java b/core/trino-main/src/main/java/io/trino/execution/scheduler/TaskDescriptorStorage.java
index ee543f0b3946..d00036326ac7 100644
--- a/core/trino-main/src/main/java/io/trino/execution/scheduler/TaskDescriptorStorage.java
+++ b/core/trino-main/src/main/java/io/trino/execution/scheduler/TaskDescriptorStorage.java
@@ -18,6 +18,7 @@
 import com.google.common.math.Stats;
 import com.google.errorprone.annotations.concurrent.GuardedBy;
 import com.google.inject.Inject;
+import io.airlift.json.JsonCodec;
 import io.airlift.log.Logger;
 import io.airlift.units.DataSize;
 import io.trino.annotation.NotThreadSafe;
@@ -32,6 +33,7 @@
 import java.util.Collection;
 import java.util.Comparator;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.NoSuchElementException;
 import java.util.Objects;
@@ -54,6 +56,7 @@ public class TaskDescriptorStorage
     private static final Logger log = Logger.get(TaskDescriptorStorage.class);
 
     private final long maxMemoryInBytes;
+    private final JsonCodec<Split> splitJsonCodec;
 
     @GuardedBy("this")
     private final Map<QueryId, TaskDescriptors> storages = new HashMap<>();
@@ -61,14 +64,17 @@ public class TaskDescriptorStorage
     private long reservedBytes;
 
     @Inject
-    public TaskDescriptorStorage(QueryManagerConfig config)
+    public TaskDescriptorStorage(
+            QueryManagerConfig config,
+            JsonCodec<Split> splitJsonCodec)
     {
-        this(config.getFaultTolerantExecutionTaskDescriptorStorageMaxMemory());
+        this(config.getFaultTolerantExecutionTaskDescriptorStorageMaxMemory(), splitJsonCodec);
     }
 
-    public TaskDescriptorStorage(DataSize maxMemory)
+    public TaskDescriptorStorage(DataSize maxMemory, JsonCodec<Split> splitJsonCodec)
     {
         this.maxMemoryInBytes = maxMemory.toBytes();
+        this.splitJsonCodec = requireNonNull(splitJsonCodec, "splitJsonCodec is null");
     }
 
     /**
@@ -189,7 +195,7 @@ public synchronized long getReservedBytes()
     }
 
     @NotThreadSafe
-    private static class TaskDescriptors
+    private class TaskDescriptors
     {
         private final Map<TaskDescriptorKey, TaskDescriptor> descriptors = new HashMap<>();
         private long reservedBytes;
@@ -242,7 +248,14 @@ private String getDebugInfo()
                             Map.Entry::getKey,
                             entry -> getDebugInfo(entry.getValue())));
 
-            return String.valueOf(debugInfoByStageId);
+            List<String> biggestSplits = descriptorsByStageId.entries().stream()
+                    .flatMap(entry -> entry.getValue().getSplits().entries().stream().map(splitEntry -> Map.entry("%s/%s".formatted(entry.getKey(), splitEntry.getKey()), splitEntry.getValue())))
+                    .sorted(Comparator.<Map.Entry<String, Split>>comparingLong(entry -> entry.getValue().getRetainedSizeInBytes()).reversed())
+                    .limit(3)
+                    .map(entry -> "{nodeId=%s, size=%s, split=%s}".formatted(entry.getKey(), entry.getValue().getRetainedSizeInBytes(), splitJsonCodec.toJson(entry.getValue())))
+                    .toList();
+
+            return "stagesInfo=%s; biggestSplits=%s".formatted(debugInfoByStageId, biggestSplits);
         }
 
         private String getDebugInfo(Collection<TaskDescriptor> taskDescriptors)
diff --git a/core/trino-main/src/main/java/io/trino/server/CoordinatorModule.java b/core/trino-main/src/main/java/io/trino/server/CoordinatorModule.java
index e705934c8b8b..4016c6fdf6af 100644
--- a/core/trino-main/src/main/java/io/trino/server/CoordinatorModule.java
+++ b/core/trino-main/src/main/java/io/trino/server/CoordinatorModule.java
@@ -87,6 +87,7 @@
 import io.trino.memory.TotalReservationLowMemoryKiller;
 import io.trino.memory.TotalReservationOnBlockedNodesQueryLowMemoryKiller;
 import io.trino.memory.TotalReservationOnBlockedNodesTaskLowMemoryKiller;
+import io.trino.metadata.Split;
 import io.trino.operator.ForScheduler;
 import io.trino.operator.OperatorStats;
 import io.trino.server.protocol.ExecutingStatementResource;
@@ -307,6 +308,7 @@ protected void setup(Binder binder)
 
         binder.bind(EventDrivenTaskSourceFactory.class).in(Scopes.SINGLETON);
         binder.bind(TaskDescriptorStorage.class).in(Scopes.SINGLETON);
+        jsonCodecBinder(binder).bindJsonCodec(Split.class);
         newExporter(binder).export(TaskDescriptorStorage.class).withGeneratedName();
 
         binder.bind(TaskExecutionStats.class).in(Scopes.SINGLETON);
diff --git a/core/trino-main/src/test/java/io/trino/execution/scheduler/TestTaskDescriptorStorage.java b/core/trino-main/src/test/java/io/trino/execution/scheduler/TestTaskDescriptorStorage.java
index 5d5018bfa6c7..93658b076537 100644
--- a/core/trino-main/src/test/java/io/trino/execution/scheduler/TestTaskDescriptorStorage.java
+++ b/core/trino-main/src/test/java/io/trino/execution/scheduler/TestTaskDescriptorStorage.java
@@ -30,6 +30,7 @@
 
 import java.util.Optional;
 
+import static io.airlift.json.JsonCodec.jsonCodec;
 import static io.airlift.units.DataSize.Unit.KILOBYTE;
 import static io.trino.operator.ExchangeOperator.REMOTE_CATALOG_HANDLE;
 import static io.trino.spi.StandardErrorCode.EXCEEDED_TASK_DESCRIPTOR_STORAGE_CAPACITY;
@@ -51,7 +52,7 @@ public class TestTaskDescriptorStorage
     @Test
     public void testHappyPath()
     {
-        TaskDescriptorStorage manager = new TaskDescriptorStorage(DataSize.of(15, KILOBYTE));
+        TaskDescriptorStorage manager = new TaskDescriptorStorage(DataSize.of(15, KILOBYTE), jsonCodec(Split.class));
         manager.initialize(QUERY_1);
         manager.initialize(QUERY_2);
 
@@ -101,7 +102,7 @@ public void testHappyPath()
     @Test
     public void testDestroy()
     {
-        TaskDescriptorStorage manager = new TaskDescriptorStorage(DataSize.of(5, KILOBYTE));
+        TaskDescriptorStorage manager = new TaskDescriptorStorage(DataSize.of(5, KILOBYTE), jsonCodec(Split.class));
         manager.initialize(QUERY_1);
         manager.initialize(QUERY_2);
 
@@ -128,7 +129,7 @@ public void testDestroy()
     @Test
     public void testCapacityExceeded()
     {
-        TaskDescriptorStorage manager = new TaskDescriptorStorage(DataSize.of(5, KILOBYTE));
+        TaskDescriptorStorage manager = new TaskDescriptorStorage(DataSize.of(5, KILOBYTE), jsonCodec(Split.class));
         manager.initialize(QUERY_1);
         manager.initialize(QUERY_2);