diff --git a/presto-main/src/main/java/com/facebook/presto/execution/StageStateMachine.java b/presto-main/src/main/java/com/facebook/presto/execution/StageStateMachine.java
index 72cee2f4e33f..0c8d7cdc9d95 100644
--- a/presto-main/src/main/java/com/facebook/presto/execution/StageStateMachine.java
+++ b/presto-main/src/main/java/com/facebook/presto/execution/StageStateMachine.java
@@ -82,8 +82,6 @@ public class StageStateMachine
 
     private final AtomicReference<DateTime> schedulingComplete = new AtomicReference<>();
     private final Distribution getSplitDistribution = new Distribution();
-    private final Distribution scheduleTaskDistribution = new Distribution();
-    private final Distribution addSplitDistribution = new Distribution();
 
     private final AtomicLong peakUserMemory = new AtomicLong();
     private final AtomicLong currentUserMemory = new AtomicLong();
@@ -442,8 +440,6 @@ public StageInfo getStageInfo(Supplier<Iterable<TaskInfo>> taskInfosSupplier, Su
         StageStats stageStats = new StageStats(
                 schedulingComplete.get(),
                 getSplitDistribution.snapshot(),
-                scheduleTaskDistribution.snapshot(),
-                addSplitDistribution.snapshot(),
 
                 totalTasks,
                 runningTasks,
@@ -507,16 +503,6 @@ public void recordGetSplitTime(long startNanos)
         scheduledStats.getGetSplitTime().add(elapsedNanos, NANOSECONDS);
     }
 
-    public void recordScheduleTaskTime(long startNanos)
-    {
-        scheduleTaskDistribution.add(System.nanoTime() - startNanos);
-    }
-
-    public void recordAddSplit(long startNanos)
-    {
-        addSplitDistribution.add(System.nanoTime() - startNanos);
-    }
-
     @Override
     public String toString()
     {
diff --git a/presto-main/src/main/java/com/facebook/presto/execution/StageStats.java b/presto-main/src/main/java/com/facebook/presto/execution/StageStats.java
index 00795b5df534..c07b3a0b0cd7 100644
--- a/presto-main/src/main/java/com/facebook/presto/execution/StageStats.java
+++ b/presto-main/src/main/java/com/facebook/presto/execution/StageStats.java
@@ -39,8 +39,6 @@ public class StageStats
     private final DateTime schedulingComplete;
 
     private final DistributionSnapshot getSplitDistribution;
-    private final DistributionSnapshot scheduleTaskDistribution;
-    private final DistributionSnapshot addSplitDistribution;
 
     private final int totalTasks;
     private final int runningTasks;
@@ -84,8 +82,6 @@ public StageStats(
             @JsonProperty("schedulingComplete") DateTime schedulingComplete,
 
             @JsonProperty("getSplitDistribution") DistributionSnapshot getSplitDistribution,
-            @JsonProperty("scheduleTaskDistribution") DistributionSnapshot scheduleTaskDistribution,
-            @JsonProperty("addSplitDistribution") DistributionSnapshot addSplitDistribution,
 
             @JsonProperty("totalTasks") int totalTasks,
             @JsonProperty("runningTasks") int runningTasks,
@@ -126,8 +122,6 @@ public StageStats(
     {
         this.schedulingComplete = schedulingComplete;
         this.getSplitDistribution = requireNonNull(getSplitDistribution, "getSplitDistribution is null");
-        this.scheduleTaskDistribution = requireNonNull(scheduleTaskDistribution, "scheduleTaskDistribution is null");
-        this.addSplitDistribution = requireNonNull(addSplitDistribution, "addSplitDistribution is null");
 
         checkArgument(totalTasks >= 0, "totalTasks is negative");
         this.totalTasks = totalTasks;
@@ -190,18 +184,6 @@ public DistributionSnapshot getGetSplitDistribution()
         return getSplitDistribution;
     }
 
-    @JsonProperty
-    public DistributionSnapshot getScheduleTaskDistribution()
-    {
-        return scheduleTaskDistribution;
-    }
-
-    @JsonProperty
-    public DistributionSnapshot getAddSplitDistribution()
-    {
-        return addSplitDistribution;
-    }
-
     @JsonProperty
     public int getTotalTasks()
     {
diff --git a/presto-main/src/test/java/com/facebook/presto/execution/TestStageStats.java b/presto-main/src/test/java/com/facebook/presto/execution/TestStageStats.java
index f316e9ce5031..76b4e5080edd 100644
--- a/presto-main/src/test/java/com/facebook/presto/execution/TestStageStats.java
+++ b/presto-main/src/test/java/com/facebook/presto/execution/TestStageStats.java
@@ -30,12 +30,10 @@
 
 public class TestStageStats
 {
-    public static final StageStats EXPECTED = new StageStats(
+    private static final StageStats EXPECTED = new StageStats(
             new DateTime(0),
 
             getTestDistribution(1),
-            getTestDistribution(2),
-            getTestDistribution(3),
 
             4,
             5,
@@ -92,13 +90,11 @@ public void testJson()
         assertExpectedStageStats(actual);
     }
 
-    public static void assertExpectedStageStats(StageStats actual)
+    private static void assertExpectedStageStats(StageStats actual)
     {
         assertEquals(actual.getSchedulingComplete().getMillis(), 0);
 
         assertEquals(actual.getGetSplitDistribution().getCount(), 1.0);
-        assertEquals(actual.getScheduleTaskDistribution().getCount(), 2.0);
-        assertEquals(actual.getAddSplitDistribution().getCount(), 3.0);
 
         assertEquals(actual.getTotalTasks(), 4);
         assertEquals(actual.getRunningTasks(), 5);