diff --git a/core/src/main/scala/org/apache/spark/ui/ToolTips.scala b/core/src/main/scala/org/apache/spark/ui/ToolTips.scala
index 37708d75489c801d9edfdb8974f1e9dfb5a19978..9ced9b8107ebfa9ea7c21075861cb1314ca325ca 100644
--- a/core/src/main/scala/org/apache/spark/ui/ToolTips.scala
+++ b/core/src/main/scala/org/apache/spark/ui/ToolTips.scala
@@ -20,9 +20,9 @@ package org.apache.spark.ui
 private[spark] object ToolTips {
   val SCHEDULER_DELAY =
     """Scheduler delay includes time to ship the task from the scheduler to
-       the executor, and time the time to send a message from the executor to the scheduler stating
-       that the task has completed. When the scheduler becomes overloaded, task completion messages
-       become queued up, and scheduler delay increases."""
+       the executor, and time to send the task result from the executor to the scheduler. If
+       scheduler delay is large, consider decreasing the size of tasks or decreasing the size
+       of task results."""
 
   val INPUT = "Bytes read from Hadoop or from Spark storage."