Github user XuTingjun commented on the pull request:
https://github.com/apache/spark/pull/3456#issuecomment-64977581
val tasks = stageData.taskData.values.toSeq.sortBy(_.taskInfo.launchTime)
val showTasks = tasks.slice(actualFirst, Math.min(actualFirst + pageSize,
tasks.size))
From the code above, we can see "tasks" will sort all tasks of the
application, and the "showTasks" is the sub-range of "tasks". So the
"showTasks" has sorted all tasks not sub-range.
As JoshRosen says, the large NodeSql takes most memory, so we just need to
reduce the node number of html. With pagination, we can reduce the node to a
low number. So I still think pagination is a reasonable solution.
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