These generic messages in the listener log (* nsevwait_error * 0) are most likely caused by a very large Listener log (such as 4Gb or more) or some other type of performance issue on the Server.

也就是排除日过过大后还可能是系统其他性能问题。

从收集到的oswatch中无法获取到有说服力的证据（cpu空闲，IO一直都很繁忙，内存free值在该时间段上呈现上升趋势（page in rate在故障时间呈上升趋势出现峰值但与free的图像结果相反））