当响应数据可用时发生。
OnResponseDataAvailable Occurs when data is available from the response.
当响应消息流完成处理之后，它还向log队列发送一条消息。
When the response message flow finishes processing, it also sends a message to the LOG queue.
当响应时间变慢时，DBA如果能在接到操作中心的电话之前就知道这一点就好了。
When response time is slow, it is a good idea for the DBA to know prior to getting a call from the operations center.
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