Cisco Systems NAM, 5 manual Metric Description

Chapter 3 Monitoring and Analysis

Response Time

Table 3-7	Application Response Time Metrics (continued)
Metric		Description
Number of unresponsive connections		Number of TCP connection requests (SYN) that are not responded during the
		monitoring interval
Number of refused connections		Number of TCP connection requests (SYN) that are refused during the monitoring
		interval
Average Connection duration		Average duration of TCP connections during the monitoring interval
Average Server Response Time		Server Response Time is the time it takes an application server (for example, a web
		server) to respond to a request. This is the server "think time," which is the time
Min Server Response Time
		between the client request arriving at the server and the first response packet being
Max Server Response Time
		returned by the server.
		Increases in the server response time usually indicate problems with application
		and/or server resources, such as the CPU, Memory, Disk, or I/O.
Average Network Time		Network time between a client and a server. Network Time is the sum of Client
		Network Time and Server Network Time. NAM measures the Network Time using
Min Network Time
		TCP 3-way handshakes. If there are no new TCP connections made during the
Max Network Time
		monitoring interval, this metric is not reported.
Average Client Network Time		Client Network Time is the network time between a client and the NAM switch or
		router.
Min Client Network Time
		In WAAS monitoring, Client Network Time from a WAE client data source represents
Max Client Network Time
		the network RTT between the client and its edge WAE, while Client Network Time
		from the WAE server data source represents the WAN RTT (between the edge and
		core WAEs).
Average Server Network Time		Server Network Time is the network time between a server and NAM probing point.
Min Server Network Time		In WAAS monitoring, Server Network Time from a server data source represents the
		network time between the server and its core WAE.
Max Server Network Time
Average Total Response Time		Total Response Time is the total amount of time between the client request and when
		the client receives the first response packet from the server.
Min Total Response Time
		Use Total Response Time with care because it is not measured directly and mixes the
Max Total Response Time
		server response time metric with the network time metric.
Average Transaction Time		Transaction Time is the total amount of time between the client request and the final
		response packet from the server.
Min Transaction Time
		Transaction times may vary depending upon client usages and application types.
Max Transaction Time
		Transaction Time is a key indicator for monitoring client experiences and detecting
		application performance anomalies.
Number of Transactions		The number of transactions completed during the monitoring interval.
Average Data Transmission Time		Elapsed time from the first server-response packet to the last server-response packet,
		excluding retransmission time.
Average Data Time		Data Time: Average data time portion of transaction time.
Packets Retransmitted		Number of retransmitted packets detected during the monitoring interval
Bytes Retransmitted		Number of retransmitted bytes detected during the monitoring interval
Average Retransmission Time		Average time to retransmit lost packets per transaction

	User Guide for the Cisco Network Analysis Module (NAM) Traffic Analyzer, 5.0
OL-22617-01		3-21