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User Guide for the Cisco Network Analysis Module (NAM) Traffic Analyzer, 5.0
OL-22617-01
Chapter 3 Monitoring and Analysis
Response Time
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
between the client request arriving at the server and the first response packet being
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.
Min Server Response Time
Max Server Response Time
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
TCP 3-way handshakes. If there are no new TCP connections made during the
monitoring interval, this metric is not reported.
Min Network Time
Max Network Time
Average Client Network Time Client Network Time is the network time between a client and the NAM switch or
router.
In WAAS monitoring, Client Network Time from a WAE client data source represents
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).
Min Client Network Time
Max Client Network Time
Average Server Network Time Server Network Time is the network time between a server and NAM probing point.
In WAAS monitoring, Server Network Time from a server data source represents the
network time between the server and its core WAE.
Min Server Network Time
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.
Use Total Response Time with care because it is not measured directly and mixes the
server response time metric with the network time metric.
Min Total Response Time
Max Total Response Time
Average Transaction Time Transaction Time is the total amount of time between the client request and the final
response packet from the server.
Transaction times may vary depending upon client usages and application types.
Transaction Time is a key indicator for monitoring client experiences and detecting
application performance anomalies.
Min Transaction Time
Max Transaction Time
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
Table 3-7 Application Response Time Metrics (continued)
Metric Description