The Dashboard tab provides a quick view of Forefront TMG performance counters. During Forefront TMG installation, Performance Monitor is installed, providing a customized view of the Windows Performance Monitor that contains only Forefront TMG counters.
This topic contains some suggestions regarding which performance counters to monitor for load monitoring and security monitoring.
Using the Performance Monitor
To use the Performance Monitor
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Click Start, click Microsoft Forefront TMG, and then click Forefront TMG Performance Monitor.
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In the Reliability and Performance Monitor, a number of default counters appear. The following table lists these counters, and their general usage.
Category Performance counter name Usage Forefront TMG Firewall Packet Engine
Active Connections
The total number of active connections currently passing data. Use this counter to monitor general performance.
Forefront TMG Firewall Packet Engine
Bytes/sec
Total throughput in bytes per second passing through the firewall. Every byte is counted twice: once when it enters the firewall, and once when it leaves the firewall. Use this counter to monitor general performance.
Forefront TMG Firewall Service
Active Sessions
The number of active sessions for the Firewall service. Use this counter to monitor general performance. By comparing this counter at both peak and off-peak times, a good picture of routine usage can be built up.
Forefront TMG Web Proxy
Requests/sec
The request rate each second. Use this counter to monitor general performance. Dividing the Client Bytes Sent/sec counter by this counter provides a measure of average response size, which should be no more than approximately 20 KB.
Forefront TMG Firewall Packet Engine
Dropped packets/sec
The number of denied packets per second. Use to monitor general security threats. If numbers are large (more than 100), check for network configuration errors and attacks.
Forefront TMG Firewall Packet Engine
Packets/sec
The number of allowed and denied packets per second. Use to monitor general security threats and performance. This directly impacts CPU utilization.
Forefront TMG Firewall Packet Engine
Connections/sec
The number of TCP and UDP connections created per second. Use to monitor general security threats and performance. This directly impacts CPU utilization.
Forefront TMG Web Proxy
Average Milliseconds/request
The average response time. Use to monitor general security threats and performance. Use direct fetches and cache fetches to diagnose.
Related Topics
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