Cisco Cisco Web Security Appliance S170 사용자 가이드
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Cisco IronPort AsyncOS 7.7.5 for Web User Guide
Chapter 23 Web Security Appliance Reports
System Capacity Page
shows the last three graphs on the System Capacity page.
Figure 23-14
System Capacity Page—Lower Graphs
The System Capacity report includes graphs that show the overall CPU usage on the appliance. AsyncOS
for Web is optimized to use idle CPU resources to improve transaction throughput. High CPU usage may
not indicate a system capacity problem. The CPU Usage by Function graph that displays the percentage
of CPU cycles used by different functions, such as the Web Proxy and Logging. The CPU Usage by
Function graph can indicate which appliance components use the most resources. If you need to
optimize your appliance, this graph can help you determine which functions may need to be tuned.
for Web is optimized to use idle CPU resources to improve transaction throughput. High CPU usage may
not indicate a system capacity problem. The CPU Usage by Function graph that displays the percentage
of CPU cycles used by different functions, such as the Web Proxy and Logging. The CPU Usage by
Function graph can indicate which appliance components use the most resources. If you need to
optimize your appliance, this graph can help you determine which functions may need to be tuned.
The Response Time/Latency and Transactions Per Second graphs shows the overall response time (in
milliseconds), and transactions per second for the date range specified in the Time Range drop-down
menu.
milliseconds), and transactions per second for the date range specified in the Time Range drop-down
menu.
The lower three graphs on the System Capacity report show the outgoing connections, the bandwidth the
appliance uses connecting out to upstream servers, and the size of the Web Proxy memory buffer.
appliance uses connecting out to upstream servers, and the size of the Web Proxy memory buffer.
The Proxy Buffer Memory may indicate spikes in network traffic, but if the graph climbs steadily to the
maximum, the appliance may be reaching its maximum capacity and you should consider adding
capacity.
maximum, the appliance may be reaching its maximum capacity and you should consider adding
capacity.
Interpreting the Data You See on System Capacity Page
When choosing time ranges for viewing data on the System Capacity page, the following is important to
remember:
remember: