Cisco Cisco Email Security Appliance C170 Guia Do Utilizador
28-27
Cisco AsyncOS 9.5 for Email User Guide
Chapter 28 Using Email Security Monitor
Email Security Monitor Pages
for system capacity. You might also want to compare the Outgoing Mail data with the Outgoing
Destinations data to view the trends in volumes of emails that are being sent from specific domains or
IP addresses.
Destinations data to view the trends in volumes of emails that are being sent from specific domains or
IP addresses.
System Capacity-System Load
The system load report shows the following:
•
•
•
Overall CPU Usage
Email Security appliance is optimized to use idle CPU resources to improve message throughput. High
CPU usage may not indicate a system capacity problem. If the high CPU usage is coupled with
consistent, high-volume memory page swapping, you may have a capacity problem.
CPU usage may not indicate a system capacity problem. If the high CPU usage is coupled with
consistent, high-volume memory page swapping, you may have a capacity problem.
Note
This graph also shows the threshold level for CPU usage. If you want to change the threshold level, use
the System Administration > System Health page in web interface or
the System Administration > System Health page in web interface or
healthconfig
command in CLI.
See
.
This page also shows a graph that displays the amount of CPU used by different functions, including
mail processing, spam and virus engines, reporting, and quarantines. The CPU-by-function graph is a
good indicator of which areas of the product use the most resources on your system. If you need to
optimize your appliance, this graph can help you determine which functions may need to be tuned or
disabled.
mail processing, spam and virus engines, reporting, and quarantines. The CPU-by-function graph is a
good indicator of which areas of the product use the most resources on your system. If you need to
optimize your appliance, this graph can help you determine which functions may need to be tuned or
disabled.
Memory Page Swapping
The memory page swapping graph shows how frequently the system must page to disk. This graph also
shows the threshold level for memory page swapping. If you want to change the threshold level, use the
System Administration > System Health page in web interface or
shows the threshold level for memory page swapping. If you want to change the threshold level, use the
System Administration > System Health page in web interface or
healthconfig
command in CLI. See
Resource Conservation Activity
The resource conservation activity graph shows the number of times the appliance entered Resource
Conservation Mode (RCM). For example, if the graph shows
Conservation Mode (RCM). For example, if the graph shows
n
times, it means that the appliance has
entered RCM
n
times and exited at least
n-1
times.
Your appliance should enter RCM infrequently and only during a very large or unusual increase in mail
volume. If the Resource Conservation Activity graph shows that your appliance is entering RCS
frequently, it may be an indication that the system is becoming overloaded.
volume. If the Resource Conservation Activity graph shows that your appliance is entering RCS
frequently, it may be an indication that the system is becoming overloaded.
Note about Memory Page Swapping
The system is designed to swap memory regularly, so some memory swapping is expected and is not an
indication of problems with your appliance. Unless the system consistently swaps memory in high
volumes, memory swapping is normal and expected behavior, especially on C170/C180 appliances. To
improve performance, you may need to add appliances to your network or tune your configuration to
ensure maximum throughput.
indication of problems with your appliance. Unless the system consistently swaps memory in high
volumes, memory swapping is normal and expected behavior, especially on C170/C180 appliances. To
improve performance, you may need to add appliances to your network or tune your configuration to
ensure maximum throughput.