Cisco Cisco Email Security Appliance C160 Mode D'Emploi

If you suspect that there are there are performance problems with the appliance, utilize the following 
strategies:

Use the 

rate

 and 

hostrate

 commands to check the current system activity. 

The 

rate

 command returns real-time monitoring information about email operations. For more 

information, see 

. 

The 

hostrate

 command returns real-time monitoring information for a specific host. 

Use the 

status

 command to cross-check the historical rates to check for degradation.

Use the 

status detail

 command to check the RAM utilization. 

You can use the 

status detail

 command to quickly see the system’s RAM, CPU, and Disk I/O 

utilization.

RAM utilization should always be less than 45%. If RAM utilization exceeds 45%, then, the appliance 
will enter “resource conservation mode;” it initiates a “back-off” algorithm to prevent over-subscription 
of resources and sends out the following email alert:

This situation occurs only with an aggressive injection with poor deliverability facilities. If you 
encounter RAM utilization exceeding 45%, check the number of messages in the queue and see if a 
particular domain is down or unavailable for delivery (via the 

hoststatus

 or 

hostrate

 commands). 

Also check the status of the system and ensure that delivery is not suspended. If after stopping the 
injection you continue to experience a high RAM utilization, contact Cisco Customer Support. See 

. 

Is the problem specific to one domain? 

Use the 

tophosts

 command to get immediate information about the email queue and determine if a 

particular recipient domain has delivery problems. 

Check the size of the queue. You can delete, bounce, suspend, or redirect messages in the email 
queue to manage its size, or to deal with recipients to a specific, problematic domain. For more 
information, see 

. Use these commands: 

deleterecipients

bouncerecipients

TLS successfully connected to mxe.example.com.

TLS verification completed.

This system (hostname: hostname) has entered a 'resource conservation' mode in order to 

prevent the rapid depletion of critical system resources.

RAM utilization for this system has exceeded the resource conservation threshold of 45%. 

The allowed injection rate for this system will be gradually decreased as RAM 

utilization approaches 60%.