Forum Discussion

aelred_1927's avatar
aelred_1927
Icon for Nimbostratus rankNimbostratus
May 28, 2009

Sticky CPU utilization (debunking info needed)

First, sorry if this is a bit off-topic.     We are having a raging debate in a large enterprise environment regarding use of Cisco's ACE product vs. F5 BigIPs for a new GTM/GLB function. ...
config
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dennypayne's avatar
dennypayne
Icon for Employee rankEmployee
May 28, 2009
Hi,

According to SOL 7751 (Click here), it depends on what type of persistence is used. Specifically: 

  
 If a virtual server references any of the following BIG-IP system features, CMP is disabled for that virtual server and handled by TMM0 only:  
 * A rate class  
 * iRules global variables  
 * A persistence profile or iRule using a method other than cookie persistence  
 Note: Cookie persistence methods are exempt from CMP demotion since they are the only methods which do not store information in 
  memory; instead, they write persistence information to a cookie that is then read each time the client sends the cookie back in a  
  subsequent request.

So as long as you use cookie persistence, CMP will remain enabled.

Denny