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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
design
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