For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

Jim_Moore's avatar
Jim_Moore
Icon for Nimbostratus rankNimbostratus
Apr 12, 2011

6400 Capacity

We are looking to get the most life out of our 6400's. In trending CPU usage using tmstat we see CPU around 55% - 60% during the business day.     We have plans to go to v10 but I wanted to k...
application delivery
design
performance
testing
hoolio's avatar
hoolio
Icon for Cirrostratus rankCirrostratus
Apr 12, 2011
Hi Jim,

 

 

On a 6400 running 9.x, CPU0 will be used for host processes and CPU1 will be dedicated to TMM. I'd be concerned if peaks in traffic started regularly using 75% of CPU1. I expect increased latency at 85-95% CPU utilization. If CPU0 gets up to 95-100% CPU utilization for realtime (not "niced") processes, you could see bigd failing to perform monitor checks and pool members flapping. This will have an impact on load balanced traffic as users get bounced around pool members.

 

 

At 85 - 95% memory utilization, TMM will start reaping old connections:

 

 

sol5670: Overview of adaptive connection reaping

 

http://support.f5.com/kb/en-us/solutions/public/5000/600/sol5670.html

 

 

In v10, if your config is CMP compatible, TMM will run on both CPUs. You'll have more load balancing capacity than on v9 using one CPU.

 

 

http://devcentral.f5.com/wiki/default.aspx/iRules/CMPCompatibility.html

 

 

Aaron