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Forum Discussion

ppphatak_127926's avatar
ppphatak_127926
Icon for Nimbostratus rankNimbostratus
Oct 15, 2005

CPU utilization upon adding irule condition

Hi, I have a 540 device in place to cater for quite a few websites and peak SSL connections at a time can be around 300. The 540 SSL accl. is capable of supporting 800 per sec. Current CPU util is 30-...
application delivery
dev
devops
iRules
v4
Martin_Machacek's avatar
Martin_Machacek
Historic F5 Account
Oct 20, 2005
Current kernel mode can be determined based on output from:


b summary

Relevant lines are:


BIG-IP Total Number of CPUs              = 2
BIG-IP Mode                              = ANIP MODE
BIG-IP ANIP percent work                 = 0
BIG-IP MAX ANIP percent work             = 0

You can also use following command to get just the kernel mode:


b summary | grep "BIG-IP Mode" | cut -d= -f2-

Output of the cpu bigip command (and about any other Unix command) can be captured to file using output redirection:


cpu bigip > /tmp/cpu_bigip_output

Please refer to the Bash manual page for details. Manual pages can be displayed using the "man" command (e.g. man bash).

Performance impact of direct node selection using the mapclass2node function depends on size of the class and the expression that produces the data processed by mapclass2node. In general it should have similar performance impact as a rule with class matching (one of operator).