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

dragonflymr's avatar
dragonflymr
Icon for Cirrostratus rankCirrostratus
Dec 08, 2015

iRule killing BIG-IP

Hi,   I have huge issue with iRule obviously killing BIG-IP 2000. In tests iRule logic works OK, but under load BIG-IP is overloaded.   Scenario:   BIG-IP no iRule, 30 to 40k concurrent con...
devops
irule optimization
iRules
LTM
performance
Brad_Parker's avatar
Brad_Parker
Icon for Cirrus rankCirrus
Dec 08, 2015

Try to not use subtables if possible.

 

"Manipulating entries in subtables has higher overhead than manipulating an entry not in a subtable. Each subtable itself also takes up memory. All of the entries in a given subtable are on the same processor. So if you put all of your entries (or the vast majority of them) into the same subtable, then one CPU will take a disproportionate amount of memory and load. Which you probably don't want."

 

https://devcentral.f5.com/wiki/iRules.table.ashx