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Chris_Huston_16's avatar
Chris_Huston_16
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Mar 29, 2011

iRule performs 100x slower under load

Hello,   I have an iRule (BIGIP v9.4.8) whose HTTP_REQUEST timing performance drops by 100x when under load. How can I diagnose what's happening? Under what conditions can an iRule slow down (in t...
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The_Bhattman's avatar
The_Bhattman
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Mar 30, 2011
Hi Chris,

 

I suppose I would do a ramp up test. Specifically determine if the performance degradation is linear or does it degrade when it reaches a specific specific amount.

 

 

Other areas that I would check is to do a bug scrub of the version you are using. Another item that I would check would be the ECV. Several years go my operational counterparts noticed in one of our v9 ADCs performance degredation was attributed to aggressive monitoring that was applied overtime. He noticed only when there was load applied. The fix was to adjust the monitoring to default levels and everything worked out.

 

 

Other than that I would definitely get F5 support involved which they can take a deeper look into what's happening.

 

 

I hope this helps,

 

Bhattman