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saveworldgetgir's avatar
saveworldgetgir
Icon for Nimbostratus rankNimbostratus
Oct 03, 2018

Slow HTTP Response Action

Hello

 

We had an issue recently where some servers in a pool began to respond slowly to HTTP requests ( 25 seconds + ). As this is a voice IVR application this is not good and caused an incident.

 

We have been asked to see what is possible on the LTM to mark a pool member out of service should the HTTP response times reach a certain threshold, maybe for a period of time.

 

In your experience what is the art of the possible? Ideally a profile or monitor would be preferable over a iRule, however, we appreciate that an iRule may be the only option.

 

Thanks

 

application delivery
iRules
LTM

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  • Lee_Sutcliffe's avatar
    Lee_Sutcliffe
    Icon for Nacreous rankNacreous
    Oct 03, 2018

    Do you have a health monitor applied to the Pool associated with your virtual server?

     

    A properly configured health monitor would be able to detect when a pool member is not responding withing pre-defined thresholds. A default timeout for the 'http' monitor is 16 seconds. However you can create a custom monitor that meets your requirements.

     

    The general rule is the timeout equals 3x the monitor interval + 1