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Sekhar's avatar
Sekhar
Icon for Nimbostratus rankNimbostratus
Feb 12, 2015

Slow page response acessing for first time

Hi, we have a web app running on windows IIS servers which opens instantly, but when trying through LTM it is taking around 3 min to open for first time only and opens immediately when accessed secon...
application delivery
deployment
LTM
performance
StephanManthey's avatar
StephanManthey
Icon for Nacreous rankNacreous
Feb 12, 2015

Hi Sekhar,

did you try to run a tcpdump to capture the traffic and see where it slows down?

I guess after first request you will have keep-alive connections established which improves the browsing experience.

Please run a trace as follows: 
tcpdump -i 0.0:nnnp -s 0 -w /var/tmp/issue001.cap host

Get the trace via SCP from /var/tmp/issue001.cap and load it into WireShark. Make sure to have the F5 WireShark plugin installed to decode the ethernet trailer data.

Maybe you are using a WAN optimized TCP profile with the Nagl´s Algorithm enabled which uses to slow down things sometimes.

Thanks, Stephan