Forum Discussion

pagema1_69881's avatar
pagema1_69881
Icon for Nimbostratus rankNimbostratus
Mar 08, 2010

Very Slow Application performance behind F5

We have one application that performs very poorly behind F5. There is a 9 second delay on the initial GET request going through the VIP. If we bypass the F5 to the servers directly there is no delay...
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hooleylist's avatar
hooleylist
Icon for Cirrostratus rankCirrostratus
Mar 08, 2010
Hi Marc,

 

 

I'd hope the tcpdumps would show enough information to start troubleshooting this. It sounds like you've already checked the main things like port duplex and played around with the TCP profile options. I think your best bet would be to analyze the tcpdumps with F5 Support and go from there.

 

 

I have read here that LAN optimized profiles generally provide better results over the WAN optimized profile even with public internet-based web apps.

 

 

Here are a few related posts:

 

 

FastL4 vs Optimized TCP Profiles

 

http://devcentral.f5.com/Default.aspx?tabid=53&forumid=31&postid=31604&view=topic

 

 

Any simple / quick ways to improve web traffic

 

http://devcentral.f5.com/Default.aspx?tabid=53&forumid=31&tpage=1&view=topic&postid=30500

 

 

Implementing TCP Lan Optimized Profile.

 

http://devcentral.f5.com/Default.aspx?tabid=53&forumid=31&tpage=1&view=topic&postid=31697

 

 

ICMP Virtual Server

 

http://devcentral.f5.com/Default.aspx?tabid=53&forumid=31&tpage=1&view=topic&postid=33817

 

 

Aaron