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Forum Discussion

mhuss3y_61750's avatar
mhuss3y_61750
Icon for Nimbostratus rankNimbostratus
Aug 02, 2011

Virtual server: impact of http profile

hi, i'd like to know more about the impact of the http profile on connections. We have a virtual server setup to laod balance to MySQL servers - when we apply the http profile to our SQL VIP it seems...
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iamczar_12961's avatar
iamczar_12961
Icon for Cirrus rankCirrus
Aug 05, 2011
Hi mhuss3y,

 

 

Can you check the logs when you applied the HTTP profile and when the connection breaks?

 

 

tail -f /var/log/ltm

 

 

Also, can you capture the tcpdumps?

 

 

tcpdump -ni 0.0:nnn -s0 host or host or host

 

 

Do you know what is the maximum http headers that your getting everytime it failed? The Maximum Header Size in HTTP profile by default is 32768 bytes. BIGIP TMM uses the Maximum Header Size option to create a memory buffer to hold the HTTP header for processing. When a request exceeds the specified HTTP header size limit, the BIG-IP system aborts the connection by sending a TCP RST - that is one posibility that I can think when your connection "breaks".

 

 

Hope that helps.

 

/Czar