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sa1eh_368374's avatar
sa1eh_368374
Icon for Nimbostratus rankNimbostratus
Jul 30, 2018

Why f5 traffic load goes more to one server over the others?

In my work place we have f5 load balancer connected to 5 servers 3 physical and 2 VMware VM's

 

and the application is Oracle Weblogic my questions are

 

1) Most of the load goes to one of the VM's not to the rest the weird thing is the other VM is same in specs as the other one what are the reasons for that happening?.

 

2) What is the best way to trace the performance of the application as whole starting from the client going through load balancer to Weblogic web server ending with Oracle DB.

 

application delivery
BIG-IP

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  • Jhaunu_Gupta's avatar
    Jhaunu_Gupta
    Icon for Nimbostratus rankNimbostratus
    Jul 30, 2018

    what is load balancing scheme for in the pool, and check connection entry,once connection established to one pool.so for same client IP port it will go to same pool.

     

  • Surgeon's avatar
    Surgeon
    Ret. Employee
    Jul 30, 2018

    connection balancing depends on many factors.

     

    1) Sort of LB method

     

    2) Existence of persistence profile

     

    3) Existence of oneconnect profiles

     

    4) iRule config if any

     

    etc

     

    Can you provide your VIPs and pool config 1st

     

  • Stanislas_Piro2's avatar
    Stanislas_Piro2
    Icon for Cumulonimbus rankCumulonimbus
    Jul 30, 2018

    I had a customer with such behavior... the problem was a different configuration on servers. some were configured to close connection after every requests (apache parameter KeepAlive Off)

     

    With such configuration, some servers handled less connections, but more requests than others.

     

  • sa1eh_368374's avatar
    sa1eh_368374
    Icon for Nimbostratus rankNimbostratus
    Jul 30, 2018

    Thanks after some investigation we knew exactly what is the issue it was a service on one of the server lagging and showing a white page so the request end faster then other servers for this reason the load balancer assumes it's faster server.

     

    How I can check string on a page to make sure it's loading fine?