santosh_81454
May 14, 2012Nimbostratus
Latency on First HTTP request.
We are load balancing a web sphere server running multiple instances. (Each instance of the server is running on different port and hence we have created the instances as pool members).
We have configured SNATS to overcome Asymmetric routing to this server.
There are other servers, which will pull data from the load balanced instances by connecting to the VIP. The apps that are configured on the servers that call the VIP are designed for a timeout value of 50ms.
Our issue is, the initial request to the VIP is taking around 2000ms (not 2000 always, but it varies between 2sec to 9 Sec) to be processed, but the consecutive requests are processed within 22 - 35 ms.
Not sure, why the first request is taking longer time. Did anyone face similar issue ? How to resolve the latency issue for the first request ?
(We are running the LTM on VCMP of Virpion - V11.1 HF2. LB method used for the pool is Round Robin. )
Any help is greatly appreciated.
Thanks,
Santosh.