Parameters are must in the case of load testing of web 
server because to check the response time of the server
for both application and dat base server

While using LR We have to emulate real users where they use 
different sets of data inputs to the server. If u use same 
set of data the server may feel that it's enough to send 
the data send from cashe it self.So the actual measure of 
server performance maight degreed.

Parameterization is necessary in order to establish a real  
time environment i.e ( there may be n-number of scenarios 
in an application not all users will acesses the same 
scenario) .so to establish  real environment 
paramertization is needed.


Maheshwar,
maheshwar_sonu@yahoo.co.in
Please correct me if i am wrong.