Changing the URL length on the BIG-IP

Hello guys.

I have a situation that we are receiving more than 2048 bytes (the highest value was 2125 bytes. We are running an phisical equipament (i2800) in the version 15.1.0.

I understood the way to increase this value, but the question is, if i increase this value to the actual value of the requests can it decrease the performance or something like that ?

Other question is, there is a way to "bypass" this rule with another way without using the ecard_max_http_req_uri_len parameter to just one Virtual Server ? (Like an iRule or something like that).

Best Regards.