Can we increase the system/security/session size at admin On Magento 2

I need to know, Is there any side issues, if we increase the below path size more than max in config file.

system/security/max_session_size generally as per magento max size is 256000 

Can we increase more then 256000 until which limit can we extend the size.

Anyone who know ever used or know please answer my question so It can solve my problem.