How to reduce Entry load in GL by removing line wise posting to documet wise posting

The Volume of GL is alramingly increasing ,as system is making linewise posting of entries for all transactions including sales. This is increasing the load on GL Where my sale account itself is running in more than 300 pages as each product is getting posted in GL sales line wise. What we are expecting us to complete the posting by periodical postings or by sales invoice wise( document wise) rather than each line wise for each item.

We invite suggestion to reduce the load on GL my making summary posting.
Please share your expert view.