Page loading too slow in NAV.

Hello All,

I have created one table "X Table Name" where there are around 55 million records whose primary key is only "Entry No.". I created one simple list page by using one of the filters as posted = false but the time taken to load that page is too long. I added some secondary keys in table as well but no luck. Is there anything I can further do to improve the page performance drastically in NAV?

Any help would be appreciated.