Edit record issue

Edit record issue

Hi

In my application record usage limit is 140000 and I used 120000.I have still 2000 records to add.But when I go to one of 
form in my application that has 19000 records and when I try to edit record it's hanging it doesn't showing the edit page window, it just spining like "Please wait...". Can you please let me know why this happens.

Thanks.