Don’t work with a large number of posts in the database

Hi.
Use WP Rest Api v2 on the two sites, which differ only in the number of posts.
On first site 10 000 posts. On the second over 300 000.
On the website, where number of posts is small – everything works fine. On the second site error – [code] => 404 rest_no_route.
Tell me how I can solve the problem ? Whether it is connected with the setting of the server ?

• This topic was modified 8 years, 1 month ago by actek2009. Reason: add tags