Attribule all content of users being deleted to the new one when 200000 users

You’re likely getting time out errors due to the sheer volume of users. The WP reassignment routine isn’t very efficient. If a user’s post were already reassigned before deleting them, removal should happen in the allotted time.

You can reassign the author of a page’s worth of posts to another user through the bulk edit feature on the post lists table. You can increase the number of posts on a page through the screen options tab at upper right. I think you are limited to 99 posts per page.

If a user has so many posts that even 99 is not enough, you could use the interconnect/it script to update a particular post_author ID to another. AFAIK changing the post_author value is all that is required to reassign a post. I’ve not thoroughly investigated reassignment this way. Backup your DB before making changes like this. Make only a few limited reassignments at first and test thoroughly before making widespread changes.

@bcworkz Tnx a lot.
Actually I put all PHP and Apache limits to infinity – so this is definitely
is not some limit on server side. I think it happens when browser tries to build this huge select with a lot of users inside. Even when I turned off all apps except the browser on my laptop – I succeed to do this task on some of the websites.
Anyway the solution for me was:
1)to update “post_author” field of all posts in “wp_posts” table where posts belonged to the users I needed to delete. So I just updated author of these posts to be the new admin I added;
2)to delete all data of the users needed to be deleted from “wp_usermeta” table; 3)to delete the users I want to delete from “wp_users” table.
I did all directly via MySQL console. So I hope I did not lose any content ))

Tnx very much for help.