Custom Post Type + 20k posts = blank/404 within Admin edit.php [duplicate]

I do not think that there is any sane way to sort this issue with the amount of posts you have except than setting hierarchical to false. Setting hierarchical to true has huge impact on performance and aren’t really meant for use in custom post types.

If you do not need a parent/child relationship between posts like the build-in post type page have, then you should really set hierarchical to `false. If you really need that relationship, then you are pretty much stuffed unfortunately. With the amount of posts you have I cannot see any viable solution to sort your issue

Just a tip, remember to flush your permalinks after setting hierarchical to false

Related Posts:

  1. Backend search; include CPT meta?
  2. How to programatically set the post title of a CPT on wp-admin
  3. Display custom fields from custom posts in RSS feed
  4. Tracking changes in admin-page so user gets warning when leaving the page
  5. It’s possible to hide body copy box for a custom post type?
  6. Custom Field values not Showing in Edit Page of Custom Post Type
  7. Change Post Meta via AJAX from the posts list table
  8. WP Admin Dropdown List Filter for custom (ACF) field on custom post type(s)
  9. Sort custom post column by generated value?
  10. Simple Data picker meta box
  11. Query Distinct Taxonomies of Custom Post Type
  12. Custom post type won’t take my custom fields
  13. Show a custom field instead of username in the backend author area
  14. Row actions for custom post types?
  15. Help Creating a Slideshow Custom Post Type with Custom Meta Boxes?
  16. Add content in custom post type page after the title and before columns
  17. Search multiple custom fields by using meta_query
  18. Custom Post Type – Taxonomy Dropdown Menu?
  19. How do I implement custom fields without using any plugins?
  20. Filtering Posts by Multiple Taxonomy Terms such as in an Admin Post Listing?
  21. How I check if the same post slug has not been used before publishing?
  22. How to sort a table of custom posts by column containing custom field
  23. Issue with saving custom post type when editor is removed
  24. How to remove CPT comment feed from head?
  25. convert Custom Fields Option-Values to Tags/Taxonomy
  26. Automatically Insert Custom Field on Custom Post Type Publish
  27. How do I add a custom button to my “edit” list? ( edit.php?post_type= ) beside “Add New”
  28. Remove “Get Shortlink” button in admin of custom post type
  29. Display custom post types with custom date field value (before today) & order by custom date field
  30. How to have the right design for a custom post type without accessing themes
  31. Get all of user’s custom post types in WP Admin for plugin
  32. Create a post in custom post type using field in registration form after users submit form
  33. WordPress custom meta field for custom post not storing data
  34. Conditional regex in add_rewrite_rule() for specific query filters & pagination
  35. How To Create A Custom Taxonomy 404 Page
  36. How to Duplicate (multiple meta box)?
  37. How to structure a site with product variations pages?
  38. Save an array from drop-down in custom meta box
  39. How do increase the amount of links shown down the left in the admin menu?
  40. Including Custom Meta with posts_where query
  41. How to create shortcode to display custom field value on a custom post type
  42. Custom taxonomy in URL showing 404
  43. Custom Post Type Draft Preview Goes to 404
  44. Convert simple SQL Query to WordPress query
  45. How to set up multisite for multi language?
  46. Add meta value to custom post type on publish
  47. Creating a Custom Post as a repository for theme constants
  48. Custom Post List View: Page or something else?
  49. Orderby CPT custom fields not working
  50. How to create a custom post type with additional fields?
  51. Order Custom Post Type by Custom Field Value
  52. Custom post type permalink tag 404
  53. Custom post type / taxonomy rewrite archive page 2 gives 404
  54. Hierarchical custom fields
  55. Fields for different parts of a page
  56. Facebook social publisher and custom post type fields [closed]
  57. Searching Custom Fields
  58. Custom Post Meta from custom metaboxes is randomly being deleted
  59. How to get specific post meta by title or id
  60. page not found for single-type.php file
  61. Populate a custom field dropdown with post titles by author
  62. Hide Status Option From WordPress Publish Metabox and Rename Published on:
  63. echo selected value from dropdown
  64. Category Search / Custom Post Type search on my website. Custom Post Types that are “page-like”?
  65. Get data from PHP to JavaScript to set position of each post on front page
  66. How to display a WordPress Custom Field only on a specific day of the week?
  67. Filtering custom posts by custom fields (ACF) [closed]
  68. Incorrect ordering of custom post type based on time
  69. How can I see a list of products that I have set to outofstock through a custom field check box?
  70. delete duplicate meta_value with same post_id
  71. Writing a custom Glossary plugin
  72. Filter search posts by post meta?
  73. Change Text in Admin Panel
  74. How can I put content before my custom post type default pages?
  75. Adding a location field to buddypress activity
  76. How we can create menu from Appearance > Menu and use as a add-submenu-page for admin menu?
  77. How to only display all posts to a custom User Role?
  78. Unable to gather Image URL from Custom Post Type’s; Custom Meta Field
  79. register_rest_field update_callback don’t work for $_FILES
  80. How to convert Post Object Custom Field into Tags
  81. Custom meta fields not showing up in WP_Response Object via custom endpoint
  82. Query a Custom Post Type using SELECT that has ACF fields to compare dates
  83. I want to create a metabox under custom taxonomy
  84. Filter custom WP_Query by first letter of a custom field – hopefully using Search and Filter Pro?
  85. How to override post-new.php with custom template
  86. check_admin_referer not working in custom meta box for custom post type
  87. How to display all custom fields associated with a post type – IN THE ADMIN AREA?
  88. Setting a custom $query->query_vars[‘meta_key’] breaks the WordPress menu
  89. Filtering in admin broken for custom post type in 3.8.1?
  90. WP_Query and two custom fields returns no posts
  91. I want to split this into two functions
  92. Repeatable Custom Field for Media Upload
  93. How to store datetime from custom meta box so that it can be sorted by
  94. Adding a custom field after post title (ex.Example Title [30 Second Read])
  95. Display ACF object field data using Elementor Custom Query
  96. Sortable admin columns ordering from custom fields isn’t combine com search and Dropdown filter
  97. WordPress custom field sorting, weird behavior: the latest post is at the end
  98. I want to understand plugin implementation of custom posts / taxonomies / metaboxes
  99. Custom order of CPT posts by title, in wp-admin area by default
  100. How to consume external API from WordPress post editor and display the response data in the custom field?
tech