WordPress Admin Dashboard Loading Slowly

WordPress Admin Dashboard Loading Slowly - MakeWPFast
Warning Frequency: Common
Error message: wp-admin takes 5+ seconds to load

A slow WordPress admin is often caused by different factors than a slow frontend. The admin loads more PHP, makes more database queries, and runs the Heartbeat API which polls the server every 15 seconds.

Common Causes

  1. Plugins loading heavy assets on every admin page
  2. Dashboard widgets making external API calls (update checks, news feeds)
  3. Heartbeat API running too frequently (default: every 15 seconds)
  4. Large database with many post revisions
  5. Admin-heavy plugins (WooCommerce, page builders) loading full assets

How to Fix It

  1. Limit Heartbeat API: Add define('WP_HEARTBEAT_INTERVAL', 60); to wp-config.php or disable it on specific pages
  2. Remove unnecessary dashboard widgets: Use remove_meta_box() for widgets you don't need
  3. Limit post revisions: define('WP_POST_REVISIONS', 5); in wp-config.php
  4. Clean up revisions: wp post delete $(wp post list --post_type=revision --format=ids) --force
  5. Use Query Monitor plugin to identify slow queries and slow plugins on admin pages
  6. Disable admin notices from plugins that add persistent nag banners
Related Errors
WordPress Slow Queries from Autoloaded Options BloatWordPress Fatal Error: Allowed Memory Size Exhausted
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