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Bots hitting xmlrpc.php and causing a high load
Due to a security issue in earlier versions of WordPress that allowed posting from xmlrpc.php, bots scan remote servers for the vulnerability which can cause high loads.
Changed theme and now cannot access WordPress site or wp-admin
If your theme has an issue and WordPress only shows a blank (white) page and you need to change the theme but cannot access the WP-admin dashboard, you can manually edit the following database tables ...
High resource usage from /wp-admin/admin-ajax.php
If you are seeing a high amount of resource usage due to /wp-admin/admin-ajax.php, it could most likely be due to the WordPress Heartbeat API.
How do I force SSL or HTTPS on my WordPress website?
You can install the following WordPress plugin to force HTTPS or SSL on your WordPress website:
How do I limit login attempts or block brute force?
If you are experiencing a brute force attack on your wp-admin section, it is not only a security issue, it can also cause higher resource usage for your account.
I receive a 404 page not found error when clicking links in WordPress
If you receive a 404 (page not found) error when clicking any internal link in WordPress, usually the easiest way to fix the issue is by rebuilding your Permalinks:
WordPress plugins we do not recommend
The WordPress plugins listed here have from our experience caused high system resource usage and are not recommended for use in our shared hosting environments:
I receive a Fatal Error when trying to upgrade WordPress
If you receive a Fatal Error when upgrading WordPress, such as: