Four Misconfigurations Behind Most WordPress Sitewide Outages, Ranked by Recovery Time

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The vast majority of WordPress sitewide outages stem from just four misconfigurations: a plugin or theme update triggering a PHP fatal error, PHP resource limits set too low, a database failure due to MySQL hitting its limits or a full disk, and incorrect wp-config or site URL values. Recovery time, rather than frequency, is the more useful way to rank these failures, as the most common issue is also the easiest to fix, while rare InnoDB corruption on a full disk typically requires a full backup restore. Because wp-admin is usually unavailable during a sitewide outage, command-line tools like WP-CLI are often the fastest recovery path. Key preventive measures vary by user type — from locking down plugin auto-updates on shared family sites to isolating PHP-FPM pools per site for freelancers managing multiple installs. Every safeguard that prevents a bad change from causing an outage comes with a trade-off: added friction to routine site management.

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