storageDatabase•hourglass_bottomTimeouterrorerrordatabasedatabasememorymemory_limit•star_halfUncommon•warningModerate

LONG QUERY

WordPress logs a LONG QUERY error when a database statement runs longer than the allowed threshold. The platform records the duration, the SQL text, and the request URL.

Long queries increase CPU usage and memory pressure. They also delay page rendering and will trigger timeout messages.

Symptoms

[dashicons-clock]

Slow page loads

Pages take more than two seconds to render, spinner stays visible.

[dashicons-warning]

Database connection timeout

Browser shows error establishing a database connection after a long wait.

[dashicons-admin-site]

White screen of death

Page returns blank output with no error message.

[dashicons-admin-tools]

Admin bar query warning

Admin bar displays a notice: a database query took several seconds.

Common Causes

Missing indexes

Query fails to use an index and performs a full table scan.

Inefficient SELECT statements

SELECT without WHERE or LIMIT forces scan of millions of rows.

Heavy plugin code

Plugin generates meta queries returning large result sets.

Resource contention

CPU or I/O limits slow query execution even for optimized statements.

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