Practical engineering runbooks, terminal benchmarks, and code fixes categorized under WordPress.
WordPress loads every single row marked with autoload='yes' into server memory on every HTTP request. Here is how abandoned plugin transients inflate this table past 50MB, causing 2-second TTFB delays, and the SQL queries to clean it safely.
Why WooCommerce fires a heavy, uncached admin-ajax request on every page load, how it sabotages your TTFB and Core Web Vitals, and the surgical script to disable it safely whilst keeping cart totals accurate.
Why raising WP_MEMORY_LIMIT to 512M is only a temporary band-aid, how unbounded WP_Query loops leak memory during REST API and batch webhook calls, and the surgical generator pattern to fix it.
A forensic guide to resolving Redis connection timeouts, transient locking contention, and memory exhaustion that slow down WooCommerce checkouts.