Cache grows without limit and overloads MySQL
The cache table keeps growing without limit on large sites, bloating the database and pushing MySQL CPU to its maximum.
Tier II · Emerging Problems that are still building up.
3 public reports · first reported 19 October 2019 · last reported 28 July 2026
What's going wrong
WP REST Cache users running large WooCommerce and content sites report that the cache keeps growing without limit.
AI-assisted: written with the help of AI from the reports. The idea report has the full summary.
In the idea report
- The full summary.
- The products the 3 reports are about, and how many came each month.
- Related problems.
No business has been found with this problem yet, so the report has no contacts. All sales are final — no refunds. Pricing.