Out of memory on /admin/reports/redis

Created on 6 October 2025, 17 days ago

Problem/Motivation

When visiting /admin/reports/redis, error 500 is returned with the following error:

Error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 20480 bytes)
at /modules/contrib/redis/src/Controller/ReportController.php at line 136

This is a bit problematic since this makes it hard to analyze Redis status and improve our caching strategies.

Steps to reproduce

Have a production website with a 3GB Redis memory limit. Using php-fpm with a 256M limit per worker.

Initially, the reports page works, but as soon as the caches warm up, the page stops working.

Related: https://www.drupal.org/project/redis/issues/3550371#comment-16292727 💬 How to improve cache hit ratio/what is good hit ratio Active

🐛 Bug report
Status

Active

Version

1.10

Component

Code

Created by

🇸🇮Slovenia KlemenDEV

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