I have Wordpress running on a Ubuntu 20.04 server with Nginx and PHP 7.4. When trying to generate a feed (by going to a feed URL such as /category/feed) , I receive the following error:
2020/09/11 18:51:26 [error] 4446#4446: *5 FastCGI sent in stderr: "PHP message: PHP Fatal. error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 262144 bytes) in /var/www/wp-includes/wp-db.php on line 1251PHP message: PHP Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 262144 bytes) in Unknown on line 0PHP message: PHP Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 262144 bytes) in Unknown on line 0" while reading response header from upstream, client: x.x.x.xx, server: www...., request: "GET /category/feed HTTP/1.1", upstream: "fastcgi://unix:/var/run/php/php7.4-fpm.sock:", host: "www...."
I have tried to increase the memory limit on PHP to higher than 256M but this does not resolve the issue.
What could be the problem?
