https://mailman.nginx.org/pipermail/nginx-devel/2015-September/007263.html
[nginx] Decreased the NGX_HTTP_MAX_SUBREQUESTS limit.
nginxdecreasedngxhttpmax
https://www.drupal.org/project/subrequests
Subrequests | Drupal.org
May 11, 2022 - Tell the system to execute several requests in a single bootstrap. Then return all the things. NOTE: Version 2 has been released and will unleash much more...
drupal