• The APS Catalog has been deprecated and removed from all Plesk Obsidian versions.
    Applications already installed from the APS Catalog will continue working. However, Plesk will no longer provide support for APS applications.
  • Please be aware: with the Plesk Obsidian 18.0.78 release, the support for the ngx_pagespeed.so module will be deprecated and removed from the sw-nginx package.

How to fix this error?

Jonatan442

Basic Pleskian
ERROR: Allowed memory size of 268435456 bytes exhausted (tried to allocate 55057976 bytes) (Show.php:217)

Some plug my site should be consuming a lot of resources. How can I find out how much memory each plugin is consuming?
 
Assuming that you can still load your website (and that you're referring to WordPress), please try installing https://wordpress.org/plugins/p3-profiler/ which is a decent baseline investigative tool.

With basic WordPress websites it's sometimes possible track severe performance issues down to a single plugin or plugins.
 
Thanks for your answer.
My website is not Wordpress. My site is powered by Question2Answer.
There is something in Plesk can help out?
 
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