How to fix this error?

[Jonatan442]

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?

 

[pleskpanel]

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.

 

[Jonatan442]

Thanks for your answer.
My website is not Wordpress. My site is powered by Question2Answer.
There is something in Plesk can help out?