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High memory Ram used WordPress

I have a website with high memory Ram used
I have a dedicated server with 16GB and that is at 80% utilization
It has approximately 20,000 daily visits.
It has many comments in the site.
Already tested the Plugin "Quick Cache" and "W3 Total Cache" but does not solve.
There is a plugin to solve the high utilization of memory Ram?

Thank you

Answers (3)


Dbranes answers:

Hi, you can try adding this into your wp-config.php

define('WP_MEMORY_LIMIT', '96M');

(adjust to your value)

You could also try the P3 plugin to profile your plugins:

Also recommend the Debug bar (and it's extensions)

and the Blackbox debug bar:

Memory viewer for your hooks:

Also consider using <strong>nginx</strong> instead of Apache

You should also check what process is using all your memory (i.e. is it apache or mysql or something else)

If it's mysql there is a great script called that can give you hints how to configure it (if you have access to ssh, you can check it with top or htop)

ps: if you have lot's of comment's that are constantly refreshing the cache,
you might also consider using comment services like Facebook / Intense Debate / Disqus / LiveFyre


Francisco Javier Carazo Gil answers:

Hi Jose Ribeiro,

I would use a low level cache, look at this: and also here documentation in Spanish: (there should be more in English) and this plugin:

Francisco Javier Carazo Gil comments:


I have seen your site, maybe you can also try to make your theme lighter:
* Remove all calls to get_bloginfo and make them static (CSS path, site title, site charset, etc.)
* Make HTML as many sites as you can (pages and widget that always have same info)
* Try to make lighter the queries
* Study plugins load:


Michael Caputo answers:

What are your settings for W3 Total Cache like?

I've been working on a site that receives 5x the visits (often all at once) as yours, and we do not have it running on a server with that high of specs...

Have you spoken to your server administrator?