PHP Memory Question how to adjust

Question

Hello, 

i have been looking on this url https://webinoly.com/en/documentation/webinolys/ it is shared here how to increase WP_MAX_MEMORY_LIMIT that is the commend php-max-mem to be included on /opt/webinoly/webinoly.conf however my question is how could i add WP_MEMORY_LIMIT ? is there a config for this?
 

• WP_MEMORY_LIMIT = front end
• WP_MAX_MEMORY_LIMIT = back end ( admin things )

Comments

Just for the record, I don't know where you read, but Webinoly docs never mention anything about WP memory variables.

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https://webinoly.com/en/documentation/webinolys/

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And where do you see the WP prefix (variables) you mentioned before?

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Do you mean variable WP_MEMORY_LIMIT? that is my question since  WP_MAX_MEMORY_LIMIT variable is php-max-mem in /opt/webinoly/webinoly.conf 

I was thinking if I would be increasing WordPress WP_MEMORY_LIMIT? is there a config for this? a user named handpressed answer is a workable solution but I was just wondering if there is a global configuration for this so we don't need to edit wp-config.php for all sites every time

Thanks,

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First of all, WP_MAX_MEMORY_LIMIT is NOT the same as php-max-mem, Webinoly docs never mention it.

And no, I don't know how to define server-wide WordPress variables.

Here is a link to a short and good explanation: 

https://decrypto.net/the-difference-between-wp_memory_limit-and-wp_max_memory_limit/

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thanks for the response, yes that's the same guide I check before I post this question, 

and with regards to your statement that WP_MAX_MEMORY_LIMIT and php-max-mem are not the same, uhm but looks like it has the same function or let's say effect? ( could you please elaborate why this is so? )

screenshot from server

screenshot from wordpress

what I have been trying to solve and asked if it's possible to set this WP LIMIT to higher value ( to all sites via webinoly )

currently only achievable by adding on define( 'WP_MEMORY_LIMIT', '128M' ); wp-config.php file, mannually per site.. 

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Why do you feel there's a need to increase PHP memory usage globally for every WordPress site on your server? In my 15 years of using and developing with WordPress, I haven't had to worry about the WP_MEMORY_LIMIT setting that often. Surely it's an advantage to have such fine grain control over each site's PHP memory usage? I think so anyway.

From the post linked above:

As is often the case with computing resources, setting a higher memory limit doesn’t necessarily increase the performance of your WordPress site. Since WP_MEMORY_LIMIT controls memory allocation PER SCRIPT, it’s actually in your best interest to set it as low as possible to reduce the chance of a rogue script saturating the RAM in your server.

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Documentation is very clear, also you can read the WordPress Codex about this topic.

• wp_memory_limit is for each WP script (PHP).
• wp_max_memory_limit is specifically for the WP admin area.
• PHP memory_limit (php-max-mem) is for any PHP script running in your server. WP variables are limited by this one.

As you can see, they are three very different things.

Regards.

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Ok, I do understand your point, 

what i simply express on this inquiry is wp_memory_limit is wordpress wp-config variable and as wordpress utilized PHP so it still relies to memory_limit (php-max-mem) settings on the server so whatever changes applied to global PHP settings php-max-mem will be applicable to all wordpress unless limited by a variable in wp-config by wp_memory_limit, 

we place it that these 3 variables are different, yes that is a correct argument however both wp_memory_limit and memory_limit share the same purpose, 

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I understand, but I choose not to discuss the reason here on this thread as it would be out of topic, has something to do with WooCommerce optimization

Why do you feel there's a need to increase PHP memory usage globally for every WordPress site on your server? In my 15 years of using and developing with WordPress, I haven't had to worry about the WP_MEMORY_LIMIT setting that often. Surely it's an advantage to have such fine grain control over each site's PHP memory usage? I think so anyway.

Answer 1

You can increase the WP_MEMORY_LIMIT for individual sites by adding a constant to the site's wp-config.php file, e.g.:

define( 'WP_MEMORY_LIMIT', '128M' );

What's the difference between WP_MEMORY_LIMIT and WP_MAX_MEMORY_LIMIT?

Comments

thank you, this could be a workaround, I hope there is a server-wide way :(