Question Dedicated FPM application and subdomains

[Patashoow]

Server operating system version

Ubuntu 20.04

Plesk version and microupdate number

Plesk Obsidian 18.0.60

Hello,

In Home > Domains > PHP settings, if I set the "run PHP as" option to "Dedicated FPM application...", will that setting also be applied to all subdomains?

I have multiple subdomains on my website and I was previously using shared FPM with the value "FPM application served by Apache" but when I updated that value for the main domain (domain.tld) to be dedicated and checked "sub1.domain.tld" and "sub2.domain.tld", the old value is still there.
So will every subdomain have its own dedicated pool or will it be applied for the whole website?

 

[Kaspar@Plesk]

In Home > Domains > PHP settings, if I set the "run PHP as" option to "Dedicated FPM application...", will that setting also be applied to all subdomains?

The PHP handler only applies to that specific domain. So the handler for sub domain aren't changed.

I have multiple subdomains on my website and I was previously using shared FPM with the value "FPM application served by Apache" but when I updated that value for the main domain (domain.tld) to be dedicated and checked "sub1.domain.tld" and "sub2.domain.tld", the old value is still there.
So will every subdomain have its own dedicated pool or will it be applied for the whole website?

By default a shared pool is used, however each domain has it's own PHP settings. When a dedicate PHP handler is used the domain runs in a completely separate pool.

 

[Patashoow]

Thank you for the clarifications.

So just to be 100% sure, if I for example set a dedicated pool for the main domain and every subdomain and then repeat the same settings for the process manager to be static with 100 child processes, I will have 100+(number_of_subdomains x 100) permanent child processes right?

 

[Patashoow]

I have one other maybe stupid question but are the shared pools only shared by the domain and all its subdomains or are they shared by the whole server?

If for example my server hosts domain.tld (with sub-1.domain.tld & sub-2.domain.tld) and other-domain.tld (with sub.other-domain.tld), when I set the "run PHP as" option to "FPM application served by Apache" (not dedicated) for both domain.tld and other-domain.tld, does that mean that domain.tld and other-domain.tld and all their subdomains share the same pool or each domain with its subdomains has its own pool?