Add workers to PHP5.6 Pool

Good day,

Ref : Server: (Ubuntu 20.04.5 LTS (Focal Fossa)) ISPConfig 3.2.9p1
PS: I will probably update ISPConfig with there modifications...

Thi is a bit out of scope for ISPConfig, and more a 'How to pimp up the Perfect Server', but I'd like to know if it's possible to add more workers in the PHP ini overides of a project (Option / Custom php.ini settings)?
I don't see anything in the /etc/php/5.6/cgi/php.ini file? An it probably should be done here?

Background:
I have 2 applications running on the server (LAMP) with ISPConfig. A front end with PHP7.3 and a back end API on PHP5.6 both runnning in Fast-CGI mode.

There are a few times a week the php5.6 API stops responding (for a minute or two), but ISPConfig answers during this time and so does the front end. I guess Apache and PHP7.3 are OK. Thant's why i'm suspecting a lack of workers on the API (PHP5.6) side. I understand this service does many calls of it's own to external API's and many processes are left waiting...

- I will double de machine (EC2 to 4 vCPU and 16G Ram) and want to know if I can double the workers (pool) for the PHP5.6 API? At least add more. Could you recommend the best way to do this?
- Also if I do this, should I add some Apache workers (max) int hte Apache overrides or config of the server? What would you recommend (in /etc/apache2/apache2.conf) ?

As always, thatks ahead,

JP

 

Till,

So you kinda confirm there's not much more to do with Fast-CGI, right? PHP-FPM5 would be the recommended way to go.
I guess I can do a test with the Staging environment with the developer on PHP-FPM5.6.

What about Apache, should I grow it if I grow PHP-FPM? Wouldn't want to afect the rest of the sites (front end and ISPConfig)
I found something on ServerFault that goes like this (with a mpm module) :

• Something like /etc/httpd/conf.modules.d/10-worker.conf:
  <IfModule mpm_worker_module>
  ServerLimit 250
  StartServers 10
  MinSpareThreads 75
  MaxSpareThreads 250
  ThreadLimit 64
  ThreadsPerChild 32
  MaxClients 8000
  MaxRequestsPerChild 10000
  </IfModule>

Obviously these values need to be tested in my environment, but, for example, something like 'StartServers' defaults to 3, if not configured, I believe.

Would you recommend anything like that as an addon for the Prefect Setup and ISPConfig? I don't want to mess up the server and other versions of PHP. Maybe I don't need this mpm module and on a wrong track?

Thanks,

JP​

 

I did some reading and I seem to understand that this can be tweaked in php-fpm:
/etc/php/5.6/fpm/pool.d/www.conf

I see many pm.* params I can set (ex: pm.max_children = 5, pm.start_servers = 2...)

Thanks to your feedback, I think I have a plan.

Thanks again,

JP