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I need to change "max_children setting" but php-hpm.conf file can't be found on server?

HeyHost

Hi, I get a lot of these errors for a lot of domains.
[pool domain_com] server reached max_children setting (5), consider raising it
So I need to change "max_children setting" but php-hpm.conf file can't be found on server?
My system:
OS
AlmaLinux v8.9.0 STANDARD hyper-v
cPanel Version
110.0.17

Where can I find this file?

Comments

5 comments

Date Votes
  • cPAdminsMichael

    Hi!

    You can change the max_children setting from the MultiPHP Manager in WHM

    0
  • HeyHost

    Thank you.
    I have changed the global value but I see the message:
    System PHP-FPM setting applies to only new account creations.
    Will my new setting work on the domains that are already on the WHM?

    0
  • cPRex Jurassic Moderator

    HeyHost - can you let me know specifically where you're seeing that message?  When I go to WHM >> MutliPHP Manager, and click the "Manage Settings" button next to the PHP-FPM option, I don't see that "only new account" warning when I save the change.  The only reference I can find for that text is when you disable PHP-FPM, as mentioned here:

    https://support.cpanel.net/hc/en-us/articles/360056146193-How-to-switch-from-PHP-FPM-to-the-LSAPI-handler

    so it would be good to have some context as to where you're seeing that.

    0
  • vander.host

    I'm going to raise this 1 year old post back up again because I'm having problems with PHP-FPM on one server. The server has many websites and only intermittently fails, maybe twice a month. The symptoms are sites simply stop serving. The obvious place to check is:

    service httpd status

    ..but there the interesting thing is Apache is running. Simply restarting `httpd` makes the server work again.

    So lots of time and research had led me to believe it's PHP-FPM that bombs out. After a while I found this log file:

    [root@server ~]# cat /opt/cpanel/ea-php83/root/var/log/php-fpm/error.log | grep "reached" | more
    [01-Jun-2025 00:05:21] WARNING: [pool site1_com] server reached max_children setting (5), consider raising it
    [01-Jun-2025 00:05:37] WARNING: [pool site2_com] server reached max_children setting (5), consider raising it
    [01-Jun-2025 00:06:12] WARNING: [pool site3_com] server reached max_children setting (5), consider raising it

    Out of all the busy sites on the server, I know for a fact the sites mentioned are really busy.

    So what next? Well, let's look at the children in MultiPHP Manager:

    There it is. I'll raise it from 5 to 6 and see how things go. But still, I can't believe a PHP-FPM service would cause an Apache to completely stop serving sites without any others output from a PHP-FPM that's broken.

    0
  • cPRex Jurassic Moderator

    I also wouldn't expect an FPM issue to break all the sites on the machine.  What shows up in the main Apahe log (/etc/apache2/logs/error_log) when the issue starts?  It would also be good to check the output of "apachectl status" as that should show what Apache is doing in real time.

    0

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