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Tuning PHP-FPM Settings
What would recommended / decent / … settings here for a low to moderate Textpattern site? Currently using PHP 8.1.
In particular(as those are the only settings I can modify via the host control panel):
- FPM Max Child Threads
- FPM Max Requests
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Re: Tuning PHP-FPM Settings
Based on this page and calculator linked within, I came up with :
- FPM Max Child Threads: 16
Not sure what decent value for FPM Max Requests, opinion from server genius appreciated. TY.
PS – Server runs Apache (centOS) and there is 1GB RAM available.
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Re: Tuning PHP-FPM Settings
Short of being able to change any and all PHP-FPM settings, I’d suggest leaving the settings as they are and monitoring your PHP error log. I know that’s not a very exciting answer, but instinct says your host has likely tweaked things for the majority of sites to work OK, and you can poke around with the numbers if you encounter an issue.
Unless I’m missing something, the linked calculator doesn’t account for the duration of PHP-FPM being alive, which will impact the calculations.
For what it’s worth, Textpattern project servers use the defaults out of the box, and we’re running on 1GB or 2GB servers typically, albeit with some extra optimisations because I’m a bit…extra.
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Re: Tuning PHP-FPM Settings
Thanks for the feedback. I’d gladly leave to the defaults. The problem I have is when I configure a site through the host’s control panel, I must fill in some value – required field, numeric values,… the whole thing. Hence the question.
I guess I can start with something not-to-greedy and see from there…
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Re: Tuning PHP-FPM Settings
phiw13 wrote #333888:
I guess I can start with something not-to-greedy and see from there…
Have a look here: github.com/php/php-src/blob/master/sapi/fpm/www.conf.in
Locate the pm.* entries, and crib the defaults. The relevant part starts at line #84 (see github.com/php/php-src/blob/master/sapi/fpm/www.conf.in#L84).
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Re: Tuning PHP-FPM Settings
gaekwad wrote #333895:
Have a look here: github.com/php/php-src/blob/master/sapi/fpm/www.conf.in
Locate the
pm.*entries, and crib the defaults. The relevant part starts at line #84 (see github.com/php/php-src/blob/master/sapi/fpm/www.conf.in#L84).
Thanks. I’ll have a look and start experimenting.
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