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Add environment var to set apc.shm_size php config #2462
Description
When I got the warning that the apc.shm_size is almost full It took me a long time to figure out how to cleanly fix it in docker and where the config PHP is stored.
It feels a bit odd to me that a setting that the docs recommend to change requires me to figure out where the PHP config dir is and add a file to it.
I would suggest adding a PHP_APC_SHM_SIZE environment variable similar to PHP_UPLOAD_LIMIT.
Reacted by b-a0, p7kdev, a-petrovich, Henrique Custódio, Felicia Hummel, PolGZ, Sascha Brockel, Matthew Wells, isdnfan, Marc Urben and 2 more
Activity
[-]Add enviroment var to set `apc.shm_size`[/-][+]Add environment var to set `apc.shm_size` php config[/+]saschabrockel commentedon Nov 22, 2025
Agreed. I have no idea where the correct
php.iniis.cpunk commentedon Dec 14, 2025
And which file was the right one to edit this option?
cpunk commentedon Dec 18, 2025
I added the line
apc.shm_size=128Mto the file
/etc/php/8.2/cli/conf.d/20-apcu.inidid a
systemctl restart php8.2-fpm.serviceand the warning disappeared. It would have been really nice if there had been a note about this somewhere.
oxivanisher commentedon Jul 24, 2026
I get this warning now too. This would be really nice if its configurable as a environment variable.