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APCu

Version check​

You can check the version of APCu installed with the command:

~]# rpm -qa | grep -i apcu
php-pecl-apcu-5.1.17-1.el7.remi.7.2.x86_64

Module check​

You can confirm the module has been loaded:

~]# php -m | grep -i APCu
apcu

Flush APCu​

Service reload​

You can flush APCu with a reload of the PHP-FPM service, always run a configuration test before reloading:

~]# php-fpm -t
[19-Aug-2019 08:48:54] NOTICE: configuration file /etc/php-fpm.conf test is successful
~]# systemctl reload php-fpm

PHP function​

You can also clear APCu using the PHP function:

<?php
 if (extension_loaded('apcu')) {
    echo "APCu cache: " . apcu_clear_cache() . "\n";
 }
?>

APCu settings​

We use the following sed to change the default settings of APCu on our Shopware stacks:

sed -i 's/;apc.shm_size=32M/apc.shm_size=512M/g' /etc/php.d/*apcu.ini