Add PHP and locking memcache with APCu and Redis for Nextcloud

pages/02.linux/nextcloud/default.en.md

@@ -121,6 +121,44 @@ systemctl restart apache2
 
 [/shroot]
 
+### PHP Memory Cache
+
+[shroot]
+
+```sh
+apt install php-apcu
+```
+
+[/shroot]
+
+```php
+'memcache.local' => '\OC\Memcache\APCu',
+```
+
+### Redis memcache
+
+[shroot]
+
+```sh
+apt install redis php-redis
+```
+
+[/shroot]
+
+If Redis is installed on the same machine, unix sockets can be used to communicate.
+
+Add these lines to `config.php`
+
+```php
+'filelocking.enabled' => true,
+'memcache.locking' => '\OC\Memcache\Redis',
+'redis' => array(
+    'host' => '/var/run/redis/redis.sock',
+    'port' => 0,
+    'timeout' => 0.0,
+),
+```
+
 ### Cron
 
 To execute regular jobs, I personally use cron.