Disable Memcached use

Support intro

Hello, on my Webserver is Memcached set for a diffrent application.
For some reason Nextcloud automatically wants to use the set up Memcached without any configuration in config.php
I’m getting a LOT of errors in the log.

How can I disable the use of Memcached? I really don’t need this performance.

Thank you very much in advance

Nextcloud version 14.0.1
Operating system and version Ubuntu 17.04
Apache or nginx version Apache 2.4.25
PHP version 7.1.10
MySQL version 5.6.19

The issue you are facing:
In the log I’m getting a lot of
Error PHP Startup: Unable to load dynamic library ‘…/memcache.so’ - …/memcache.so: cannot open shared object file: Permission denied at Unknown#0

Is this the first time you’ve seen this error? Yes

Steps to replicate it:
It is permanent. The more as I do on Nextcloud

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

$CONFIG = array (
  'instanceid' => '...',
  'passwordsalt' => '...',
  'secret' => '...',
  'trusted_domains' => 
  array (
    0 => '...',
  'datadirectory' => '.../data',
  'overwrite.cli.url' => '...',
  'dbtype' => 'mysql',
  'version' => '',
  'dbname' => '...',
  'dbhost' => '...',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'mysql.utf8mb4' => true,
  'dbuser' => '...',
  'dbpassword' => '...',
  'installed' => true,
  'maintenance' => false,
  'updater.secret' => '...',
  'theme' => '',
  'loglevel' => 2,

For a fluid interface, the caching is somehow required (not really but it speeds up things). Did it work before and it is related to an upgrade (of NC, php or OS)?