How to ensure redis is working fine with nextcloud?

I have fresh install of nextcloud, I already had redis installed up and running from previous installation, so I added the config to make use of redis but I am not getting any performance improvements.

Here is my config:

<?php
$CONFIG = array (
  'memcache.local' => '\\OC\\Memcache\\Redis',
  'filelocking.enabled' => 'true',
  'memcache.distributed' => '\\OC\\Memcache\\Redis',
  'memcache.locking' => '\\OC\\Memcache\\Redis',
  'redis' => 
  array (
    'host' => '192.168.1.20',
    'port' => 7001,
    'timeout' => 0.0,
    'password' => '',
    'dbindex' => 0,
  ),

  'trusted_domains' => 
  array (
    0 => '192.168.1.20',
  ),
  'datadirectory' => '/mnt/storage/data',
  'dbtype' => 'mysql',
  'version' => '24.0.2.1',
  'overwrite.cli.url' => 'https://192.168.1.20/nextcloud',
  'dbname' => 'nextcloud',
  'dbhost' => 'localhost:3306',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'dbuser' => 'user',
  'dbpassword' => 'secretPassword!',
  'installed' => true,
  'session_lifetime' => 86400,
  'session_keepalive' => true,
  'has_rebuilt_cache' => true,
);

maybe you find an answer after little search in this forum e.g.