I would prefer to install redis and add the following lines to your config.php.
array (
‘host’ => ‘/var/run/redis/redis-server.sock’,
‘port’ => 0,
‘timeout’ => 1.5,
‘dbindex’ => 0,
),
Plz have a look at this one here: https://docs.nextcloud.com/server/latest/admin_manual/installation/server_tuning.html#using-redis-based-transactional-file-locking