Users are disconnected in 5/6 minutes - symfony

Question

With Symfony 3.3.16, my users are disconnected in 5/6 minutes. I don't understand.
This problem is only in production (OVH), not in dev.
session.gc_maxlifetime : 1440
security.yml :
security:
encoders:
AppBundle\Entity\User: bcrypt
providers:
database_users:
entity:
class: AppBundle\Entity\User
firewalls:
dev:
pattern: ^/(_(profiler|wdt)|css|images|js)/
security: false
main:
pattern: ^/
anonymous: true
simple_form:
username_parameter: _email
authenticator: AppBundle\Security\Authenticator
check_path: login
login_path: login
success_handler: AppBundle\Handler\AuthenticationSuccessHandler
logout:
path: logout
handlers: [AppBundle\Handler\LogoutHandler]
success_handler: AppBundle\Handler\LogoutSuccessHandler
access_control:
- { path: '^/administration', roles: ROLE_ADMIN }
- { path: '^/user', roles: ROLE_USER }
Can you help me ?

Answer 1

In the symfony configuration reference, you can configure the session lifetime setting:
cookie_lifetime
This determines the lifetime of the session - in seconds. The default
value - null - means that the session.cookie_lifetime value from
php.ini will be used. Setting this value to 0 means the cookie is
valid for the length of the browser session.
gc_maxlifetime
This determines the number of seconds after which data will be seen as "garbage" and potentially cleaned up. Garbage collection may occur during session start and depends on gc_divisor and gc_probability.
Check their value in the config.yml and config_prod.yml
I understand you have already checked the the value of the php.ini value session.gc_maxlifetime