eZ Publish sessions are handled by the Symfony stack, through session handlers. As en example, in order to store your session data in a database, you may use the PdoSessionHandler:
framework:
session:
# ...
handler_id: session.handler.pdo
parameters:
pdo.db_options:
db_table: session
db_id_col: session_id
db_data_col: session_value
db_time_col: session_time
services:
pdo:
class: PDO
arguments:
dsn: "mysql:dbname=<mysql_database>"
user: <mysql_user>
password: <mysql_password>
session.handler.pdo:
class: Symfony\Component\HttpFoundation\Session\Storage\Handler\PdoSessionHandler
arguments: ["@pdo", "%pdo.db_options%"]
For more information on this and other included handlers, or information on developing your own, please check the online Symfony documentation.
To configure sessions in your eZ Publish 5.2 setup, look to the documentation of Symfony HTTP Fundation component.