Exadata log switches twice in every hour however archive_lag_target=0

Hi

Oracle 19.16, exadata

I am playing around with exadata (image 22.1), and I have noticed something strange.

I can see that log switches are occurring at least twice per hour, so seems like the below parameter is set to 1800, but it is not.

SQL> show con_name
CON_NAME
------------------------------
CDB$ROOT
SQL> show parameter archive_lag_target
NAME                        TYPE      VALUE
--------------------------------------------------
archive_lag_target                 integer     0

Log switches:

Although, this behavior (at least 2 log switches per hour) is welcomed, my question is, what triggers these log switches..?

Regards

Raul