Memory settings for Oracle

Hello,

I have 256 G of physical memory and two Oracle 19.20 instances with following setup on Prod:

sga_target=0;

sga_max_size=0

pga_aggregate_target=0

memory_target=168G

memory_max_target=184G

After few days in production I see following parameters there:

NAME                 TYPE    VALUE

------------------------------------ ----------- ------------------------------

pga_aggregate_limit         big integer 184G

sga_max_size             big integer 102912M

I assume that pga_aggregate_limit was taken from memory_max_target as I did not set it up.

sga_max_size shows 100 GB so I assume it is set according to current dynamic value. (I set it to 0 during configuration).