This will depend on your configuration. 

In Trial mode, odoo.sh will give you 1GB, I worker, and 2 Staging. You will be restricted to this specification.

In Subscribed mode, at least 1 worker, 1 staging, and 1GB are compulsory. You can scale up any of the specifications as desired. 

Hi,

The server configuration details can be visible from settings,it shows memory(database size),database workers and corresponding details of a sh project.

odoo.sh > Open the Project > Settings 

Hope it helps