:renew: When true, generates a new session id for the cookie
However, it seems that my browser cookie does not contain a session ID equivalent.
Perhaps this description is out of date and in fact this option has no effect on the cookie.
Yes. The session ID is stored in the cookie and the content is stored in the ETS table. Note that:
We don’t recommend using this store in production as every session will be stored in ETS and never cleaned until you create a task responsible for cleaning up old entries.
Also, since the store is in-memory, it means sessions are not shared between servers. If you deploy to more than one machine, using this store is again not recommended.
This store, however, can be used as an example for creating custom storages, based on Redis, Memcached, or a database itself.