Re: MaxDBs

Ben Johnson writes:

Is there an upper limit to mdb_env_set_maxdbs()?

In theory INT_MAX or memory limits (see below), not that it'd be a good idea to go that high.

And what's the overhead for adding additional DBs?

Around 60 bytes malloc & init overhead per DB for each txn and env, or half that on a 32-bit machine. Also time to scan some of that memory now and then.

Can I change this number once it's set if I close and reopen the env?

Yes. It only affects the MDB_env structure, not the database.