What does __db.001 mean in Berkeley Database?

Question

i'm using berkeley db and i'm new to it. I have noticed that whenever i start the berkeley the file " __db.001" is created in my directory and it consists of 1 line

May you please explain to me what is the use of that file?

Thanks, in advance

Answer 1

These files are used by Berkeley DB internally by the shared environment (DBEnv) to coordinate multi-process access to the database.

See also ___db.001