What is mnesia:info/0 used for?

mnesia:info/0 prints a human-readable summary of the running Mnesia system directly to the shell: which tables exist, their sizes, storage types, which nodes hold copies, and general system status — a quick way to sanity-check the state of the database without writing any query code.

1> mnesia:info().
---> Processes holding locks <---
---> Processes waiting for locks <---
---> Participant transactions <---
...
Table Type Size ...

It's mainly a diagnostic/debugging tool used interactively in a shell session, not something application code calls programmatically — for structured, code-level introspection of a specific table, you'd use mnesia:table_info/2 instead, which returns a specific piece of information you can pattern match on or act on programmatically.

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