The "dbstat" command:

Usage: fossil dbstat OPTIONS

Shows statistics and global information about the repository and/or verify the integrity of a repository.

Options:

-b|--brief
Only show essential elements
--db-check
Run "PRAGMA quick_check" on the repository database
--db-verify
Run a full verification of the repository integrity. This involves decoding and reparsing all artifacts and can take significant time.
--omit-version-info
Omit the SQLite and Fossil version information