https://www.mongodb.com/docs/manual/reference/command/dbstats/
dbStats (database command) - Database Manual - MongoDB Docs
Retrieve storage statistics for a database using the `dbStats` command, including options for scaling and free storage details.
command manualdbstatsdatabasemongodbdocs
https://www.r-project.org/nosvn/R.check/r-devel-linux-x86_64-fedora-gcc/dbstats-00check.html
Check results for 'dbstats'
check resultsdbstats