NAME

       mdb_stat - LMDB environment status tool

SYNOPSIS

       mdb_stat [-V] [-e] [-f[f[f]]] [-n] [-r[r]] [-a | -s subdb]  envpath

DESCRIPTION

       The mdb_stat utility displays the status of an LMDB environment.

OPTIONS

       -V     Write the library version number to the standard output, and exit.

       -e     Display information about the database environment.

       -f     Display  information  about  the  environment  freelist.  If -ff is given, summarize each freelist
              entry.  If -fff is given, display the full list of page IDs in the freelist.

       -n     Display the status of an LMDB database which does not use subdirectories.

       -r     Display information about the environment reader table.  Shows the  process  ID,  thread  ID,  and
              transaction  ID for each active reader slot. The process ID and transaction ID are in decimal, the
              thread ID is in hexadecimal. The transaction ID is  displayed  as  "-"  if  the  reader  does  not
              currently  have  a  read transaction open.  If -rr is given, check for stale entries in the reader
              table and clear them. The reader table will be printed again after the check is performed.

       -a     Display the status of all of the subdatabases in the environment.

       -s subdb
              Display the status of a specific subdatabase.

DIAGNOSTICS

       Exit status is zero if no errors occur.  Errors result in a non-zero exit status and a diagnostic message
       being written to standard error.

SEE ALSO

       mdb_copy(1)

AUTHOR

       Howard Chu of Symas Corporation <http://www.symas.com>