NAME
db4.8_stat - Display statistics for Berkeley DB environments
SYNOPSIS
db4.8_stat -d file [-fN] [-h home] [-P password] [-s database]
db4.8_stat [-cEelmNrtVZ] [-C Aclop] [-h home] [-L A] [-M A] [-R A] [-P
password]
DESCRIPTION
The db4.8_stat utility displays statistics for Berkeley DB
environments.
OPTIONS
-C Display internal information about the locking subsystem. (The
output from this option is often both voluminous and
meaningless, and is intended only for debugging.)
A Display all information.
c Display lock conflict matrix.
l Display lockers within hash chains.
o Display lock objects within hash chains.
p Display locking subsystem parameters.
-c Display locking subsystem statistics, as described in
DB_ENV->lock_stat.
-d Display database statistics for the specified file, as described
in DB->stat.
If the database contains multiple databases and the -s flag is
not specified, the statistics are for the internal database that
describes the other databases the file contains, and not for the
file as a whole.
-E Display internal information about the database environment,
including all configured subsystems of the database environment.
(The output from this option is often both voluminous and
meaningless, and is intended only for debugging.)
-e Display information about the database environment, including
all configured subsystems of the database environment.
-f Display only those database statistics that can be acquired
without traversing the database.
-h Specify a home directory for the database environment; by
default, the current working directory is used.
-l Display logging subsystem statistics, as described in
DB_ENV->log_stat.
-M Display internal information about the cache. (The output from
this option is often both voluminous and meaningless, and is
intended only for debugging.)
A Display all information.
h Display buffers within hash chains.
-m Display cache statistics, as described in DB_ENV->memp_stat.
-N Do not acquire shared region mutexes while running. Other
problems, such as potentially fatal errors in Berkeley DB, will
be ignored as well. This option is intended only for debugging
errors, and should not be used under any other circumstances.
-P Specify an environment password. Although Berkeley DB utilities
overwrite password strings as soon as possible, be aware there
may be a window of vulnerability on systems where unprivileged
users can see command-line arguments or where utilities are not
able to overwrite the memory containing the command-line
arguments.
-R Display internal information about the replication subsystem.
(The output from this option is often both voluminous and
meaningless, and is intended only for debugging.)
A Display all information.
-r Display replication statistics, as described in
DB_ENV->rep_stat.
-s Display statistics for the specified database contained in the
file specified with the -d flag.
-t Display transaction subsystem statistics, as described in
DB_ENV->txn_stat.
-V Write the library version number to the standard output, and
exit.
-Z Reset the statistics after reporting them; valid only with the
-C, -c, -E, -e, -L, -l, -M, -m, -R, -r, and -t options.
Values normally displayed in quantities of bytes are displayed as a
combination of gigabytes (GB), megabytes (MB), kilobytes (KB), and
bytes (B). Otherwise, values smaller than 10 million are displayed
without any special notation, and values larger than 10 million are
displayed as a number followed by "M".
The db4.8_stat utility may be used with a Berkeley DB environment (as
described for the -h option, the environment variable DB_HOME, or
because the utility was run in a directory containing a Berkeley DB
environment). In order to avoid environment corruption when using a
Berkeley DB environment, db4.8_stat should always be given the chance
to detach from the environment and exit gracefully. To cause
db4.8_stat to release all environment resources and exit cleanly, send
it an interrupt signal (SIGINT).
The db4.8_stat utility exits 0 on success, and >0 if an error occurs.
ENVIRONMENT
DB_HOME
If the -h option is not specified and the environment variable
DB_HOME is set, it is used as the path of the database home, as
described in DB_ENV->open.
AUTHORS
Sleepycat Software, Inc. This manual page was created based on the HTML
documentation for db_stat from Sleepycat, by Thijs Kinkhorst
<thijs@kinkhorst.com>, for the Debian system (but may be used by
others).
28 January 2005