2017-01-11 22:39:08 +08:00
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.TH MDB_STAT 1 "2015/09/30" "LMDB 0.9.17"
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2021-01-12 03:21:58 +08:00
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.\" Copyright 2012-2021 Howard Chu, Symas Corp. All Rights Reserved.
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2012-12-20 05:09:56 +08:00
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.\" Copying restrictions apply. See COPYRIGHT/LICENSE.
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.SH NAME
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mdb_stat \- LMDB environment status tool
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.SH SYNOPSIS
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.B mdb_stat
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[\c
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2014-06-20 20:33:31 +08:00
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.BR \-V ]
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[\c
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2012-12-20 05:09:56 +08:00
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.BR \-e ]
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[\c
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2013-02-17 02:07:16 +08:00
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.BR \-f [ f [ f ]]]
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2012-12-20 05:09:56 +08:00
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[\c
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.BR \-n ]
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[\c
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2013-07-19 01:40:21 +08:00
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.BR \-r [ r ]]
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2013-07-18 22:41:11 +08:00
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[\c
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2012-12-20 05:09:56 +08:00
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.BR \-a \ |
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.BI \-s \ subdb\fR]
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2015-10-01 01:11:20 +08:00
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.BR \ envpath
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2012-12-20 05:09:56 +08:00
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.SH DESCRIPTION
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The
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.B mdb_stat
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utility displays the status of an LMDB environment.
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.SH OPTIONS
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.TP
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2014-06-20 20:33:31 +08:00
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.BR \-V
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Write the library version number to the standard output, and exit.
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.TP
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2012-12-20 05:09:56 +08:00
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.BR \-e
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Display information about the database environment.
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.TP
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.BR \-f
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2013-02-17 02:07:16 +08:00
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Display information about the environment freelist.
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If \fB\-ff\fP is given, summarize each freelist entry.
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If \fB\-fff\fP is given, display the full list of page IDs in the freelist.
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2012-12-20 05:09:56 +08:00
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.TP
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.BR \-n
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Display the status of an LMDB database which does not use subdirectories.
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.TP
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2013-07-18 22:41:11 +08:00
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.BR \-r
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Display information about the environment reader table.
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Shows the process ID, thread ID, and transaction ID for each active
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reader slot. The process ID and transaction ID are in decimal, the
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thread ID is in hexadecimal. The transaction ID is displayed as "-"
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if the reader does not currently have a read transaction open.
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2013-07-19 01:40:21 +08:00
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If \fB\-rr\fP is given, check for stale entries in the reader
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table and clear them. The reader table will be printed again
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after the check is performed.
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2013-07-18 22:41:11 +08:00
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.TP
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2012-12-20 05:09:56 +08:00
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.BR \-a
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Display the status of all of the subdatabases in the environment.
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.TP
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.BR \-s \ subdb
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Display the status of a specific subdatabase.
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.SH DIAGNOSTICS
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Exit status is zero if no errors occur.
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Errors result in a non-zero exit status and
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a diagnostic message being written to standard error.
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.SH "SEE ALSO"
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.BR mdb_copy (1)
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.SH AUTHOR
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Howard Chu of Symas Corporation <http://www.symas.com>
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