1DB_CHECKPOINT(1)             BerkeleyDB Utilities             DB_CHECKPOINT(1)
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NAME

6       db_checkpoint - Periodically checkpoint transactions
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SYNOPSIS

9       db_checkpoint  [-1Vv] [-h home] [-k kbytes] [-L file] [-P password] [-p
10       min]
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DESCRIPTION

13       The db_checkpoint utility is a daemon process that monitors  the  data‐
14       base  log,  and periodically calls DB_ENV->txn_checkpoint to checkpoint
15       it.
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OPTIONS

18       -1     Checkpoint the log once, regardless of whether or not there  has
19              been activity since the last checkpoint and then exit.
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21       -h home
22              Specify  a  home  directory  for  the  database  environment; by
23              default, the current working directory is used.
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25       -k kbytes
26              Checkpoint the database at least as often as every kbytes of log
27              file are written.
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29       -L file
30              Log  the execution of the db_checkpoint utility to the specified
31              file in the following format, where ### is the process  ID,  and
32              the date is the time the utility was started.
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34              db_checkpoint: ### Wed Jun 15 01:23:45 EDT 1995
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36              This  file  will  be  removed if the db_checkpoint utility exits
37              gracefully.
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39       -P password
40              Specify an environment password.  Although Berkeley DB utilities
41              overwrite  password  strings as soon as possible, be aware there
42              may be a window of vulnerability on systems  where  unprivileged
43              users  can see command-line arguments or where utilities are not
44              able to overwrite the memory containing the  command-line  argu‐
45              ments.
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47       -p min Checkpoint  the database at least every min minutes if there has
48              been any activity since the last checkpoint.
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50       -V     Write the library version number to  the  standard  output,  and
51              exit.
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53       -v     Write  the  time of each checkpoint attempt to the standard out‐
54              put.
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56       At least one of the -1, -k, and -p options must be specified.
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58       The db_checkpoint utility uses a Berkeley DB environment (as  described
59       for  the  -h  option,  the environment variable DB_HOME, or because the
60       utility was run in a directory containing a Berkeley  DB  environment).
61       In order to avoid environment corruption when using a Berkeley DB envi‐
62       ronment, db_checkpoint should always be given the chance to detach from
63       the environment and exit gracefully.  To cause db_checkpoint to release
64       all environment resources and exit cleanly, send it an interrupt signal
65       (SIGINT).
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67       The  db_checkpoint  utility  does not attempt to create the Berkeley DB
68       shared memory regions if they do not already  exist.   The  application
69       that creates the region should be started first, and once the region is
70       created, the db_checkpoint utility should be started.
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72       The DB_ENV->txn_checkpoint method is the underlying method used by  the
73       db_checkpoint utility. See the db_checkpoint utility source code for an
74       example of using  DB_ENV->txn_checkpoint  in  a  IEEE/ANSI  Std  1003.1
75       (POSIX) environment.
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EXIT STATUS

78       The  db_checkpoint  utility  exits  0  on  success,  and >0 if an error
79       occurs.
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ENVIRONMENT

82       DB_HOME
83              If the -h option is not specified and the  environment  variable
84              DB_HOME  is set, it is used as the path of the database home, as
85              described in DB_ENV->open.
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SEE ALSO

88       db_archive(1)  db_deadlock(1)  db_dump(1)  db_hotbackup(1)  db_log_ver‐
89       ify(1)    db_load(1)   db_printlog(1)   db_recover(1)   db_replicate(1)
90       db_stat(1) db_tuner(1) db_upgrade(1) db_verify(1)
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94BerkeleyDB 5.3.21              06 December 2016               DB_CHECKPOINT(1)