ARIA_CHK(1)                     User Commands                    ARIA_CHK(1)

NAME         top

       aria_chk - Aria table-maintenance utility

SYNOPSIS         top

       aria_chk [OPTIONS] tables[.MAI]

DESCRIPTION         top

       Describe, check and repair of Aria tables.  Used without options all
       tables on the command will be checked for errors

   Global options
       -#, --debug=...
              Output debug log. Often this is 'd:t:o,filename'.

       -H, --HELP
              Print all argument options sorted alphabetically.

       -?, --help
              Print all options by groups

              Path for control file (and logs if --logdir not used)

              Path for log files

              Don't open the control file. Only use this if you are sure the
              tables are not in use by another program!

              Abort if we can't find/read the maria_log_control file

       -s, --silent
              Only print errors.  One can use two -s to make maria_chk very

       -t, --tmpdir=path
              Path for temporary files. Multiple paths can be specified,
              separated by colon (:), they will be used in a round-robin

       -v, --verbose
              Print more information. This can be used with --description
              and --check. Use many -v for more verbosity.

       -V, --version
              Print version and exit.

       -w, --wait
              Wait if table is locked.

   Check options (check is the default action for aria_chk)
       -c, --check
              Check table for errors.

       -e, --extend-check
              Check the table VERY throughly.  Only use this in extreme
              cases as aria_chk should normally be able to find out if the
              table is ok even without this switch.

       -F, --fast
              Check only tables that haven't been closed properly.

       -C, --check-only-changed
              Check only tables that have changed since last check.

       -f, --force
              Restart with '-r' if there are any errors in the table.
              States will be updated as with '--update-state'.

       -i, --information
              Print statistics information about table that is checked.

       -m, --medium-check
              Faster than extend-check, but only finds 99.99% of all errors.
              Should be good enough for most cases.

       -T, --read-only
              Don't mark table as checked.

       -U, --update-state
              Mark tables as crashed if any errors were found and clean if
              check didn't find any errors but table was marked as 'not
              clean' before. This allows one to get rid of warnings like
              'table not properly closed'. If table was updated, update also
              the timestamp for when the check was made. This option is on
              by default!  Use --skip-update-state to disable.


              Give a warning if we find a transaction id in the table that
              is bigger than what exists in the control file. Use --skip-...
              to disable warning

   Recover (repair)/ options (When using '--recover' or '--safe-recover')
       -B, --backup
              Make a backup of the .MAD file as 'filename-time.BAK'.

              Correct checksum information for table.

       -D, --data-file-length=#
              Max length of data file (when recreating data file when it's

       -e, --extend-check
              Try to recover every possible row from the data file Normally
              this will also find a lot of garbage rows; Don't use this
              option if you are not totally desperate.

       -f, --force
              Overwrite old temporary files.

       -k, --keys-used=#
              Tell Aria to update only some specific keys. # is a bit mask
              of which keys to use. This can be used to get faster inserts.

              Skip rows bigger than this if aria_chk can't allocate memory
              to hold it.

       -r, --recover
              Can fix almost anything except unique keys that aren't unique.

       -n, --sort-recover
              Forces recovering with sorting even if the temporary file
              would be very big.

       -p, --parallel-recover
              Uses the same technique as '-r' and '-n', but creates all the
              keys in parallel, in different threads.

       -o, --safe-recover
              Uses old recovery method; Slower than '-r' but can handle a
              couple of cases where '-r' reports that it can't fix the data

              Log repair command to transaction log. This is needed if one
              wants to use the aria_read_log to repeat the repair

              Directory where character sets are.

              Change the collation used by the index.

       -q, --quick
              Faster repair by not modifying the data file.  One can give a
              second '-q' to force aria_chk to modify the original datafile
              in case of duplicate keys.  NOTE: Tables where the data file
              is currupted can't be fixed with this option.

       -u, --unpack
              Unpack file packed with ariapack.

   Other actions
       -a, --analyze
              Analyze distribution of keys. Will make some joins in MariaDB
              faster.  You can check the calculated distribution by using
              '--description --verbose table_name'.

              Specifies how index statistics collection code should treat
              NULLs. Possible values of name are "nulls_unequal" (default
              for 4.1/5.0), "nulls_equal" (emulate 4.0), and

       -d, --description
              Prints some information about table.

       -A, --set-auto-increment[=value]
              Force auto_increment to start at this or higher value If no
              value is given, then sets the next auto_increment value to the
              highest used value for the auto key + 1.

       -S, --sort-index
              Sort index blocks.  This speeds up 'read-next' in

       -R, --sort-records=#
              Sort records according to an index.  This makes your data much
              more localized and may speed up things (It may be VERY slow to
              do a sort the first time!).

       -b,  --block-search=#
              Find a record, a block at given offset belongs to.

       -z,  --zerofill
              Fill empty space in data and index files with zeroes.  This
              makes the data file movable between different servers.

              Like --zerofill but does not zero out LSN of data/index pages.

              Size of page buffer. Used by --safe-repair

              Read buffer size for sequential reads during scanning

              Size of sort buffer. Used by --recover

              Internal buffer for sorting keys; Don't touch.

              Write buffer size for sequential writes during repair

       Default options are read from the following files in the given order:
       /etc/my.cnf /etc/mysql/my.cnf ~/.my.cnf

       The following groups are read: aria_chk

       The following options may be given as the first argument:

              Print the program argument list and exit.

              Don't read default options from any option file.

              Only read default options from the given file #.

              Read this file after the global files are read.

SEE ALSO         top


       For more information, please refer to the MariaDB Knowledge Base,
       available online at

COLOPHON         top

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aria_chk Ver 1.2                  May 2014                       ARIA_CHK(1)