NAME

       aria_chk - Aria table-maintenance utility

SYNOPSIS

       aria_chk [OPTIONS] tables[.MAI]

DESCRIPTION

       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

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

       --logdir=path
              Path for log files

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

       --require-control-file
              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 silent.

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

       -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.

       --warning-for-wrong-transaction-id

              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
              Correct checksum information for table.

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

       -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.

       --max-record-length=#
              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 file.

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

       --character-sets-dir=...
              Directory where character sets are.

       --set-collation=name
              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'.

       --stats_method=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
              "nulls_ignored".

       -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 applications.

       -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.

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

   Variables
       --page_buffer_size=#
              Size of page buffer. Used by --safe-repair

       --read_buffer_size=#
              Read buffer size for sequential reads during scanning

       --sort_buffer_size=#
              Size of sort buffer. Used by --recover

       --sort_key_blocks=#
              Internal buffer for sorting keys; Don't touch.

       --write_buffer_size=#
              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-defaults
              Print the program argument list and exit.

       --no-defaults
              Don't read default options from any option file.

       --defaults-file=#
              Only read default options from the given file #.

       --defaults-extra-file=#
              Read this file after the global files are read.

SEE ALSO

       myisamchk(1)

       For  more  information,  please  refer  to the MariaDB Knowledge Base, available online at
       https://mariadb.com/kb/