aria_chk - Aria table-maintenance utility
Describe, check and repair of Aria tables. Used without options all tables on
the command will be checked for errors
- -#, --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
- 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 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
- -V, --version
- Print version and exit.
- -w, --wait
- Wait if table is locked.
- -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
- -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
- -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
- -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
- -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.
- 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.
- -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
- 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.
For more information, please refer to the MariaDB Knowledge Base, available
online at https://mariadb.com/kb/