1ARIA_CHK(1) User Commands ARIA_CHK(1)
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6 aria_chk - Aria table-maintenance utility
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9 aria_chk [OPTIONS] tables[.MAI]
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12 Describe, check and repair of Aria tables. Used without options all
13 tables on the command will be checked for errors
14 Global options
16 -#, --debug=...
17 Output debug log. Often this is 'd:t:o,filename'.
18 -H, --HELP
20 Print all argument options sorted alphabetically.
21 -?, --help
23 Print all options by groups
24 --datadir=path
26 Path for control file (and logs if --logdir not used)
27 --logdir=path
29 Path for log files
30 --ignore-control-file
32 Don't open the control file. Only use this if you are sure the
33 tables are not in use by another program!
34 --require-control-file
36 Abort if we can't find/read the maria_log_control file
37 -s, --silent
39 Only print errors. One can use two -s to make maria_chk very
40 silent.
41 -t, --tmpdir=path
43 Path for temporary files. Multiple paths can be specified, sepa‐
44 rated by colon (:), they will be used in a round-robin fashion.
45 -v, --verbose
47 Print more information. This can be used with --description and
48 --check. Use many -v for more verbosity.
49 -V, --version
51 Print version and exit.
52 -w, --wait
54 Wait if table is locked.
55 Check options (check is the default action for aria_chk)
57 -c, --check
58 Check table for errors.
59 -e, --extend-check
61 Check the table VERY thoroughly. Only use this in extreme cases
62 as aria_chk should normally be able to find out if the table is
63 ok even without this switch.
64 -F, --fast
66 Check only tables that haven't been closed properly.
67 -C, --check-only-changed
69 Check only tables that have changed since last check.
70 -f, --force
72 Restart with '-r' if there are any errors in the table. States
73 will be updated as with '--update-state'.
74 -i, --information
76 Print statistics information about table that is checked.
77 -m, --medium-check
79 Faster than extend-check, but only finds 99.99% of all errors.
80 Should be good enough for most cases.
81 -T, --read-only
83 Don't mark table as checked.
84 -U, --update-state
86 Mark tables as crashed if any errors were found and clean if
87 check didn't find any errors but table was marked as 'not clean'
88 before. This allows one to get rid of warnings like 'table not
89 properly closed'. If table was updated, update also the time‐
90 stamp for when the check was made. This option is on by default!
91 Use --skip-update-state to disable.
92 --warning-for-wrong-transaction-id
94 Give a warning if we find a transaction id in the table that is
96 bigger than what exists in the control file. Use --skip-... to
97 disable warning
98 Recover (repair)/ options (When using '--recover' or '--safe-recover')
100 -B, --backup
101 Make a backup of the .MAD file as 'filename-time.BAK'.
102 --correct-checksum
104 Correct checksum information for table.
105 -D, --data-file-length=#
107 Max length of data file (when recreating data file when it's
108 full).
109 -e, --extend-check
111 Try to recover every possible row from the data file Normally
112 this will also find a lot of garbage rows; Don't use this option
113 if you are not totally desperate.
114 -f, --force
116 Overwrite old temporary files.
117 -k, --keys-used=#
119 Tell Aria to update only some specific keys. # is a bit mask of
120 which keys to use. This can be used to get faster inserts.
121 --max-record-length=#
123 Skip rows bigger than this if aria_chk can't allocate memory to
124 hold it.
125 -r, --recover
127 Can fix almost anything except unique keys that aren't unique.
128 -n, --sort-recover
130 Forces recovering with sorting even if the temporary file would
131 be very big.
132 -p, --parallel-recover
134 Uses the same technique as '-r' and '-n', but creates all the
135 keys in parallel, in different threads.
136 -o, --safe-recover
138 Uses old recovery method; Slower than '-r' but can handle a cou‐
139 ple of cases where '-r' reports that it can't fix the data file.
140 --transaction-log
142 Log repair command to transaction log. This is needed if one
143 wants to use the aria_read_log to repeat the repair
144 --character-sets-dir=...
146 Directory where character sets are.
147 --set-collation=name
149 Change the collation used by the index.
150 -q, --quick
152 Faster repair by not modifying the data file. One can give a
153 second '-q' to force aria_chk to modify the original datafile in
154 case of duplicate keys. NOTE: Tables where the data file is
155 currupted can't be fixed with this option.
156 -u, --unpack
158 Unpack file packed with ariapack.
159 Other actions
161 -a, --analyze
162 Analyze distribution of keys. Will make some joins in MariaDB
163 faster. You can check the calculated distribution by using
164 '--description --verbose table_name'.
165 --stats_method=name
167 Specifies how index statistics collection code should treat
168 NULLs. Possible values of name are "nulls_unequal" (default for
169 4.1/5.0), "nulls_equal" (emulate 4.0), and "nulls_ignored".
170 -d, --description
172 Prints some information about table.
173 -A, --set-auto-increment[=value]
175 Force auto_increment to start at this or higher value If no
176 value is given, then sets the next auto_increment value to the
177 highest used value for the auto key + 1.
178 -S, --sort-index
180 Sort index blocks. This speeds up 'read-next' in applications.
181 -R, --sort-records=#
183 Sort records according to an index. This makes your data much
184 more localized and may speed up things (It may be VERY slow to
185 do a sort the first time!).
186 -b, --block-search=#
188 Find a record, a block at given offset belongs to.
189 -z, --zerofill
191 Fill empty space in data and index files with zeroes. This
192 makes the data file movable between different servers.
193 --zerofill-keep-lsn
195 Like --zerofill but does not zero out LSN of data/index pages.
196 Variables
198 --page_buffer_size=#
199 Size of page buffer. Used by --safe-repair
200 --read_buffer_size=#
202 Read buffer size for sequential reads during scanning
203 --sort_buffer_size=#
205 Size of sort buffer. Used by --recover
206 --sort_key_blocks=#
208 Internal buffer for sorting keys; Don't touch.
209 --write_buffer_size=#
211 Write buffer size for sequential writes during repair
212 Default options are read from the following files in the given order:
214 /etc/my.cnf /etc/mysql/my.cnf ~/.my.cnf
215 The following groups are read: aria_chk
217 The following options may be given as the first argument:
219 --print-defaults
221 Print the program argument list and exit.
222 --no-defaults
224 Don't read default options from any option file.
225 --defaults-file=#
227 Only read default options from the given file #.
228 --defaults-extra-file=#
230 Read this file after the global files are read.
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233 myisamchk(1)
234 For more information, please refer to the MariaDB Knowledge Base,
236 available online at https://mariadb.com/kb/
237aria_chk Ver 1.2 May 2014 ARIA_CHK(1)