isamchk(1) MySQL database isamchk(1) NAME isamchk - Description, check and repair of ISAM tables. Used without options all tables on the command will be checked for errors USAGE isamchk [OPTIONS] tables[.ISM] SYNOPSIS isamchk [-a|--analyze] [-#|--debug=...] [--character-sets-dir=...] [-C|--default-character-set=...] [-d|--description] [-e|--extend-check] [-f|--force] [-?|--help] [-i|--information] [-k|--keys-used=#] [-l|--no-symlinks] [-q|--quick] [-r|--recover] [-o|--safe-recover] [-O|--set-variable var=option] [-s|--silent] [-S|--sort-index] [-R|--sort-records=#] [-u|--unpack] [-v|--verbose] [-V|--version] [-w|--wait] DESCRIPTION -a|--analyze Analyze distribution of keys. Will make some joins in(1,8) MySQL faster. -#|--debug=... Output debug log. Often this is 'd:t:o ,filename` --character-sets-dir=... Directory where character sets are -C|--default-character-set=... Set the default character set(7,n,1 builtins) -d|--description Prints some information about table. -e|--extend-check Check the table VERY thoroughly. One need use this only in(1,8) extreme cases as isamchk should normally find all errors even without this switch(1,n) -f|--force Overwrite old temporary files. If one uses -f when checking tables (running isamchk without -r), isamchk will automatically restart with -r on any wrong table. -?|--help Display help and exit. -i|--information Print statistics information about the table -k|--keys-used=# Used with '-r'. Tell ISAM to update(7,n) only the first # keys. This can be used to get faster inserts! -l|--no-symlinks Do not follow symbolic links when repairing. Normally isamchk repairs the table a symlink points at. -q|--quick Used with -r to get a faster repair. (The data file(1,n) isn't touched.) One can give a second '-q' to force isamchk to modify the original datafile. -r|--recover Can fix almost anything except unique keys that aren't unique. -o|--safe-recover Uses old recovery method; slower than '-r' but can handle a cou- ple of cases that '-r' cannot handle. -O| --set-variable var=option Change the value of a variable. -s|--silent Only print errors. One can use two -s to make isamchk very silent -S|--sort-index Sort index blocks. This speeds up 'read-next' in(1,8) 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(1,3) the first time(1,2,n)!) -u|--unpack Unpack file(1,n) packed with pack_isam. -v|--verbose Print more information. This can be used with -d and -e. Use many -v for more verbosity! -V|--version Print version(1,3,5) and exit. -w|--wait Wait if(3,n) table is locked. SEE ALSO isamlog(1), mysql(1), mysqlaccess(1), mysqladmin(1), mysqld(1), mysqld_multi(1), mysqld_safe(1), mysqldump(1), mysql_fix_privi- lege_tables(1), mysqlshow(1), mysql_zap(1), perror(1,3)(1), replace(1) For more information please refer to the MySQL reference manual, which may already be installed locally and which is also available online at http://www.mysql.com/doc/en/ BUGS Please refer to http://bugs.mysql.com/ to report bugs. AUTHOR Ver 1.0, distribution 4.0.21 Michael (Monty) Widenius (monty@mysql.com), MySQL AB (http://www.mysql.com/). This software comes with no warranty. Manual page by L. (Kill-9) Pedersen (kill-9@kill-9.dk), Mercurmedia Data Model Architect / system developer (http://www.mercurmedia.com) MySQL 4.0 19 December 2000 isamchk(1)