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  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

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

       -e|--extend-check
              Check  the  table  VERY  thoroughly.   One need use this only in
              extreme cases as isamchk should normally find  all  errors  even
              without this switch

       -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 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 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 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!)

       -u|--unpack
              Unpack file 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 and exit.

       -w|--wait
              Wait if 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), 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    4.1.10a    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 4.1                      19 December 2000                     isamchk(1)