MYISAMLOG(1)                 MySQL Database System                MYISAMLOG(1)

       myisamlog - display MyISAM log file contents

       myisamlog [options] [log_file [tbl_name] ...]

       myisamlog processes the contents of a MyISAM log file. To create such a
       file, start the server with a --log-isam=log_file option.

       Invoke myisamlog like this:

           myisamlog [options] [file_name [tbl_name] ...]

       The default operation is update (-u). If a recovery is done (-r), all
       writes and possibly updates and deletes are done and errors are only
       counted. The default log file name is myisam.log if no log_file
       argument is given. If tables are named on the command line, only those
       tables are updated.

       myisamlog supports the following options:

       o   -?, -I

           Display a help message and exit.

       o   -c N

           Execute only N commands.

       o   -f N

           Specify the maximum number of open files.

       o   -F filepath/

           Specify the file path with a trailing slash.

       o   -i

           Display extra information before exiting.

       o   -o offset

           Specify the starting offset.

       o   -p N

           Remove N components from path.

       o   -r

           Perform a recovery operation.

       o   -R record_pos_file record_pos

           Specify record position file and record position.

       o   -u

           Perform an update operation.

       o   -v

           Verbose mode. Print more output about what the program does. This
           option can be given multiple times to produce more and more output.

       o   -w write_file

           Specify the write file.

       o   -V

           Display version information.

       Copyright (C) 1997, 2022, Oracle and/or its affiliates.

       This documentation is free software; you can redistribute it and/or
       modify it only under the terms of the GNU General Public License as
       published by the Free Software Foundation; version 2 of the License.

       This documentation is distributed in the hope that it will be useful,
       but WITHOUT ANY WARRANTY; without even the implied warranty of
       General Public License for more details.

       You should have received a copy of the GNU General Public License along
       with the program; if not, write to the Free Software Foundation, Inc.,
       51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see

       For more information, please refer to the MySQL Reference Manual, which
       may already be installed locally and which is also available online at

       Oracle Corporation (

MySQL 5.7                         06/07/2022                      MYISAMLOG(1)
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