MYISAMLOG(1)

NAME
myisamlog - display MyISAM log file contents

SYNOPSIS

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

DESCRIPTION

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:

    • -?, -I

    Display a help message and exit.

    • -c N

    Execute only N commands.

    • -f N

    Specify the maximum number of open files.

    • -F filepath/

    Specify the file path with a trailing slash.

    • -i

    Display extra information before exiting.

    • -o offset

    Specify the starting offset.

    • -p N

    Remove N components from path.

    • -r

    Perform a recovery operation.

    • -R record_pos_file record_pos

    Specify record position file and record position.

    • -u

    Perform an update operation.

    • -v

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

    • -w write_file

    Specify the write file.

    • -V

    Display version information.

COPYRIGHT

Copyright © 1997, 2025, 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 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 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 http://www.gnu.org/licenses/.

SEE ALSO
For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online at http://dev.mysql.com/doc/.

AUTHOR
Oracle Corporation (http://dev.mysql.com/).