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## • --help 

Display a help message and exit. 

## • --basedir= dir_name 

The path to the MySQL installation directory. 

## • --core-file-size= size 

The size of the core file that mysqld  should be able to create. The option value is passed to ulimit - c . 

## • --datadir= dir_name 

The path to the data directory. 

## • --defaults-extra-file= file_name 

## Note 

The innodb_buffer_pool_in_core_file  variable can be used to reduce the size of core files on operating systems that support it. For more information, see Section 15.8.3.7, “Excluding Buffer Pool Pages from Core Files” . 

Read this option file in addition to the usual option files. If the file does not exist or is otherwise inaccessible, the server exits with an error. If file_name  is not an absolute path name, it is interpreted relative to the current directory. This must be the first option on the command line if it is used. 

For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling” . 

## • --defaults-file= file_name 

Use only the given option file. If the file does not exist or is otherwise inaccessible, the server exits with an error. If file_name  is not an absolute path name, it is interpreted relative to the current directory. This must be the first option on the command line if it is used. 

For additional information about this and other option-file options, see Section 4.2.2.3, “Command-Line Options that Affect Option-File Handling” . 

## • --ledir= dir_name 

If mysqld_safe  cannot find the server, use this option to indicate the path name to the directory where the server is located. 

This option is accepted only on the command line, not in option files. On platforms that use systemd, the value can be specified in the value of MYSQLD_OPTS . See Section 2.5.9, “Managing MySQL Server with systemd” . 

## • --log-error= file_name 

