Server System Variables value, but do not produce immediate validation termination or an exit code of 1. For more information, see Section 5.1.3, “Server Configuration Validation” . If this option is enabled (the default), the server checks each user account and produces a warning if conditions are found that would make the account unusable: Enabling  --validate-user-plugins  slows down server initialization and  FLUSH PRIVILEGES . If you do not require the additional checking, you can disable this option at startup to avoid the performance decrement. Use this option with the  --help  option for detailed help. Display version information and exit. The MySQL server maintains many system variables that configure its operation. Each system variable has a default value. System variables can be set at server startup using options on the command line or in an option file. Most of them can be changed dynamically at runtime using the  SET  statement, which enables you to modify operation of the server without having to stop and restart it. You can also use system variable values in expressions. Setting a global system variable runtime value normally requires the  SYSTEM_VARIABLES_ADMIN privilege (or the deprecated  SUPER  privilege). Setting a session system runtime variable value normally requires no special privileges and can be done by any user, although there are exceptions. For more information, see Section 5.1.9.1, “System Variable Privileges” There are several ways to see the names and values of system variables: •To see the current values used by a running server, use the  SHOW VARIABLES  statement or the Performance Schema system variable tables. See Section 27.12.14, “Performance Schema System Variable Tables” . •To see the values that a server uses based only on its compiled-in defaults, ignoring the settings in any option files, use this command: •To see the values that a server uses based on its compiled-in defaults and any option files that it reads, use this command: 761 mysqld --no-defaults --verbose --help mysqld --verbose --help 5.1.8 Server System Variables • --version ,  -V • --verbose ,  -v •The account requires an authentication plugin that is not loaded. •The account requires the  sha256_password  or  caching_sha2_password  authentication plugin but the server was started with neither SSL nor RSA enabled as required by the plugin. • --validate-user-plugins[={OFF|ON}] Command-Line Format --validate-user-plugins[={OFF|ON}] Type Boolean Default Value ON