The server rejects a startup or SET command because a numeric option received a non-decimal or out-of-range value.
MySQL Error 84 EE_INVALID_DECIMAL_VALUE_FOR_OPTION appears when the server or client passes a non-decimal or out-of-range number to an option such as --connect_timeout. Validate the value with a pure decimal string or adjust the range, then restart the statement or server.
Invalid decimal value for option '%s'. EE_INVALID_DECIMAL_VALUE_FOR_OPTION was added in 8.0.13.
Error 84 "EE_INVALID_DECIMAL_VALUE_FOR_OPTION" means MySQL received an option value that is expected to be a decimal, but the supplied string cannot be parsed as a valid base-10 integer within the acceptable range.
The error is raised at server startup, during client connection, or when executing a dynamic SET command.
It was introduced in MySQL 8.0.13 and classed as a global configuration error.
MySQL throws error 84 when a numeric option such as max_connections, connect_timeout, or innodb_log_files_in_group receives a value containing non-digit characters, leading zeros with 0x, or scientific notation.
The error also occurs if the value is numeric but exceeds the upper or lower boundary defined in the codebase for that variable.
Confirm the failing option name in the error text, locate it in my.cnf or the SET statement, and replace the value with a pure decimal string like 30 or 1024.
Restart the mysqld service or re-run the SET command.
Use SHOW VARIABLES LIKE 'option_name'; to verify the change succeeded.
Startup failure: If mysqld will not start, comment out the suspect option, start the server, then edit my.cnf with the corrected decimal value.
Session SET failure: When SET GLOBAL max_connections='2k'; fails, run SET GLOBAL max_connections=2048; instead.
Validate configuration files through mysqld --validate-config before restarting production servers.
This command reports invalid option values without applying them.
Use automation tools or the Galaxy SQL editor to lint and version my.cnf snippets. Peer review catches typos like 5m or 0x20 in numeric variables.
Error 85 EE_INVALID_INTEGER_VALUE_FOR_OPTION arises for integer-only options; the resolution process is identical.
Error ER_WRONG_VALUE_FOR_VAR indicates an invalid runtime value when SETting dynamic system variables. Correct the value or range.
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No. MySQL expects pure decimal strings. Use full numbers like 1048576.
Error code 84 exists earlier, but the specific message EE_INVALID_DECIMAL_VALUE_FOR_OPTION was introduced in 8.0.13.
Check the MySQL error log. The message prints the offending option name in single quotes.
Galaxy's SQL editor stores and versions configuration snippets, letting teams peer-review numeric parameters before deployment.
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