Error
Error Code:
3549
MySQL Error 3549: Persistent Variable Failure
Description
This error indicates that MySQL was unable to persist a system variable change, typically when using `SET PERSIST` or similar commands. It means the server could not write the variable's state to disk for future restarts, often due to permission issues or configuration limitations.
Error Message
Variables cannot be persisted. Please retry.
Known Causes
4 known causesInsufficient Privileges
The user attempting to persist the variable lacks the necessary `SYSTEM_VARIABLES_ADMIN` or `SUPER` privileges to modify and persist global system variables.
Configuration File Write Issues
MySQL cannot write to its auto-configuration file (`mysqld-auto.cnf`), potentially due to incorrect file permissions, the file system being read-only, or insufficient disk space.
Invalid Variable Value or Syntax
The value provided for the variable is invalid, or the `SET PERSIST` statement itself contains a syntax error, preventing successful persistence.
Server Running in Read-Only Mode
The MySQL server instance might be running in a restricted or read-only mode, which explicitly prevents any persistent changes to system variables.
Solutions
Coming SoonDetailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:
General Troubleshooting Tips
- Check the error message carefully for specific details
- Review recent changes that might have caused the error
- Search for the exact error code in the official documentation
- Check log files for additional context
- Try restarting the application or service