Error
Error Code:
4082
MySQL Error 4082: Connection Memory Limit Exceeded
Description
This error indicates that a single client connection to the MySQL server has consumed more memory than permitted by the configured `connection_memory_limit` server variable. When this threshold is breached, the server forcibly closes the connection to prevent resource exhaustion, leading to an immediate connection termination.
Error Message
Connection closed. Connection memory limit %llu bytes exceeded. Consumed %llu bytes.
Known Causes
3 known causesExcessive Query Memory Usage
A single SQL query, such as one involving large sorts, complex joins, extensive temporary table use, or a very large result set, consumes memory beyond the allowed limit for that connection.
Inefficient Application Design
The application code might be requesting vast amounts of data without proper pagination, holding open large result sets, or performing operations that cumulatively exhaust the connection's allocated memory.
Low Server Connection Memory Limit
The `connection_memory_limit` server variable is set too low for the typical workload or specific complex operations, causing legitimate connections to hit the ceiling prematurely.
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