Error
Error Code:
1151
MariaDB Error 1151: Too many delayed threads
Description
This error indicates that the MariaDB server has reached its configured limit for the number of concurrent `INSERT DELAYED` threads. It prevents new `INSERT DELAYED` statements from being processed until existing delayed threads complete or the limit is increased.
Error Message
Too many delayed threads in use
Known Causes
3 known causesConfigured Thread Limit Reached
The server's `max_delayed_threads` system variable is set too low for the current workload, causing the server to reject new delayed inserts.
Excessive INSERT DELAYED Statements
A high volume of `INSERT DELAYED` queries from applications is overwhelming the server's capacity to manage these operations concurrently.
Stalled Delayed Insert Operations
Existing `INSERT DELAYED` threads are taking too long to complete, possibly due to slow disk I/O, locks, or inefficient query execution, leading to a backlog.
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