Error
Error Code:
3627
MySQL Error 3627: Histogram Statistics Failure
Description
This error indicates that MySQL was unable to generate histogram statistics for a specified column in a table. Histograms are crucial for the query optimizer to make efficient execution plans, especially for columns with skewed data distribution. This failure can lead to suboptimal query performance and affect query execution plans.
Error Message
Unable to build histogram statistics for column '%s' in table '%s'.'%s'
Known Causes
4 known causesInsufficient User Permissions
The database user attempting to generate statistics lacks the necessary privileges (e.g., SELECT) on the table or its columns required to read data for histogram creation.
Table or Index Corruption
Underlying corruption in the target table data or one of its associated indexes can prevent MySQL from successfully scanning the data needed to build the histogram.
Server Resource Constraints
Lack of available memory or temporary disk space on the MySQL server can hinder the resource-intensive process of building histograms, especially for large datasets.
Internal MySQL Issue
An unexpected internal error or a specific bug within the MySQL server version might interfere with the histogram generation process under certain conditions.
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