Overallmysqlstmterrno

Overallmysqlstmterrno is a status variable in MySQL that provides a cumulative count of errors encountered during statement execution. It is part of the `performance_schema.global_status` table, which offers a wide range of server status information. This variable tracks errors that occur when MySQL attempts to execute an SQL statement.

The value of Overallmysqlstmterrno increments each time an error condition is detected during statement processing. This can encompass a variety of issues, such as syntax errors, permission denied errors, data type mismatches, or constraint violations. By monitoring this variable, administrators can gain insights into the frequency of statement execution problems within their MySQL server.

A consistently increasing value for Overallmysqlstmterrno may indicate underlying issues with the queries being run, the database schema, or user privileges. Analyzing the specific errors that contribute to this count, often in conjunction with other error logging mechanisms, is crucial for effective troubleshooting and performance tuning. It is a useful metric for identifying potential areas of instability or inefficiency in database operations.