How Can I Efficiently Retrieve Past MySQL Queries Across All Servers?

Get Insights into Past MySQL Queries

Maintaining visibility over database operations is crucial for debugging and performance analysis. This article explores a method to retrieve the last queries executed across all MySQL servers in an efficient manner.

All Servers, One Query

For MySQL versions 5.1.12 and above, the database provides a comprehensive solution to display executed queries on all servers:

Step 1: Enable Query Logging Globally

• Execute SET GLOBAL log_output = 'TABLE';
• Execute SET GLOBAL general_log = 'ON';

Step 2: Access the Log Table
Navigate to mysql.general_log table in the MySQL database to view the recorded query history.

Alternatively, Log to File

If table logging is not preferred, you can opt to output to a file:

Step 1: Set File Logging

• SET GLOBAL log_output = 'FILE';
• SET GLOBAL general_log_file = '/path/to/your/logfile.log';

Step 2: Enable File Logging

• SET GLOBAL general_log = 'ON';

Why Choose Runtime Control?

This approach offers several advantages over editing configuration files:

• Avoids permanent logging by controlling it in real-time.
• Eliminates file path conflicts by specifying a destination at runtime.
• Bypass server restart, preserving connections and settings.

For more detailed information, refer to MySQL 5.1 Reference Manual: https://dev.mysql.com/doc/refman/5.1/en/server-system-variables.html#sysvar_general_log

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