How Can I Log Grails SQL Statements for Performance Monitoring?

Grails SQL Statement Logging

Grails provides a convenient way to log SQL statements to a console or file for performance analysis purposes. Here's how you can configure SQL logging in Grails:

Problem:

How can I log all SQL queries executed by Grails to monitor performance?

Solution:

Within your DataSource.groovy file, add the following property:

datasource {
    ...
    logSql = true
}

Explanation:

Setting logSql to true will enable SQL logging. By default, Grails will log SQL statements to the console. To log them to a file, you can use the logSqlQueriesToFile property in your DataSource.groovy file:

datasource {
    ...
    logSql = true
    logSqlQueriesToFile = true
}

This will create a log file named sqldebug.log in your project's logs directory. The log file will contain all SQL statements executed by Grails, along with their execution times.

Note that the logSql property can also be set to a verbosity level, with the following options:

• false: No SQL logging
• true: Log all SQL statements
• 'statement': Log only SQL statements
• 'metadata': Log only query metadata (e.g., parameters, bindings)

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