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MySQL 5.7 Reference Manual  /  ...  /  Preventing the Use of Optimizer Trace

8.15.14 Preventing the Use of Optimizer Trace

If, for some reason, you wish to prevent users from seeing traces of their queries, start the server with the options shown here: 

--maximum-optimizer-trace-max-mem-size=0 --optimizer-trace-max-mem-size=0

This sets the maximum size to 0 and prevents users from changing this limit, thus truncating all traces to 0 bytes.


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Related Documentation
MySQL 5.7 Release Notes
Download this Manual
PDF (US Ltr) - 35.1Mb
PDF (A4) - 35.2Mb
Man Pages (TGZ) - 255.8Kb
Man Pages (Zip) - 360.8Kb
Info (Gzip) - 3.4Mb
Info (Zip) - 3.4Mb
Excerpts from this Manual
MySQL Backup and Recovery
MySQL Globalization
MySQL Information Schema
MySQL Installation Guide
MySQL and Linux/Unix
MySQL and macOS
MySQL Partitioning
MySQL Performance Schema
MySQL Replication
Using the MySQL Yum Repository
MySQL Restrictions and Limitations
Security in MySQL
MySQL and Solaris
Building MySQL from Source
Starting and Stopping MySQL
MySQL Tutorial
MySQL and Windows
MySQL NDB Cluster 7.5