Ensure High-Risk Parameters Cannot Be Arbitrarily Modified via `SET GLOBAL`

How it is checked

Audit method: Manual review

This recommendation cannot be checked automatically. A scan lists it with these instructions when you pass --include-manual.

Run SELECT User, Host FROM mysql.user WHERE Super_priv = 'Y' AND User NOT LIKE 'tdsqlsys%'; and check SYSTEM_VARIABLES_ADMIN grants (SELECT * FROM mysql.global_grants WHERE PRIV = 'SYSTEM_VARIABLES_ADMIN'). Only TDSQL system accounts may hold them; with audit logging enabled, review the audit trail for unexpected SET GLOBAL statements.

How it is fixed

Fix method: Guidance or infrastructure patch

1. Allow only TDSQL system accounts (tdsqlsys_*) to hold the SUPER privilege. 2. Have business accounts modify parameters uniformly through the OSS management interface. 3. Enable audit logging of SET GLOBAL operations.