Ensure 'log_planner_stats' database flag for Cloud SQL PostgreSQL instance is set to 'off'

The 'log_planner_stats' flag enables a crude profiling method for logging PostgreSQL planner performance statistics which even though can be useful for troubleshooting, it may increase the amount of logs significantly and have performance overhead.

Risk Level: Low
Cloud Entity: GCP CloudSql
CloudGuard Rule ID: D9.GCP.LOG.09
Covered by Spectral: Yes
Category: Database

GSL LOGIC

CloudSql where databaseVersion like 'POSTGRES%' should have settings.databaseFlags contain [ name like 'log_planner_stats' and value like 'off' ]

REMEDIATION

From Portal

  1. Go to https://console.cloud.google.com/sql/instances and navigate to the instance where the flag needs to be set
  2. Click Edit Configurations
  3. Under flags section, choose add flag, look for log_planner_stats and choose value - off.
  4. Save and review your changes

From TF
Set the flag 'log_planner_stats' to 'off':

resource 'google_sql_database_instance' 'default' {
	...
	settings {
		database_flags {
			name  = 'log_planner_stats'
			value = 'off'
		}
	}
}

From Command Line

  1. First retrieve all existing flags values:
gcloud sql instances describe INSTANCE_NAME
  1. Add all existing flags and their value to the patch request - otherwise they will get set to their default value.
gcloud sql instances patch INSTANCE_NAME --database-flags (ExistingFlag1=Value1,ExistingFlag2=Value2,...),log_planner_stats=off

References

  1. https://cloud.google.com/sql/docs/postgres/flags
  2. https://www.postgresql.org/docs/9.6/runtime-config-statistics.html#RUNTIME-CONFIG-STATISTICS-MONITOR
  3. https://www.postgresql.org/docs/9.5/planner-optimizer.html

GCP CloudSql

Cloud SQL is a fully managed database service that makes it easy to set up, maintain, manage, and administer your relational PostgreSQL, MySQL, and SQL Server databases in the cloud.

Compliance Frameworks

  • CloudGuard GCP All Rules Ruleset
  • GCP CIS Foundations v. 1.2.0
  • GCP CloudGuard Best Practices
  • GCP MITRE ATT&CK Framework v12.1
  • GCP NIST 800-53 Rev 5