Scoring Rules

This section describes inspection scoring rules.

Points are deducted based on scoring rules. You can view scores on the console. For details, see Inspection Score.

Scoring Rules

**Table 1** Scoring rules of RDS for MySQL instances
Score Deduction Item	Description	Sub-item	Condition	Score Calculation Rule
Memory usage	Average memory usage per day	Major event	Memory > 90%	min[3 + (Memory - 0.9) × 50, 10]
Memory usage	Average memory usage per day	Warning	80% ≤ Memory ≤ 90%	1 + (Memory usage – 0.8) × 20
CPU usage	Average CPU usage per day NOTE: Multi-core CPUs need to be converted to single-core CPUs for calculation.	Major event	CPU usage ≥ 80%	min[3 + (CPU usage - 0.8) × 30, 10]
CPU usage		Warning	70% ≤ CPU usage ≤ 80%	1 + (CPU usage - 0.7) × 20
Space usage	(Average used space/Total space) x 100%	Major event	Space usage > 90%	min[3 + (Space usage - 0.9) × 40, 10]
Space usage	(Average used space/Total space) x 100%	Warning	70% ≤ Space usage ≤ 90%	1 + (Space usage - 0.7) × 20
Connection usage	Average connections per day/Maximum of connections allowed in a day	Major event	Connection usage > 80%	3
Connection usage		Warning	70% ≤ Connection rate ≤ 80%	1
IOPS usage	(Average IOPS per day/Maximum of IOPS allowed) x 100%	Major event	IOPS usage > 90%	5
IOPS usage	(Average IOPS per day/Maximum of IOPS allowed) x 100%	Warning	70% < IOPS usage < 90%	3
Active sessions	Active sessions generated in a day	Major event	Active sessions > min(4 × CPU cores + 8, 96)	9
Active sessions	Active sessions generated in a day	Warning	Active sessions > min(2 × CPU cores + 8, 64)	3
Slow SQL statements	Slow SQL statements executed per day	Major event	slowSqlCount>=500	18+(slowSqlCount-10)/30
		Warning	100 ≤ Slow SQL statements < 500	4 + (Slow SQL statements - 100)/30
		Optimization	0 < Slow SQL statements < 100	1 + (Slow SQL statements - 10)/30