Scoring Rules

This section describes scoring rules of the inspection scoring function.

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	Average memory usage per day	Major event	Memory > 90%	min[3 + (Memory - 0.9) × 50, 10]
Memory	Average memory usage per day	Warning	80% ≤ Memory ≤ 90%	1 + (Memory - 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 usage ≤ 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	0 < Slow SQL statements < 100	1 + (Slow SQL statements - 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