Providers define how uptime is calculated. AWS Supply Chain measures availability in 5-minute intervals, deeming an instance “Unavailable” if all connection requests fail during that interval. The Monthly Uptime Percentage is calculated by subtracting from 100% the percentage of 5-minute intervals in which the service was unavailable .
Code42 uses a simpler formula: total minutes of Availability divided by total minutes in the month, less scheduled maintenance, multiplied by 100 .
Calculating the Credit
If the provider falls short of the commitment, the customer receives a credit—typically a percentage of the monthly fee for the affected service.
AWS Supply Chain Credit Table :
| Monthly Uptime Percentage | Service Credit Percentage |
|---|---|
| Less than 99.9% but ≥ 99.0% | 10% |
| Less than 99.0% but ≥ 95.0% | 25% |
| Less than 95.0% | 100% |
AWS Deadline Cloud Credit Table :
| Monthly Uptime Percentage | Service Credit Percentage |
|---|---|
| Less than 99.95% but ≥ 99.0% | 10% |
| Less than 99.0% but ≥ 95.0% | 25% |
| Less than 95.0% | 100% |
| Monthly Uptime Percentage | Service Credit Percentage |
|---|---|
| 99.0% to 99.9% | 5% |
| Less than 99.0% | 10% |
| Monthly Uptime Percentage | Service Credit Percentage |
|---|---|
| Less than 99.9% but ≥ 99.0% | 10% |
| Less than 99.0% but ≥ 95.0% | 25% |
| Less than 95.0% | 50% |