attainmentGoal
The threshold that determines if the goal is being met.
If this is a period-based SLO, the attainment goal is the percentage of good periods that meet the threshold requirements to the total periods within the interval. For example, an attainment goal of 99.9% means that within your interval, you are targeting 99.9% of the periods to be in healthy state.
If this is a request-based SLO, the attainment goal is the percentage of requests that must be successful to meet the attainment goal.
If you omit this parameter, 99 is used to represent 99% as the attainment goal.