You need to define SLOs for a high-traffic web application. Customers are currently happy with the application performance and availability. Based on current measurement, the 90th percentile of…

The correct answer is B. 90th percentile - 160 ms. Chosen option accurately reflects the current performance metrics without increasing expectations beyond what has been measured. Setting the SLOs at the current 90th and 95th percentile latencies ensures that you maintain customer satisfaction and trust, as they are accustomed…

Submitted by katya_ua· Apr 18, 2026Applying site reliability engineering principles to a service

Question

You need to define SLOs for a high-traffic web application. Customers are currently happy with the application performance and availability. Based on current measurement, the 90th percentile of latency is 160 ms and the 95th percentile of latency is 300 ms over a 28-day window. What latency SLO should you publish?

Options

A90th percentile - 150 ms
B90th percentile - 160 ms
C90th percentile - 190 ms
D90th percentile - 300 ms

How the community answered

(60 responses)

A
3% (2)
B
85% (51)
C
8% (5)
D
3% (2)

Explanation

Chosen option accurately reflects the current performance metrics without increasing expectations beyond what has been measured. Setting the SLOs at the current 90th and 95th percentile latencies ensures that you maintain customer satisfaction and trust, as they are accustomed to this level of performance. Lowering the SLOs might be too aggressive, and raising them would risk setting unachievable goals, potentially leading to customer dissatisfaction if performance drops.

Topics

#SLO#SRE principles#Latency#Percentiles

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