Stream Doctor

Ming

Liu

Saiguang Che

Weijia

Today’s Pulse Diagnostics

Stream Doctor

What is on Pulse?

What is the real world?

Intelligent

diagnostics

Too much

information

Top 3 groups with negative impacts

Top 3 groups with positive impacts

Area of circle indicates the significance of impact

A True Story

Top 3 groups with negative impacts

Top 3 groups with positive impacts

Customer can easily use Stream Doctor to find the root cause of any KPI change
- Performance downgrade
- Performance improvement
Cause analysis covers all group-bys
Can be run within any given time range

Sort all groups by ZScore

Higher ZScore >> Higher Severity

\frac{Metric_{g}-Metric_{ng}}{\sqrt{Metric_{all}*(1-Metric_{all})*(\frac{1}{NumAttemps_{g}}+\frac{1}{NumAttemps_{ng}})}}

\frac{​ M e t r i c ​ g ​ ​ - M e t r i c ​ n g ​ ​ ​ ​}{​ \sqrt ​ M e t r i c ​ a l l ​ ​ * ( 1 - M e t r i c ​ a l l ​ ​ ) * ( \frac{​ 1 ​ ​}{​ N u m A t t e m p s ​ g ​ ​ ​} + \frac{​ 1 ​ ​}{​ N u m A t t e m p s ​ n g ​ ​ ​} ) ​ ​ ​ ​}

By Weijia Li