What caused the sudden spike in latency for Motive Technologies's Driver App during the last 48 hours?

Introduction

The sudden spike in latency for Motive Technologies's Driver App over the last 48 hours is a critical issue that demands immediate attention. As we analyze this product problem, we'll follow a systematic framework to identify, validate, and address the root cause while considering both immediate and long-term implications.

Our approach will involve a thorough examination of the issue, generation of data-driven hypotheses, and development of a comprehensive solution strategy. We'll begin by clarifying the context, then rule out external factors before diving deep into the product's user journey, metric breakdown, and potential internal causes.

Step 1

Clarifying Questions (3 minutes)

• Looking at the timing, I'm thinking this could be related to a recent deployment. Has there been any significant update or change to the Driver App in the past week?

Why it matters: Recent changes often correlate with performance issues. Expected answer: Yes, there was a minor update three days ago. Impact on approach: If confirmed, we'd prioritize investigating that update.

• Considering the nature of the app, I'm wondering about usage patterns. Has there been any unusual spike in user activity or new user onboarding recently?

Why it matters: Unexpected load can strain systems and cause latency. Expected answer: No significant changes in user activity. Impact on approach: If true, we'd focus more on internal systems rather than user behavior.

• Given the specificity of "48 hours," I'm curious about our monitoring systems. Are we confident in the accuracy of our latency measurements and that the definition hasn't changed?

Why it matters: Ensures we're solving a real problem, not a measurement issue. Expected answer: Yes, monitoring systems are reliable and unchanged. Impact on approach: If confirmed, we proceed with confidence in our data.

• Thinking about the app's architecture, I'm wondering about dependencies. Have there been any changes or issues with third-party services or APIs that the Driver App relies on?

Why it matters: External dependencies can significantly impact app performance. Expected answer: No known issues with third-party services. Impact on approach: If true, we'd focus more on our internal systems and code.