What caused the sudden spike in error rates for MURAL's real-time collaboration feature last week?

Introduction

The sudden spike in error rates for MURAL's real-time collaboration feature last week is a critical issue that demands immediate attention. As we dive into this analysis, we'll systematically identify potential causes, validate our hypotheses, and develop a comprehensive plan to address the root cause while considering both short-term fixes and long-term implications.

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 collaboration feature in the past week?

Why it matters: Recent changes often correlate with sudden performance issues. Expected answer: Yes, there was a minor update to improve latency. Impact on approach: If confirmed, we'd focus on the recent changes and their potential side effects.

• Considering user segmentation, I'm curious about the error distribution. Are we seeing this spike across all user segments or is it concentrated in specific groups?

Why it matters: Helps narrow down potential causes and affected areas. Expected answer: The spike is more pronounced among enterprise users. Impact on approach: We'd investigate enterprise-specific features or infrastructure.

• Given the nature of real-time collaboration, I'm wondering about any changes in usage patterns. Have we seen any unusual spikes in concurrent users or data volume recently?

Why it matters: Unusual load could strain the system and cause errors. Expected answer: There's been a 20% increase in concurrent users over the past month. Impact on approach: We'd focus on scalability and performance under increased load.

• Thinking about external factors, I'm curious if there have been any changes in our infrastructure or third-party services. Have we switched or updated any critical dependencies recently?

Why it matters: External dependencies can significantly impact our service reliability. Expected answer: We migrated to a new CDN provider two weeks ago. Impact on approach: We'd investigate the CDN migration and its potential effects on our collaboration feature.