What factors are contributing to the increased latency in Auth0's Rules execution times observed in the last 48 hours?

Introduction

Auth0's Rules execution times have experienced increased latency over the past 48 hours, potentially impacting user authentication flows and overall system performance. To address this critical issue, I'll employ a systematic approach to identify, validate, and resolve the root cause while considering both immediate and long-term implications for our authentication service.

Step 1

Clarifying Questions (3 minutes)

• I'm noticing the timeframe is quite specific. Has there been any recent deployment or configuration change in the last 72 hours?

Why it matters: Recent changes often correlate with performance issues. Expected answer: Yes, a minor update was pushed 3 days ago. Impact on approach: If confirmed, I'd prioritize investigating that change.

• Are we seeing this latency increase across all customers or is it isolated to specific segments?

Why it matters: Helps determine if it's a global issue or limited to certain use cases. Expected answer: It's affecting about 60% of our enterprise customers. Impact on approach: I'd focus on commonalities among affected customers.

• Has there been any significant increase in traffic or usage patterns in the last week?

Why it matters: Sudden spikes can strain system resources and cause latency. Expected answer: Traffic has been relatively stable. Impact on approach: If true, I'd shift focus from scaling issues to internal factors.

• Are we observing any correlated increases in error rates or timeouts?

Why it matters: Helps identify if it's a performance degradation or system failure. Expected answer: Error rates have remained stable, but timeouts have increased. Impact on approach: I'd investigate bottlenecks in the Rules execution pipeline.

• Have we received any customer complaints or support tickets related to this issue?

Why it matters: Validates the real-world impact and urgency of the problem. Expected answer: Several high-priority tickets from enterprise customers. Impact on approach: I'd prioritize quick wins to alleviate customer pain points.