PCA Observability Concepts Practice Question
You are seeing 'Too many active series' in your Prometheus logs. Which action should be your first priority to address this?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Analyze the number of active series per label name.
Identifying which labels are causing the high cardinality is the standard first step to prevent OOM (Out Of Memory) crashes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Switch to a different monitoring tool.
Why it's wrong here
Not an appropriate immediate action.
- ✗
Disable all alerting rules.
Why it's wrong here
This does not solve the memory/storage issue.
- ✓
Analyze the number of active series per label name.
Why this is correct
This helps isolate the source of high cardinality.
- ✗
Increase Prometheus memory limits.
Why it's wrong here
This is a temporary fix, not a solution to cardinality.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official CNCF / Linux Foundation exam blueprint
This PCA practice question is part of Courseiva's free CNCF / Linux Foundation certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCA exam.