PCDE Practice Question: Manage a solution that can span multiple database technologies
A DevOps engineer needs to monitor Cloud SQL for MySQL replication lag on a read replica to ensure data freshness. Which Cloud Monitoring metric should they create an alert on?
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
✓
cloudsql.googleapis.com/database/replication/lag
The metric 'replication_lag' in Cloud SQL measures the seconds behind the primary. Cloud SQL for MySQL uses 'seconds_behind_master' internally, but the exposed metric is 'replication_lag'.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
cloudsql.googleapis.com/database/replication/lag
Why this is correct
Correct. The metric for replication lag in Cloud SQL is 'replication_lag'.
- ✗
cloudsql.googleapis.com/database/replica/state
Why it's wrong here
This metric shows the replica state (e.g., running/stopped), not lag.
- ✗
cloudsql.googleapis.com/database/postgresql/replication/lag
Why it's wrong here
This metric is for PostgreSQL, not MySQL.
- ✗
cloudsql.googleapis.com/database/mysql/replication/seconds_behind_master
Why it's wrong here
This is not the correct metric name; the metric is 'replication_lag'.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCDE practice question is part of Courseiva's free Google Cloud 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 PCDE exam.