Manage a solution that can span multiple database technologies →mediumMultiple ChoiceObjective-mapped
PCDE Practice Question: Manage a solution that can span multiple database technologies
A company uses Cloud SQL for PostgreSQL. They need to monitor the replication lag on a read replica. Which metric should they use in Cloud Monitoring?
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/postgresql/replication/replica_lag
For PostgreSQL replicas in Cloud SQL, the metric 'cloudsql.googleapis.com/database/postgresql/replication/replica_lag' measures lag in bytes (seconds can be derived). The metric 'replication_lag' is available for MySQL. For PostgreSQL, the specific metric is 'replica_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/replica_lag
Why it's wrong here
This metric is for MySQL.
- ✓
cloudsql.googleapis.com/database/postgresql/replication/replica_lag
Why this is correct
Correct. This is the specific metric for PostgreSQL replicas.
- ✗
cloudsql.googleapis.com/database/replication/lag_seconds
Why it's wrong here
Not a real metric.
- ✗
cloudsql.googleapis.com/database/postgresql/replication/lag
Why it's wrong here
The correct metric name is 'replica_lag'.
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