Root Cause
A recent change in the core application led to a query that negatively affected the database's performance. This issue was noticed when users experienced slow loading times.
Resolution
During the incident, a spike was observed in the monitoring system, but the issue resolved itself without any direct intervention. Later, the engineering teams discovered that the problem began after a specific change was applied, and they implemented a fix to address it.
Action Plan
To prevent similar issues in the future, we will improve a telemetry system for this type of application scenario and review the latency in the monitoring system.