Memory alert - DBCS

Hi Team,

We recieved alert today:

High Memory usage - please check PROD DB
State FIRING
Type OK_TO_FIRING
Severity CRITICAL
Notification type Grouped messages across metric streams
Alarm Summary Memory Utilization - PROD
Body High Memory usage
Time 2026-10-28T11:33:00Z
Query MemoryUtilization[15m]{resourceId = "ocid1.dbsystem********33qvoieubiixa"}.mean() > 80
Number of metrics breaching threshold 1

We have collected information and uploaded here. Immediately the alert was back to normal.

Can you please guide us what caused the alert.

Thanks,

SGU