Some SQL Monitor alerts are categorized as performance-related alerts. This categorization is useful when you are trying to suppress alerts through alert suppression windows.

Here is a list of all the performance alerts in SQL Monitor:

Host machine alerts

• Physical memory
• Processor under-utilization
• Processor utilization

SQL Server alerts

• Blocking process
• Custom metric collection error
• Database unavailable
• Deadlock
• Deadlock (extended event)
• Job duration unusual
• Long-running query

Availability group alerts

• Availability group – query slowdown
• Availability group – replication falling behind