You have an Azure subscription named Sub1 that contains an Azure Log Analytics workspace named LAW1.
You have 100 on-premises servers that run Windows Server 2012 R2 and Windows Server 2016. The servers connect to LAW1. LAW1 is configured to collect security-related performance counters from the connected servers.
You need to configure alerts based on the data collected by LAW1. The solution must meet the following requirements:
* Alert rules must support dimensions.
* The time it takes to generate an alert must be minimized.
* Alert notifications must be generated only once when the alert is generated and once when the alert is
* resolved.
Which signal type should you use when you create the alert rules?