Confusing alarms when launching AWS CF template

[paolodamico]

Recently I launched a CF template to set up the infrastructure for a customer. Just after the resources were deployed, I received a few alarms in the SNS topic. The alarms were cleared pretty soon, presumably just due to a transition state on the launch of the resources. While this is not critical, as the alarms were cleared soon, it's not a great experience that the first emails you get after the deployment are error notices.

Alarms triggered:

• Posthog-ElastiCacheMemoryFullAlarm. Threshold Crossed: 1 datapoint [4.65436672E8] was less than the threshold (6.4E8). Redis memory over the last 10 minutes is too low, your instance might not be ingesting events
• Posthog-RDSDiskFullAlarm. Threshold Crossed: 1 datapoint [1.015771136E10] was not less than the threshold (1.0E9)