Observability
Logs, metrics, alarms.
My default
One tool in this layer.
Good features. Keep it for the logs you watch live and alarm on; send the chatty bulk through Firehose to S3.
Pricing: Sydney: Lambda logs $0.67/GB ingested (the first discount starts at 10 TB a month); Infrequent Access class $0.335/GB; storage $0.033/GB-month. Lambda's built-in delivery to S3 also costs $0.335/GB. Free tier: 5 GB a month.
Where they're used
The jobs that pick or avoid a tool from this layer.
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