17. 価格
• 100万カスタムイベントあたり$1.00
***** Each 64KB of payload (rounded up) is billed as one custom event. For
example, a single custom event with a 256KB payload will be billed as four
custom events. A single custom event with a 65KB payload will be billed as two
custom events.
https://aws.amazon.com/cloudwatch/pricing/?nc1=h_ls