High Resolution CloudWatch Metrics

Posted on August 2nd 2017

CloudWatch is used in most production setups in AWS and metrics have always been stored at five minute intervals with the ability to add "detailed monitoring" for one minute intervals on your most critical pieces of infrastructure.

Now you have the ability to send metrics at a one second high resolution! This will give you the ability to detect more transient conditions that would typically be hard to catch with infrequent samples.

CloudWatch metrics are rolled up over time; resolution effectively decreases as the metrics age. Here’s the schedule:

- 1 second metrics are available for 3 hours.
- 60 second metrics are available for 15 days.
- 5 minute metrics are available for 63 days.
- 1 hour metrics are available for 455 days (15 months).


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