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How long are 1 minute data points maintained for viewing in Amazon CloudWatch?
15 days
One minute data points are available for 15 days. Five minute data points are available for 63 days. One hour data points are available for 455 days (15 months).
What is the minimum duration of a CloudWatch alarm?
When setting an alarm on a basic monitoring metric, select a period of at least 300 seconds (5 minutes). Detailed monitoring for Amazon EC2 provides metrics for your instances with a resolution of 1 minute.
What should we do to have CloudWatch metrics for EC2 at a 1 minute rate?
CloudWatch metrics for EC2 status checks at one minute frequency are free to all EC2 customers and are automatically enabled on all EC2 instances. To view these metrics, select a running instance in the EC2 console and click on the “Monitoring” tab or view them in Amazon CloudWatch.
How long logs are stored in CloudWatch?
You can store your log data in CloudWatch Logs for as long as you want. By default, CloudWatch Logs will store your log data indefinitely. You can change the retention for each Log Group at any time.
What is period in CloudWatch alarm?
Period is the length of time to evaluate the metric or expression to create each individual data point for an alarm. It is expressed in seconds. If you choose one minute as the period, the alarm evaluates the metric once per minute.
How do I know if CloudWatch is enabled?
Using AWS Console 04 Select the EC2 instance that you want to examine. 05 Select the Description tab from the dashboard bottom panel. 06 Verify the Monitoring attribute value to determine the level of CloudWatch monitoring enabled for the instance.
Do CloudWatch logs expire?
Log retention – By default, logs are kept indefinitely and never expire. You can adjust the retention policy for each log group, keeping the indefinite retention, or choosing a retention period between 10 years and one day. Archive log data – You can use CloudWatch Logs to store your log data in highly durable storage.
How long are data points available on Amazon CloudWatch?
Data points with a period of less than 60 seconds are available for 3 hours. These data points are high-resolution custom metrics. Data points with a period of 60 seconds (1 minute) are available for 15 days Data points with a period of 300 seconds (5 minute) are available for 63 days
What is the evaluation period in Amazon CloudWatch?
Period is the length of time to evaluate the metric or expression to create each individual data point for an alarm. It is expressed in seconds. If you choose one minute as the period, there is one data point every minute. Evaluation Period is the number of the most recent periods, or data points, to evaluate when determining alarm state.
What does insufficient data mean on Amazon CloudWatch?
INSUFFICIENT_DATA – The alarm has just started, the metric is not available, or not enough data is available for the metric to determine the alarm state. When you create an alarm, you specify three settings to enable CloudWatch to evaluate when to change the alarm state:
How are data points aggregated in CloudWatch?
CloudWatch metrics are aggregated by pod, service, and namespace using their name. Increasing the count of running instances will not impact the count of CloudWatch metrics generated. All CloudWatch metrics are prorated on an hourly basis. This example assumes that data points are reported for the entire month.