description Amazon CloudWatch Overview
CloudWatch is the centralized observability suite for monitoring AWS resources and applications. It collects metrics (CPU utilization, request counts) and logs from virtually every AWS service. Its ability to set up sophisticated alarms and dashboards means teams can proactively detect performance degradation or security anomalies before they impact users, making it crucial for operational stability.
help Amazon CloudWatch FAQ
What does Amazon CloudWatch monitor?
CloudWatch collects metrics, logs, traces, and events from AWS resources and applications. Common examples include EC2 CPU utilization, Lambda invocations, API Gateway requests, and log messages from CloudWatch Logs.
Can CloudWatch send an alert when an AWS metric crosses a limit?
Yes, CloudWatch alarms can watch a metric such as EC2 CPU usage and trigger an action when it stays above or below a defined threshold. Notifications are commonly sent through Amazon SNS, which can then deliver email, SMS, or integrations.
Is CloudWatch the same as AWS CloudTrail?
No. CloudWatch focuses on operational monitoring, metrics, logs, and alarms, while CloudTrail records API activity for auditing and governance. Many AWS teams use both because they answer different questions about system health and account actions.
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