View instance metrics
The Monitoring tab on a scaling group's details page shows real-time resource utilization for the Elastic Compute Service (ECS) instances in the group, including CPU, memory, disk, and network metrics. Use this view to assess whether your scaling policies are responding correctly to resource changes.
Prerequisites
Before you begin, ensure that you have:
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Monitoring enabled for the scaling group
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An ECS-type scaling group (this topic covers ECS instance metrics only)
Available metrics
The following metrics are available. Each metric chart appears only after you create an event-triggered task for that metric — if a chart shows no data, no event-triggered task has been created for it yet.
| Category | Metrics |
|---|---|
| CPU, memory, and load metrics | CPU Utilization (%), Memory Usage (%), Loads |
| System Disk Metrics | System Disk Read/Write BPS (byte/s), System Disk IOPS (count/s) |
| Network metrics | Public Bandwidth (bit/s), Internal Bandwidth (bit/s) |
| QPS metric | (ALB) QPS per Backend Server |
For details about each metric and its thresholds, see Event-triggered tasks of the system monitoring type. The metrics displayed in the Auto Scaling console take precedence.
View metrics
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Log on to the Auto Scaling console.
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In the left-side navigation pane, click Scaling Groups.
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In the top navigation bar, select the region where Auto Scaling is activated.
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Go to the details page of the target scaling group using either of the following methods:
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Click the ID of the scaling group in the Scaling Group Name/ID column.
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Click Details in the Actions column.
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Click the Monitoring tab.
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Review the metric charts for the ECS instances in the scaling group.
The following figure shows the CPU, Memory, and Load Metrics category as an example.
Work with metric charts
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Show or hide a dimension: Click Average or Maximum in the upper part of a chart to toggle the corresponding data series.
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Zoom in: Click
to enlarge a chart. In the enlarged view, drag to select a time range and inspect data for that period. -
No data in a chart: No event-triggered task has been created for that metric. Follow the on-screen prompt to create one. For instructions, see Manage event-triggered tasks.
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Which chart appears: The chart is determined by the Monitoring Metrics you set when creating the event-triggered task. For example, setting Monitoring Metrics to System Disk Read (Byte/s) or System Disk Write (Byte/s) makes the System Disk Read/Write BPS (byte/s) chart appear in the System Disk Metrics section.