Monitor Load Balancer Capacity Unit reservation for your Application Load Balancer - Elastic Load Balancing
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Monitor Load Balancer Capacity Unit reservation for your Application Load Balancer

Reservation status

The following are the possible status values for an LCU reservation:

  • pending ‐ Indicates the reservation it is in the process of provisioning.

  • provisioned ‐ Indicates the reserved capacity is ready and available to use.

  • failed ‐ Indicates the request cannot be completed at the time.

  • rebalancing ‐ Indicates an availability zone has been added or removed and the load balancer is rebalancing capacity.

LCU utilization

The ReservedLCUs metric is reported on a per-minute basis. Capacity is reserved on an hourly basis. For example, if you have a LCU reservation of 6,000, the one-hour total for ReservedLCUs is 6,000, and the one-minute total is 100. To determine your reserved LCU utilization, refer to the PeakLCUs metric. You can set CloudWatch alarms to compare the per-minute Sum of PeakLCUs against your reserved capacity value, or the per-hour Sum of ReservedLCUs, to determine whether you have reserved enough capacity to meet your needs.

Console
To view the status of an LCU reservation

  1. Open the Amazon EC2 console at https://console.amazonaws.cn/ec2/.

  2. On the navigation pane, choose Load Balancers.

  3. Select the load balancer name.

  4. On the Capacity tab, you can view the Reservation Status and Reserved LCU value.

Amazon CLI
To monitor the status of an LCU reservation

Use the describe-capacity-reservation command.

aws elbv2 describe-capacity-reservation \
    --load-balancer-arn load-balancer-arn