Spot Instance limits
There is a limit on the number of running and requested Spot Instances per AWS account per Region. Spot Instance limits are managed in terms of the number of virtual central processing units (vCPUs) that your running Spot Instances are either using or will use pending the fulfillment of open Spot Instance requests. If you terminate your Spot Instances but do not cancel the Spot Instance requests, the requests count against your Spot Instance vCPU limit until Amazon EC2 detects the Spot Instance terminations and closes the requests.
There are six Spot Instance limits:
-
All Standard (A, C, D, H, I, M, R, T, Z) Spot Instance Requests
-
All F Spot Instance Requests
-
All G Spot Instance Requests
-
All Inf Spot Instance Requests
-
All P Spot Instance Requests
-
All X Spot Instance Requests
Each limit specifies the vCPU limit for one or more instance families. For
information about the different instance families, generations, and sizes, see
Amazon EC2 Instance
Types
With vCPU limits, you can use your limit in terms of the number of vCPUs that are
required
to launch any combination of instance types that meet your changing application
needs. For example, say your All Standard Spot Instance Requests limit is 256
vCPUs, you
could request 32 m5.2xlarge Spot Instances (32 x 8 vCPUs) or 16
c5.4xlarge Spot Instances (16 x 16 vCPUs), or a combination of any Standard
Spot Instance types and sizes that total 256
vCPUs.
Monitor Spot Instance limits and usage
You can view and manage your Spot Instance limits using the following:
-
The Limits page
in the Amazon EC2 console -
The Amazon EC2 Services quotas page
in the Service Quotas console -
The get-service-quota AWS CLI
For more information, see Amazon EC2 service quotas in the Amazon EC2 User Guide for Linux Instances and Viewing service quotas in the Service Quotas User Guide.
With Amazon CloudWatch metrics integration, you can monitor EC2 usage against limits. You can also configure alarms to warn about approaching limits. For more information, see Service Quotas and Amazon CloudWatch alarms in the Service Quotas User Guide.
Request a Spot Instance limit increase
Even though Amazon EC2 automatically increases your Spot Instance limits based on
your usage, you can
request a limit increase if necessary. For example, if you intend to launch more
Spot Instances than your current limit allows, you can request a limit increase.
You can also
request a limit increase if you submit a Spot Instance request and you receive
the error
Max spot instance count exceeded.
To request a Spot Instance limit increase
-
Open the Create case, Service limit increase form in the Support Center console at https://console.aws.amazon.com/support/home#/case/create
. -
For Limit type, choose EC2 Spot Instances.
-
For Region, select the required Region.
-
For Primary instance type, select the Spot Instance limit for which you want to request a limit increase.
-
For New limit value, enter the total number of vCPUs that you want to run concurrently. To determine the total number of vCPUs that you need, see Amazon EC2 Instance Types
to find the number of vCPUs of each instance type. -
(Conditional) You must create a separate limit request for each Spot Instance limit. To request an increase for another Spot Instance limit, choose Add another request and repeat steps 4 and 5 in this procedure.
-
For Use case description, enter your use case, and then choose Submit.
For more information about viewing limits and requesting a limit increase, see Amazon EC2 service quotas.
