Amazon Elastic Compute Cloud
User Guide for Linux (API Version 2014-10-01)
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Spot Instance Limits

Spot Instance requests are subject to several limits:

  • An overall request limit per region

  • Specific instance type limits per region

  • A bid price limit

The overall limit varies by region and account (new accounts might have a lower limit). If you submit a Spot Instance request and you receive the error Max spot instance count exceeded, your account is either at its overall limit for the region, or at the limit for the specific instance type for the region. To submit a limit increase request, go to AWS Support Center and complete the request form. In the Use Case Description field, indicate that you are requesting an increase to the request limit for Spot Instances. For more information, see General Limits and Instance Type Limits.

Note

The overall limit applies to active or open Spot Instance requests. If you terminate your Spot Instance and do not cancel the request, your overall limit may still include the request until the Spot service detects the termination and closes your request.

The bid price limit is designed to protect you from incurring unexpected charges. To increase your bid price limit, send a request to spot-limit-increase@amazon.com. Include your AWS account number, the bid price limit you need, the instance type, the region, the product platform, how you manage Spot interruptions, and why you need this increase.

General Limits

The following table lists the general limits related to Spot Instances.

ResourceLimit

Number of overall Spot Instance requests

20 per region

Bid price

Four times the On-Demand price

Instance Type Limits

The following table lists the default special limits for specific instance types. For instance types not listed here, your overall Spot Instance request limit applies. If you request a maximum bid limit increase for a specific instance type, the new limit is applied to all instance types, and overrides the default limits listed in this table. The sum of all active or open Spot Instance requests in a region can't exceed the overall Spot Instance request limit per region (see General Limits).

Number of Spot Instance requests per typeLimit per region

cg1.4xlarge

10

g2.2xlarge

10

c3.4xlarge and c3.8xlarge

20

c4.large, c4.xlarge, c4.2xlarge, c4.4xlarge, and c4.8xlarge

5

cc1.4xlarge

20

cc2.8xlarge

20

m2.2xlarge and m2.4xlarge

20

hi1.4xlarge

10

r3.large, r3.xlarge, and r3.2xlarge

10

r3.4xlarge and r3.8xlarge

5

Unsupported Instance Types

The following instance types are not supported for Spot:

  • T2

  • I2

  • HS1

Some Spot Instance types aren't available in every region. To view the supported instance types for a region, go to Spot Instance Pricing and select the region from the Region list.