What Are Restrictions on Using AS?

Only applications that are stateless and horizontally scalable can run on ECS instances in an AS group. ECS instances in an AS group can be released automatically by AS, so the ECS instances cannot be used to save application status information (such as session statuses) or related data (such as database data and logs).

If the application status or related data must be saved, you can store the information on separate servers.

Table 1 lists the AS quotas.

**Table 1** Quotas
Item	Description	Default
AS group	Maximum number of AS groups per region per account	10
AS configuration	Maximum number of AS configurations per region per account	100
AS policy	Maximum number of AS policies per AS group	10
Instance	Maximum number of instances per AS group	300
Bandwidth scaling policy	Maximum number of bandwidth scaling policies per region per account	10
Lifecycle hook	Maximum number of lifecycle hooks per AS group	5
Notification	Maximum number of notifications per AS group	5
Tag	Maximum number of tags per AS group	10

Parent topic: General

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