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Server Load Balancer:Limits

Last Updated:Feb 02, 2024

Application Load Balancer (ALB) is available in the following editions: Basic, Standard, and WAF-enabled. This topic describes the quotas on basic, standard, and WAF-enabled ALB instances, and how to request a quota increase.

Note
  • In the following table, a hyphen (-) indicates that the item is irrelevant to the instance.

  • If the same resource is associated with more than one object, the resource consumes the quota on each of the objects. For example, a backend server is associated with two listeners and two forwarding rules of the same ALB instance. In this case, the system determines that the remaining quota on backend servers of the ALB instance is reduced by four.

Resource quotas per ALB instance

Item

Edition

Default quota

Maximum quota

Quota increase method

Maximum number of additional certificates that can be added to an ALB instance, excluding default certificates

Basic

10

150

You can request a quota increase by using one of the following methods:

  • Go to the SLB Management page, click the ALB tab, and then increase the quota alb_quota_loadbalancer_certificates_num_basic_edition.

  • Log on to the Quota Center console and request a quota increase.

Standard

25

300

You can request a quota increase by using one of the following methods:

  • Go to the SLB Management page, click the ALB tab, and then increase the quota alb_quota_loadbalancer_certificates_num_standard_edition.

  • Log on to the Quota Center console and request a quota increase.

WAF-enabled

25

300

You can request a quota increase by using one of the following methods:

  • Go to the SLB Management page, click the ALB tab, and then increase the quota alb_quota_loadbalancer_certificates_num_standardwithwaf_edition.

  • Log on to the Quota Center console and request a quota increase.

Maximum number of forwarding rules that can be configured for an ALB instance, excluding default forwarding rules

Basic

40

100

You can request a quota increase by using one of the following methods:

  • Go to the SLB Management page, click the ALB tab, and then increase the quota alb_quota_loadbalancer_rules_num_basic_edition.

  • Log on to the Quota Center console and request a quota increase.

Standard

100

200

You can request a quota increase by using one of the following methods:

  • Go to the SLB Management page, click the ALB tab, and then increase the quota alb_quota_loadbalancer_rules_num_standard_edition.

  • Log on to the Quota Center console and request a quota increase.

WAF-enabled

100

200

You can request a quota increase by using one of the following methods:

  • Go to the SLB Management page, click the ALB tab, and then increase the quota alb_quota_loadbalancer_rules_num_standardwithwaf_edition.

  • Log on to the Quota Center console and request a quota increase.

Maximum number of listeners that can be added to an ALB instance

Basic

50

80

You can request a quota increase by using one of the following methods:

  • Go to the SLB Management page, click the ALB tab, and then increase the quota alb_quota_loadbalancer_listeners_num_basic_edition.

  • Log on to the Quota Center console and request a quota increase.

Standard

50

100

You can request a quota increase by using one of the following methods:

  • Go to the SLB Management page, click the ALB tab, and then increase the quota alb_quota_loadbalancer_listeners_num_standard_edition.

  • Log on to the Quota Center console and request a quota increase.

WAF-enabled

50

100

You can request a quota increase by using one of the following methods:

  • Go to the SLB Management page, click the ALB tab, and then increase the quota alb_quota_loadbalancer_listeners_num_standardwithwaf_edition.

  • Log on to the Quota Center console and request a quota increase.

Maximum number of backend servers that can be added to an ALB instance

Basic

200

400

You can request a quota increase by using one of the following methods:

  • Go to the SLB Management page, click the ALB tab, and then increase the quota alb_quota_loadbalancer_servers_num_basic_edition.

  • Log on to the Quota Center console and request a quota increase.

Standard

1,000

1,500

You can request a quota increase by using one of the following methods:

  • Go to the SLB Management page, click the ALB tab, and then increase the quota alb_quota_loadbalancer_servers_num_standard_edition.

  • Log on to the Quota Center console and request a quota increase.

WAF-enabled

1,000

1,500

You can request a quota increase by using one of the following methods:

  • Go to the SLB Management page, click the ALB tab, and then increase the quota alb_quota_loadbalancer_servers_num_standardwithwaf_edition.

  • Log on to the Quota Center console and request a quota increase.

Resource quotas per listener

Item

Edition

Default quota

Maximum quota

Quota increase method

Maximum number of network access control lists (ACLs) that can be associated with each listener

Basic/standard/WAF-enabled

3

-

N/A

Maximum number of network ACL entries that can be associated with each listener

Basic

300

-

N/A

Standard

500

-

N/A

WAF-enabled

500

-

N/A

Maximum timeout period for a connection request when a listener is created

Basic/standard/WAF-enabled

180 seconds

600 seconds

You can request a quota increase by using one of the following methods:

  • Go to the SLB Management page, click the ALB tab, and then increase the quota alb_quota_max_request_timeout.

  • Log on to the Quota Center console and request a quota increase.

Maximum timeout period for an idle connection when a listener is created

Basic/standard/WAF-enabled

60 seconds

600 seconds

You can request a quota increase by using one of the following methods:

  • Go to the SLB Management page, click the ALB tab, and then increase the quota alb_quota_max_idle_timeout.

  • Log on to the Quota Center console and request a quota increase.

Resource quotas per forwarding rule

Item

Edition

Default quota

Maximum quota

Quota increase method

Maximum number of actions that can be specified in a forwarding rule

Basic

3

-

N/A

Standard

5

-

N/A

WAF-enabled

5

-

N/A

Maximum number of match conditions that can be specified in a forwarding rule

Basic

5

-

N/A

Standard

10

-

N/A

WAF-enabled

10

-

N/A

Maximum number of wildcard character matching rules that can be specified in a forwarding rule

Basic

5

-

N/A

Standard

10

-

N/A

WAF-enabled

10

-

N/A

Resource quotas per server group

Item

Edition

Default quota

Maximum quota

Quota increase method

Maximum number of listeners or forwarding rules that can be associated with each server group

Basic/standard/WAF-enabled

50

100

You can request a quota increase by using one of the following methods:

  • Go to the SLB Management page, click the ALB tab, and then increase the quota alb_quota_servergroup_attached_num.

  • Log on to the Quota Center console and request a quota increase.

Maximum number of ALB server groups in which a backend server (IP address) can be specified

Basic/standard/WAF-enabled

200

300

You can request a quota increase by using one of the following methods:

  • Go to the SLB Management page, click the ALB tab, and then increase the quota alb_quota_server_added_num.

  • Log on to the Quota Center console and request a quota increase.

Maximum number of backend servers (IP addresses and ports) that can be added to each server group

Basic/standard/WAF-enabled

1,000

-

N/A

Resource quotas per network ACL and security policy

Item

Edition

Default quota

Maximum quota

Quota increase method

Maximum number of listeners that can be associated with each network ACL

Basic/standard/WAF-enabled

50

-

N/A

Maximum number of entries that can be added to each network ACL

Basic/standard/WAF-enabled

500

-

N/A

Maximum number of listeners that can be associated with each custom security policy

Basic/standard/WAF-enabled

10

-

N/A

Maximum number of ACLs that can be associated with each ALB instance

Basic/standard/WAF-enabled

800

-

N/A

Resource quotas per region

Item

Edition

Default quota

Maximum quota

Quota increase method

Maximum number of custom security policies supported in each region

Basic/standard/WAF-enabled

50

-

N/A

Maximum number of health check templates supported in each region

Basic/standard/WAF-enabled

50

-

N/A

Maximum number of ALB instances supported in each region

Basic/standard/WAF-enabled

60

150

You can request a quota increase by using one of the following methods:

  • Go to the SLB Management page, click the ALB tab, and then increase the quota alb_quota_loadbalancers_num.

  • Log on to the Quota Center console and request a quota increase.

Maximum number of network ACLs supported in each region

Basic/standard/WAF-enabled

1,000

-

N/A

Maximum number of server groups supported in each region

Basic/standard/WAF-enabled

3,000

-

N/A