Limits

Last Updated: Nov 23, 2017

ResourceLimitException
ECS instances added to a Server Load Balancer instance Must have at least one ECS instance, and the region must be the same for the ECS instance and Server Load Balancer instance. No
Types of a Server Load Balancer instance Internet/intranet No
Billing methods By traffic or bandwidth No
Public network bandwidth range for a Server Load Balancer instance (Pay by bandwidth) 1 to 5000 MB, the default is 1 MB No
Default quota of Pay-As-You-Go instances 60 Submit a ticket to apply for more
Server Load Balancer instance name The name can be 1-80 characters in length, and include letters, digits, hyphens (-), backslashes (/), periods (.), and underscores (_). No
Number of listeners added in a Server Load Balancer instance 50 No
Maximum number of domain name/URL forwarding rules added to a layer-7 listener 20 Submit a ticket to apply for more
Supported protocols HTTP/HTTPS/TCP/UDP No
Front-end/backend port range used in a listener(public cloud) 1 to 65535 No
Front-end/backend port range used in a listener (Financial Cloud) 80, 443, 2800 to 3300, 5000 to 10000, 13000 to 14000 No
Supported scheduling algorithms Round robin, weighted round robin (WRR), weighted least connections (WLC) No
Cookie processing in HTTP session persistence insert/server, the default is insert No
Cookie timeout in HTTP session persistence 1 to 86400, the default is 3600 No
Cookie name in HTTP session persistence

The name can be 1 to 200 characters in length, and must comply with RFC2965.

It can only contain ASCII English letters and digits.

It cannot contain commas, semicolons, spaces, or begin with a dollar symbol ($).

No
Health check port for HTTP protocol 1 to 65,535 (the default is the backend server port) No
Health check domain name for HTTP protocol The length can be 1 to 80 characters in length, and include letters, digits, hyphens (-), and periods (.). No
Health check URI for HTTP protocol The URU can be 1-80 characters in length, and include letters, digits, hyphens (-), backslashes (/), periods (.), percent signs (%), question marks (?), number signs (#), and ampersands (&). No
Health check timeout for HTTP protocol 1 to 300s, the default is 5 No
Health check interval for HTTP protocol 1 to 50s, the default is 2 No
Healthiness threshold for HTTP protocol health check 2 to 10, the default is 3 No
Unhealthiness threshold for HTTP protocol health check 2 to 10, the default is 3 No
Session timeout for TCP protocol 1 to 3600s No
Health check port for TCP protocol 1 to 65,535 (the default is the backend server port) No
Health check timeout for TCP protocol 1 to 300s, the default is 5 No
Health check interval for HTTP protocol 1 to 50s, the default is 2 No
Healthiness threshold for TCP protocol health check 2 to 10, the default is 3 No
Unhealthiness threshold for TCP protocol health check 2 to 10, the default is 3 No
Health check port for UDP protocol 1 to 65,535 (the default is the backend server port) No
Health check timeout for UDP protocol 1 to 300s, the default is 10 No
Health check interval for UDP protocol 1 to 50s, the default is 10 No
Healthiness threshold for TCP protocol health check 2 to 10, the default is 3 No
Unhealthiness threshold for UDP protocol health check 2 to 10, the default is 3 No
Number of backend ECS instances that can be added or deleted in batches 20 No
API access frequency for a single key 5,000 times/day Currently, an automatic process is not available. Contact customer manager for help.
Maximum number of certificates that can be uploaded by a single user 100 Currently, an automatic process is not available. Contact customer manager for help.
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