Quotas and Limits

Last updated：2023-04-09 15:53

This article introduces the usage restrictions of ZEGO Express SDK and room service, including frequency restrictions, string size, etc.

Room

ZEGO Room Service supports a single room with millions of users online at the same time. By default, the total QPS of all users in each room is 200, which means that up to 200 users can log in to the same room per second.
When the number of people in the room exceeds 500, the user login/logout callback and the user list callback will be closed. It is recommended that developers maintain the user list on their business server.

If you need to increase the limit, please contact ZEGO technical support to request an evaluation.

SDK Interface Name	Interface Description	Size Limit	Sending Frequency Limit (in the whole room)	remarks
sendBroadcastMessage	Broadcast message	If you access the SDK version 1.12.3 (released on 2020-08-06) and above, the message length cannot exceed 1 KB. If you connect to the SDK version below 1.12.3, the message length cannot exceed 512 B.	10 times/s	Reliable messages. The minimum interface call interval is 500 ms. It is not supported when the number of people online in the room exceeds 500.
sendBarrageMessage	Barrage message	If you access the SDK version 1.12.3 (released on 2020-08-06) and above, the message length cannot exceed 1 KB. If you connect to the SDK version below 1.12.3, the message length cannot exceed 512 B.	20 times/s	The message is not guaranteed to be reliable.
sendCustomCommand	Custom signaling	If you access the SDK version 1.12.3 (released on 2020-08-06) and above, the message length cannot exceed 1 KB. If you connect to the SDK version below 1.12.3, the message length cannot exceed 512 B.	When sending to a single person: 200 messages/s When sending to multiple people: 10 messages/s	Reliable messages. When the number of people online in the room exceeds 500, sending to multiple people is not supported.

SDK Interface Name

Interface Description

Size Limit

Sending Frequency Limit
(in the whole room)

remarks

Broadcast message

If you access the SDK version 1.12.3 (released on 2020-08-06) and above, the message length cannot exceed 1 KB.
If you connect to the SDK version below 1.12.3, the message length cannot exceed 512 B.

10 times/s

Reliable messages.

The minimum interface call interval is 500 ms.

It is not supported when the number of people online in the room exceeds 500.

Barrage message

If you access the SDK version 1.12.3 (released on 2020-08-06) and above, the message length cannot exceed 1 KB.
If you connect to the SDK version below 1.12.3, the message length cannot exceed 512 B.

20 times/s

The message is not guaranteed to be reliable.

Custom signaling

If you access the SDK version 1.12.3 (released on 2020-08-06) and above, the message length cannot exceed 1 KB.
If you connect to the SDK version below 1.12.3, the message length cannot exceed 512 B.

Reliable messages.

When the number of people online in the room exceeds 500, sending to multiple people is not supported.

SDK Interface Name	Interface Description	Size Limit	Sending Frequency Limit (in the whole room)
setRoomExtraInfo	Room additional information	key: The key value of the additional message of the room, which cannot exceed 10 bytes, and is not allowed to be an empty string. Only one type is allowed to be set in a room. value: The additional information content of the room, cannot exceed 128 bytes, and an empty string is allowed.	10 times/s