System Limits
Last updated:2025-12-31 11:42:04
Except for the pricing documentation specified in each package, CloudBase (TCB) imposes certain system parameter limitations for each user account (all version quotas adhere to the same system parameter limitations). This document provides a detailed introduction to the specifications and limitations of each feature, with the limitation in the table indicating the upper limit of the system metrics.
Environment
Each account can have a maximum of 50 environments simultaneously, including environments from mini-programs of TCB and other channels.
Cloud Database
System limitations for cloud databases are detailed in the table below:
System Parameter | Limitation Explanation |
Single outbound packet for database traffic | 16M |
Number of single-collection indexes | 20 |
Cloud Storage
Limitations for cloud storage apply to cloud storage and static website hosting services of TCB. System limitations for cloud storage are detailed in the table below:
System Parameter | Limitation Explanation |
Upload object size | The maximum size for uploading a single object through the console is 512 GB. The maximum size for uploading a single object through the SDK is 48.82 TB (50,000 GB). |
Upper limit of objects for batch deletion (initiated through SDK) | 50 |
Upper limit of temporary file links that can be obtained in a single request | 50 |
Note:
Cloud storage uses Tencent Cloud cloud storage resources to provide services for users: object storage assigns unified numbers to stored data, allowing other systems to access it. It is important to note that the stored data here can be a file, a part of a file, or a combination of files. All of these are collectively referred to as objects.
In the cloud storage, the object serves as the basic storage unit. Each object consists of ObjectKey, Value, and Metadata.
ObjectKey: the unique identifier of an object in the bucket, which can be understood as the file path.
Value: refers to the uploaded object itself, which can be understood as the file content.
Metadata: a set of key-value pairs, which can be understood as the attributes of a file. You can configure them when uploading an object.
Serverless Cloud Function (SCF)
System limitations for SCF are detailed in the table below:
System Parameter | Limitation Explanation |
Number of concurrent executions for a single cloud function | 1,000 |
Number of triggers for a single function | 10 |
Code size for a single function (upload methods: CLI, SDK, and console) | 50MB |
Environment variable size for a single function | 4KB |
Memory allocation | Minimum value: 128 MB; maximum value: 2,048 MB |
Timeout time | Minimum value: 1s; maximum value: 60s |
Synchronization request event size | 6MB |
Synchronization request response size | 6MB |
Number of fixed public IP addresses | 5 |
Cloud Management
System limitations for cloud management are detailed in the table below:
System Parameter | Limitation Explanation |
Combination of environment + VPC | 20 |
Total number of Tencent Container Registry (TCR) image repositories | 500 |
Code package size (local code upload method) | 500MB |
Notes:
TCR is the abbreviation of Tencent Container Registry, providing container image management and distribution services. Cloud management uses the Personal Edition TCR; each cloud management service corresponds to an image repository.
Under the same account, up to 20 combinations of environment and VPC are allowed. When you create a service and choose to let the system automatically create a cloud management network, a new VPC is generated.
The following are several situations that may cause service creation failures due to exceeding the quota limit:
Situation 1:
In the same environment, 20 different VPCs have been used for service deployment.
If you attempt to create a service in the environment and choose the 21st unused VPC or let the system create a cloud management network, the quota limit will be exceeded.
Situation 2:
In 20 different environments, the same VPC is used for service deployment in each environment.
If a service is created in the 21st new environment, or if a service is created in one of the existing 20 environments using a VPC that has not been used in the current environment or letting the system to create a cloud management network, the quota limit will also be exceeded.
Hybrid situation:
If the above two situations occur simultaneously, resulting in the total number of environment and VPC combinations exceeding 20, the quota limit will also be exceeded.
To avoid causing these errors, ensure that the combination of environment and VPC does not exceed 20 when a service is created.
Log Management
System limitations for log management are detailed in the table below:
System Parameter | Limitation Explanation |
Time range of log search in the console | Custom settings. 1–3600 days. |
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