For each user account, the SCF has a certain quota limit.
User Account Quota Limits
Content | Default Quota Limit |
Total function code size per region | 100GB |
Total function concurrency quota per region | 128,000 MB(Guangzhou, Shanghai, Beijing, Chengdu, and Hong Kong (China)) |
| 64,000 MB(Mumbai, Singapore, Tokyo, Toronto, Silicon Valley, Frankfurt, Shenzhen Finance, and Shanghai Finance) |
Number of namespaces per region | 5 |
Total concurrent function quota per namespace | |
Number of functions per namespace | 50 |
Function Quota Limits
Content | Default Quota Limit |
Function name length limit | 60 characters, the total character length of the namespace name + function name should not exceed 118. |
Maximum code size (including bound layers) per function (version) before compression | 500MB |
Maximum number of same-type triggers per function | 10 |
Maximum environment variable size per function | 4KB |
Number of layer versions bound to one function version | 5 |
Layer Quota Limits
Content | Default Quota Limit |
Number of layers per region | 20 |
Number of versions per layer | 200 |
Note:
SCF currently supports one million MB-level concurrency, which can effectively support scenarios with high concurrency demand such as ecommerce promotions and parallel processing of medical and biological data.
The concurrency quota per region on the SCF platform is shared by all functions by default. You can customize the function concurrency to meet your actual needs. If you want to increase the quotas or add concurrency quota management capabilities at the namespace granularity, you can directly purchase a function package.
In SCF, a COS trigger has limits in two dimensions: SCF and COS, as detailed below:
SCF dimension: one function can be bound to 10 COS triggers at most.
COS dimension: Only one function can be bound to the same event and prefix/suffix rules in a single COS bucket.
Function Runtime Environment Limits
Content | Quota Limit |
Allocated memory | Minimum: 64 MB, maximum: 3,072 MB, in increments of 128 MB starting from 128 MB |
Temporary cache space; i.e., size of the /tmp directory | 512MB |
Timeout period | Minimum: 1 second, maximum: 900 seconds |
Number of file descriptors | 1024 |
Total processes and threads | 1024 |
Sync request event size | 6MB |
Sync request response size | 6MB |
Async request event size | 128KB |
Note
If the size of a Base64-encoded file is below 6 MB, you can pass the encoded file to SCF through API Gateway. Otherwise, we recommend you upload the file to COS and pass the object address to SCF first. Then, SCF will pull the file from COS to complete the upload.