Notes and Constraints

Function Configuration

Table 1 Function configuration restrictions

Restriction Item	Description
Maximum number of versions allowed for a function	20 (including the latest version)
Maximum number of aliases allowed for a function	10 Each version can be associated with only one alias.
Maximum number of triggers allowed for a function version	10
Size of all environment variables of a function	4,096 characters
Maximum number of functions that can be created under an account	400
Maximum size of deployment packages allowed for an account	10GB
Number of concurrent executions per account	100 For more concurrent executions, .
Maximum number of reserved instances that an account can create	90 (Number of concurrent executions per account x 90%) For more reserved instances, .
Maximum number of tags that can be created for a function	20 To use the pre-defined tags of Tag Management Service (TMS), enable this service.
Network	If VPC access is enabled, the default NIC is disabled and the NIC bound to the VPC will be used instead. Whether public access is supported depends on the VPC.
Async notification	To avoid cyclic invocation, do not set two functions as asynchronous execution targets of each other.
Logs	The default log group will be unavailable if you switch it to another one or disable Collect Logs. Each function can have a maximum of 10 tags.

Function Code

Table 2 Function code restrictions

Restriction Item	Description
Size of a code deployment package (in ZIP or JAR format) that can be uploaded to the FunctionGraph console	40 MB
Size of a code deployment package (in ZIP or JAR format) that can be edited inline during function API invocation	50 MB
Size of exported resources	<= 50 MB
Size of an original code deployment package allowed during function API invocation	ZIP: 1,500 MB (after decompression) OBS bucket: 300 MB (after compression)
Maximum size of code that can be displayed on the console	20 MB
Private dependency	ZIP: 10 MB (If the file size exceeds 10 MB, upload it via OBS.) OBS: OBS URL with the file in ZIP format

Function Running Resources

Table 3 Function running resource restrictions

Restriction Item	Description
Ephemeral disk space (/tmp space)	512 MB
File descriptors	2048
Total number of processes and threads	1024
Maximum execution duration per request	259,200s If the execution takes longer than 90s, use asynchronous invocation. For longer execution duration, .
Valid payload size of invocation request body (synchronous invocation)	6 MB
Valid payload size of invocation response body (synchronous invocation)	6MB By default, the size of the returned string or the JSON string serialized from the response body is less than or equal to 6 MB. The actual data size varies depending on the backend settings of FunctionGraph. The backend determines the size of the serialized data with a byte-level deviation. The actual valid payload size is 6 MB ± 100 bytes.
Valid payload size of invocation request body (asynchronous invocation)	256 KB
Image size per function	10 GB
Instances per tenant	1000 For more instances, .
Max. memory per function	10 GB
Bandwidth	Unlimited
Single log size	Unlimited
Maximum execution duration of initializer	259,200s For longer initializer execution duration, .

last updated: 2025-06-16 12:54 UTC - commit: dbe2a2922fa04dc4627052d582919cd865ddd6ab