This API is used to change the number of reserved instances.

PUT /v2/{project_id}/fgs/functions/{function_urn}/reservedinstances

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID. For details, see Obtaining a Project ID.
function_urn	Yes	String	Function URN. For details, see the function model description.

**Table 2** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	Yes	String	User token. It can be obtained by calling the IAM API used to obtain a user token. The value of X-Subject-Token in the response header is the user token.
Content-Type	Yes	String	Message body type (format).

**Table 3** Request body parameters
Parameter	Mandatory	Type	Description
count	Yes	Integer	Number of reserved instances.
idle_mode	No	Boolean	Whether to enable the idle mode.

Status code: 200

**Table 4** Response body parameters
Parameter	Type	Description
count	Integer	Number of reserved instances.
idle_mode	Boolean	Whether to enable idle mode.

Status code: 400

**Table 5** Response body parameters
Parameter	Type	Description
error_code	String	Error code.
error_msg	String	Error message.

Status code: 401

**Table 6** Response body parameters
Parameter	Type	Description
error_code	String	Error code.
error_msg	String	Error message.

Status code: 403

**Table 7** Response body parameters
Parameter	Type	Description
error_code	String	Error code.
error_msg	String	Error message.

Status code: 404

**Table 8** Response body parameters
Parameter	Type	Description
error_code	String	Error code.
error_msg	String	Error message.

Status code: 500

**Table 9** Response body parameters
Parameter	Type	Description
error_code	String	Error code.
error_msg	String	Error message.

Update the number of a function's reserved instances to 3.

PUT https://{Endpoint}/v2/{project_id}/fgs/functions/{function_urn}/reservedinstances

{
  "count" : 3
}

Status code: 200

OK

{
  "count" : 2
}

Changing the Number of Reserved Instances