You can call this operation to set the Java virtual machine (JVM) parameters for an application or an instance group.

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request headers

This operation only uses common request headers. For more information, see the Common request parameters topic.

Request syntax

POST /pop/v5/app/app_jvm_config HTTPS|HTTP

Request parameters

Parameter Type Required Example Description
AppId String Yes c627c157-560d-*************

The ID of the application for which you want to set the JVM parameters.
GroupId String No ""

The ID of the instance group for which you want to set the JVM parameters. If you set this parameter to a specific ID, the JVM parameters are set for the specified instance group. If you set this parameter to "", the JVM parameters are set for the application.

Options String No ""

Custom JVM parameters that you want to set. Note: 1. If this parameter is not specified in the group configuration, the value specified in the application configuration is applied. 2. If this parameter is not specified in the application configuration, the default value is applied.

MinHeapSize Integer No 500

The initial size of the heap that you want to set. Unit: MB. Note: 1. If this parameter is not specified in the group configuration, the value specified in the application configuration is applied. 2. If this parameter is not specified in the application configuration, the default value is applied.

MaxPermSize Integer No 1000

The maximum size of the permanent generation heap that you want to set. Unit: MB. Note: 1. If this parameter is not specified in the group configuration, the value specified in the application configuration is applied. 2. If this parameter is not specified in the application configuration, the default value is applied.

MaxHeapSize Integer No 500

The maximum size of the heap that you want to set. Unit: MB. Note: 1. If this parameter is not specified in the group configuration, the value specified in the application configuration is applied. 2. If this parameter is not specified in the application configuration, the default value is applied.

Response parameters

Parameter Type Example Description
Code Integer 200

The returned code.
Message String success

The returned message.
RequestId String D16979DC-4D42-********************
JvmConfiguration Struct

The JVM parameters returned.
Options String ""

Custom JVM parameters that was set.
MinHeapSize Integer 500

The initial size of the heap that was set. Unit: MB
MaxPermSize Integer 1000

The maximum size of the permanent generation heap that was set. Unit: MB
MaxHeapSize Integer 500

The maximum size of the heap that was set. Unit: MB

Examples

Sample requests

POST /pop/v5/app/app_jvm_config HTTP/1.1
Common request headers
{
  "AppId": ""
}

Sample success responses

JSON format 

{
    "Message": "success",
    "JvmConfiguration": {
        "MaxPermSize": 1000,
        "MaxHeapSize": 500,
        "MinHeapSize": 500,
        "Options": ""
    },
    "Code": 200
}

XML format 

<Message>success</Message>
<JvmConfiguration>
    <MaxPermSize>1000</MaxPermSize>
    <MaxHeapSize>500</MaxHeapSize>
    <MinHeapSize>500</MinHeapSize>
    <Options/>
</JvmConfiguration>
<Code>200</Code>

Error codes

For a list of error codes, visit the API Error Center.