Elastic Compute Service (ECS)
Container Compute Service (ACS)
Queries the hot keys and the large keys in the memory in real time.
Operation description
This operation sorts list, hash, set, and zset keys based on the number of elements contained in these keys. The top three keys that contain the most elements are considered large keys. If the number of queries per second (QPS) of a key is greater than 3,000, the key is considered a hot key.
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If you use an Alibaba Cloud SDK, make sure that the aliyun-sdk-core version is later than 4.3.3. We recommend that you use the latest version.
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The version of Database Autonomy Service (DAS) SDK must be 1.0.2 or later.
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If you use an SDK to call API operations of DAS, you must set the region ID to cn-shanghai.
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This operation is available only for ApsaraDB for Redis instances that meet the following requirements:
- The instance is a Community Edition instance that uses a major version of 5.0 or later or a performance-enhanced instance of the Enhanced Edition (Tair).
- The ApsaraDB for Redis instance is updated to the latest minor version.
Debugging
Authorization information
The following table shows the authorization information corresponding to the API. The authorization information can be used in the Action policy element to grant a RAM user or RAM role the permissions to call this API operation. Description:
- Operation: the value that you can use in the Action element to specify the operation on a resource.
- Access level: the access level of each operation. The levels are read, write, and list.
- Resource type: the type of the resource on which you can authorize the RAM user or the RAM role to perform the operation. Take note of the following items:
- For mandatory resource types, indicate with a prefix of * .
- If the permissions cannot be granted at the resource level,
All Resourcesis used in the Resource type column of the operation.
- Condition Key: the condition key that is defined by the cloud service.
- Associated operation: other operations that the RAM user or the RAM role must have permissions to perform to complete the operation. To complete the operation, the RAM user or the RAM role must have the permissions to perform the associated operations.
| Operation | Access level | Resource type | Condition key | Associated operation |
|---|
| Operation | Access level | Resource type | Condition key | Associated operation |
|---|---|---|---|---|
| hdm:DescribeHotBigKeys | get | *All Resources * |
| none |
Request parameters
| Parameter | Type | Required | Description | Example |
|---|
| Parameter | Type | Required | Description | Example |
|---|---|---|---|---|
| ConsoleContext | string | No | The reserved parameter. | None |
| InstanceId | string | Yes | The ID of the ApsaraDB for Redis instance. | r-bp18ff4a195d**** |
| NodeId | string | No | The ID of the data shard on the ApsaraDB for Redis instance. | r-****-db-0 |
Response parameters
Examples
Sample success responses
JSONformat
{
"Message": "Successful",
"RequestId": "B6D17591-B48B-4D31-9CD6-9B9796B2****",
"Data": {
"HotKeys": {
"HotKey": [
{
"Key": "abc:def:eng",
"Db": 0,
"Hot": "5500~6000",
"KeyType": "zset",
"Lfu": 253,
"NodeId": "r-x****-db-0"
}
]
},
"BigKeys": {
"BigKey": [
{
"Db": 0,
"Key": "abc:def:eng",
"KeyType": "zset",
"Size": 2,
"NodeId": "r-x****-db-0"
}
]
},
"HotKeyMsg": "current version doesn't support",
"BigKeyMsg": "current version doesn't support"
},
"Code": "200",
"Success": "true"
}Error codes
| HTTP status code | Error code | Error message |
|---|
| HTTP status code | Error code | Error message |
|---|---|---|
| 400 | InvalidParams | The request parameters are invalid. |
| 403 | NoPermission | You are not authorized to do this action. |
For a list of error codes, visit the Service error codes.
Change history
| Change time | Summary of changes | Operation |
|---|
| Change time | Summary of changes | Operation |
|---|
