Use DescribeHotKeys to query hot keys - Database Autonomy Service - Alibaba Cloud - Database Autonomy Service

Queries the hot keys of a Redis instance by calling the DescribeHotKeys operation.

Operation description

Before you begin:

When using the Alibaba Cloud SDK, make sure the version of aliyun-sdk-core is later than 4.3.3. Use the latest version.
The version of the DAS SDK must be 1.0.2 or later.
When calling DAS by using the SDK, set the region to cn-shanghai.
This operation applies only to the following Redis instances:
- The instance is a Redis Community Edition instance or a Tair (Redis® OSS-Compatible) memory-optimized instance.
- The minor engine version of the instance is the latest.

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RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.
API: The API that you can call to perform the action.
Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.
Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.
- For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.
- For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.
Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.
Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

hdm:DescribeHotKeys

get

*All Resource

*

None

Request parameters

Parameter	Type	Required	Description	Example
InstanceId	string	Yes	The instance ID of the Redis instance.	r-bp18ff4a195d****
NodeId	string	No	The ID of the data shard in the Redis instance.	r-x****-db-0

Response elements

Element	Type	Description	Example
	object
Message	string	The returned message. Note If the request is successful, Successful is returned. If the request fails, an error message such as an error code is returned.	Successful
RequestId	string	The request ID.	B6D17591-B48B-4D31-9CD6-9B9796B2****
Data	object
HotKey	array<object>	The list of detailed information.
	object	The result set.
Key	string	The key.	abc:def:eng
Db	integer	The DB where the key is stored.	0
Hot	string	The access frequency of the key, which is the number of accesses per second.	5500~6000
KeyType	string	The type of the key.	zset
Size	integer	The number of elements.	2
InBytes	integer		85766
OutBytes	integer		1054688
NodeId	string		r-x****-db-0
Category	string		qps
Code	string	The returned status code.	200
Success	string	Indicates whether the request is successful. Valid values: true: The request is successful. false: The request fails.	true

Examples

Success response

JSON format

{
  "Message": "Successful",
  "RequestId": "B6D17591-B48B-4D31-9CD6-9B9796B2****",
  "Data": {
    "HotKey": [
      {
        "Key": "abc:def:eng",
        "Db": 0,
        "Hot": "5500~6000",
        "KeyType": "zset",
        "Size": 2,
        "InBytes": 85766,
        "OutBytes": 1054688,
        "NodeId": "r-x****-db-0",
        "Category": "qps"
      }
    ]
  },
  "Code": "200",
  "Success": "true"
}

Error codes

HTTP status code	Error code	Error message	Description
400	InvalidParams	The request parameters are invalid.
403	NoPermission	You are not authorized to do this action.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.