DescribeTopHotKeys - Database Autonomy Service - Alibaba Cloud Documentation Center

Retrieves the top 100 hot keys within a specific period.

Operation description

A key is recorded as a hot key if its queries per second (QPS) exceeds 3,000.

If you use an Alibaba Cloud software development kit (SDK), ensure that the version of aliyun-sdk-core is later than 4.3.3. We recommend that you use the latest version.
The version of the DAS SDK must be 1.0.2 or later.
When you use an SDK to call the DAS service, you must set the region to cn-shanghai.
This operation applies only to Redis instances that meet the following requirements:
- The instance is an open source Redis instance or a Tair memory-optimized instance.
- The instance runs on the latest minor version.

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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:DescribeTopHotKeys

get

*All Resource

*

None

Request parameters

Parameter	Type	Required	Description	Example
ConsoleContext	string	No	A reserved parameter.	None
InstanceId	string	Yes	The ID of the Redis instance.	r-bp18ff4a195d****
NodeId	string	No	The ID of the data shard of the Redis instance.	r-****-db-0
StartTime	string	Yes	The beginning of the time range to query. Specify the time in the UNIX timestamp format. The time must be in milliseconds.	1596177993000
EndTime	string	Yes	The end of the time range to query. Specify the time in the UNIX timestamp format. The time must be in milliseconds. Note The end time must be later than the start time. You can query data only within the last four days. The maximum time range that can be specified between StartTime and EndTime is three hours.	1596177993001

Response elements

Element	Type	Description	Example
	object
Message	string	The returned message.	Successful
RequestId	string	The request ID.	B6D17591-B48B-4D31-9CD6-9B9796B2****
Data	object
HotKey	array<object>	The list of hot keys.
	object	The list of hot keys.
Db	integer	The database in which the key is stored.	0
Key	string	The name of the key.	abc:def:eng
Hot	string	The access frequency of the key. This value indicates the number of times the key is accessed per second.	5500~6000
KeyType	string	The type of the key.	zset
Lfu	integer	The statistical value of the Least Frequently Used (LFU) algorithm.	253
NodeId	string	The ID of the data shard of the Redis instance.	r-x****-db-0
Code	string	The response code.	200
Success	string	Indicates whether the request was successful. true: The request was successful. false: The request failed.	true

Examples

Success response

JSON format

{
  "Message": "Successful",
  "RequestId": "B6D17591-B48B-4D31-9CD6-9B9796B2****",
  "Data": {
    "HotKey": [
      {
        "Db": 0,
        "Key": "abc:def:eng",
        "Hot": "5500~6000",
        "KeyType": "zset",
        "Lfu": 253,
        "NodeId": "r-x****-db-0"
      }
    ]
  },
  "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.