Updated on 2026-08-25 GMT+08:00

Querying Blocked Session Count Trend

Function

This API is used to query the blocked session count trend.

Authorization Information

Each account has all the permissions required to call all APIs, but IAM users must be assigned the required permissions.

If you are using role/policy-based authorization, see Permissions and Supported Actions for details on the required permissions.
If you are using identity policy-based authorization, the permission listed below is required.

Action

Access Level

Resource Type (*: required)

Condition Key

Alias

Dependencies

das::showCloudDBAInfo

read

-

-

-

-

Action	Access Level	Resource Type (*: required)	Condition Key	Alias	Dependencies
das::showCloudDBAInfo	read	-	-	-	-

URI

GET /v3/{project_id}/instances/{instance_id}/lock-blocking/get-lock-blocking-trend

**Table 1** URI parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Definition Project ID of a tenant in a region. To obtain the value, see Obtaining a Project ID. Constraints N/A Range The value can contain 32 characters. Only letters and digits are allowed. Default Value N/A
instance_id	Yes	String	Definition Instance ID, which uniquely identifies an instance. Constraints N/A Range The value can contain 32 characters. Only letters and digits are allowed. Default Value N/A

Request Parameters

**Table 2** Query parameters
Parameter	Mandatory	Type	Description
start_time	Yes	Long	Definition Start timestamp (ms). Constraints N/A Range N/A Default Value N/A
end_time	Yes	Long	Definition End timestamp (ms). Constraints N/A Range N/A Default Value N/A

Response Parameters

Status code: 200

**Table 3** Response body parameters
Parameter	Type	Description
trend_list	Array of objects in Table 4	Definition Trend list. Range N/A
interval_millis	Long	Definition Time Interval (ms). Range N/A

**Table 4** trend
Parameter	Type	Description
collect_time	Long	Definition Collection time (ms). Range N/A
total_lock_blocking_count	Long	Definition Total number of blocked sessions. Range N/A
async_io_completion_count	Long	Definition Number of ASYNC_IO_COMPLETION waits. Range N/A
async_network_io_count	Long	Definition Number of ASYNC_NETWORK_IO waits. Range N/A
cxconsumer_count	Long	Definition Number of CXCONSUMER waits. Range N/A
cxpacket_count	Long	Definition Number of CXPACKET waits. Range N/A
dtc_count	Long	Definition Number of DTC waits. Range N/A
lck_m_bu_count	Long	Definition Number of LCK_M_BU waits. Range N/A
lck_m_is_count	Long	Definition Number of LCK_M_IS waits. Range N/A
lck_m_iu_count	Long	Definition Number of LCK_M_IU waits. Range N/A
lck_m_ix_count	Long	Definition Number of LCK_M_IX waits. Range N/A
other_count	Long	Definition Number of blocked sessions caused by other waits. Range N/A

Example Requests

GET https://das.cn-north-1.myhuaweicloud.com/v3/054e292c9880d4992f02c0196d3ea468/instances/298ad59e995d48b185188c41d5b40268in04/lock-blocking/get-lock-blocking-trend?start_time=1764143240272&end_time=1764229640272

Example Responses

Status code: 200

Success.

{
    "trend_list": [
        {
            "collect_time": 1764147600000,
            "total_lock_blocking_count": 0,
            "async_io_completion_count": 0,
            "async_network_io_count": 0,
            "cxconsumer_count": 0,
            "cxpacket_count": 0,
            "dtc_count": 0,
            "lck_m_bu_count": 0,
            "lck_m_is_count": 0,
            "lck_m_iu_count": 0,
            "lck_m_ix_count": 0,
            "other_count": 0
        }
    ],
    "interval_millis": 3600000
}

Status Codes

Status Code	Description
200	Success.
400	Client error.
500	Server error.

Error Codes

See Error Codes.

Parent topic: Intelligent O&M