Querying Table Skew Rate or Dirty Page Rate
Function
This API is used to query the table skew rate or dirty page rate.
Calling Method
For details, see Calling APIs.
URI
GET /v1/{project_id}/clusters/{cluster_id}/dms/tables/statistic
| Parameter | Mandatory | Type | Description |
|---|---|---|---|
| project_id | Yes | String | Definition Project ID. To obtain the value, see Obtaining a Project ID. Constraints N/A Range N/A Default Value N/A |
| cluster_id | Yes | String | Definition Cluster ID. For details about how to obtain the value, see Obtaining the Cluster ID. Constraints The value must be a valid DWS cluster ID. Range It is a 36-digit UUID. Default Value N/A |
| Parameter | Mandatory | Type | Description |
|---|---|---|---|
| rate_type | Yes | String | Definition Query type. The value is fixed. Constraints N/A Range skew: table skew rate dirtyPage: dirty page rate Default Value N/A |
| offset | Yes | Integer | Definition Page offset, which starts from 0 (page number minus 1). Constraints N/A Range Greater than or equal to 0 Default Value 0 |
| limit | Yes | Integer | Definition Size of a single page. Constraints N/A Range Greater than 0 Default Value No limit. |
| order_by | No | String | Definition Sorting field. The value is fixed. Constraints N/A Range table_size: table size rate: table skew rate or dirty page rate Default Value N/A |
| sort_by | No | String | Definition Whether the order is ascending or descending. The value is fixed. Constraints N/A Range ASC DESC Default Value N/A |
| filter | No | String | Definition Query criteria. The value is fixed. Constraints N/A Range db_name schema_name table_name table_owner Default Value N/A |
| value | No | String | Definition Value of a filter criterion. Constraints N/A Range N/A Default Value N/A |
Request Parameters
None
Response Parameters
Status code: 200
| Parameter | Type | Description |
|---|---|---|
| collect_time | Long | Definition Data collection timestamp, in ms. Range N/A |
| data | Array of ListTablesStatisticDto objects | Definition List of table skew rates or dirty page rates. Range N/A |
| count | Integer | Definition Total number of rows in the list. Range N/A |
| Parameter | Type | Description |
|---|---|---|
| db_name | String | Definition Database name. Range N/A |
| schema_name | String | Definition Schema name. Range N/A |
| table_name | String | Definition Table name. Range N/A |
| table_owner | String | Definition Table owner. Range N/A |
| table_size | String | Definition Table size. Range N/A |
| skew_rate | Double | Definition Skew rate. Range N/A |
| dirty_page_rate | Double | Definition Dirty page rate. Range N/A |
Example Requests
https://{Endpoint}/v1/{project_id}/clusters/{cluster_id}/dms/tables/statistic?rate_type=dirtyPage&filter=&value=&offset=0&limit=1&order_by=&sort_by=ASC Example Responses
Status code: 200
Query succeeded.
{
"collect_time" : 0,
"data" : [ {
"db_name" : "postgres",
"schema_name" : "pmk",
"table_name" : "pmk_snapshot_coordinator_stat",
"table_owner" : "Ruby",
"table_size" : "224 KB",
"skew_rate" : null,
"dirty_page_rate" : 0.77
} ],
"count" : 3
} SDK Sample Code
The SDK sample code is as follows.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | package com.huaweicloud.sdk.test; import com.huaweicloud.sdk.core.auth.ICredential; import com.huaweicloud.sdk.core.auth.BasicCredentials; import com.huaweicloud.sdk.core.exception.ConnectionException; import com.huaweicloud.sdk.core.exception.RequestTimeoutException; import com.huaweicloud.sdk.core.exception.ServiceResponseException; import com.huaweicloud.sdk.dws.v2.region.DwsRegion; import com.huaweicloud.sdk.dws.v2.*; import com.huaweicloud.sdk.dws.v2.model.*; public class ListTablesStatisticSolution { public static void main(String[] args) { // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security. // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment String ak = System.getenv("CLOUD_SDK_AK"); String sk = System.getenv("CLOUD_SDK_SK"); String projectId = "{project_id}"; ICredential auth = new BasicCredentials() .withProjectId(projectId) .withAk(ak) .withSk(sk); DwsClient client = DwsClient.newBuilder() .withCredential(auth) .withRegion(DwsRegion.valueOf("<YOUR REGION>")) .build(); ListTablesStatisticRequest request = new ListTablesStatisticRequest(); request.withClusterId("{cluster_id}"); try { ListTablesStatisticResponse response = client.listTablesStatistic(request); System.out.println(response.toString()); } catch (ConnectionException e) { e.printStackTrace(); } catch (RequestTimeoutException e) { e.printStackTrace(); } catch (ServiceResponseException e) { e.printStackTrace(); System.out.println(e.getHttpStatusCode()); System.out.println(e.getRequestId()); System.out.println(e.getErrorCode()); System.out.println(e.getErrorMsg()); } } } |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 | # coding: utf-8 import os from huaweicloudsdkcore.auth.credentials import BasicCredentials from huaweicloudsdkdws.v2.region.dws_region import DwsRegion from huaweicloudsdkcore.exceptions import exceptions from huaweicloudsdkdws.v2 import * if __name__ == "__main__": # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security. # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment ak = os.environ["CLOUD_SDK_AK"] sk = os.environ["CLOUD_SDK_SK"] projectId = "{project_id}" credentials = BasicCredentials(ak, sk, projectId) client = DwsClient.new_builder() \ .with_credentials(credentials) \ .with_region(DwsRegion.value_of("<YOUR REGION>")) \ .build() try: request = ListTablesStatisticRequest() request.cluster_id = "{cluster_id}" response = client.list_tables_statistic(request) print(response) except exceptions.ClientRequestException as e: print(e.status_code) print(e.request_id) print(e.error_code) print(e.error_msg) |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | package main import ( "fmt" "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic" dws "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dws/v2" "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dws/v2/model" region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dws/v2/region" ) func main() { // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security. // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment ak := os.Getenv("CLOUD_SDK_AK") sk := os.Getenv("CLOUD_SDK_SK") projectId := "{project_id}" auth := basic.NewCredentialsBuilder(). WithAk(ak). WithSk(sk). WithProjectId(projectId). Build() client := dws.NewDwsClient( dws.DwsClientBuilder(). WithRegion(region.ValueOf("<YOUR REGION>")). WithCredential(auth). Build()) request := &model.ListTablesStatisticRequest{} request.ClusterId = "{cluster_id}" response, err := client.ListTablesStatistic(request) if err == nil { fmt.Printf("%+v\n", response) } else { fmt.Println(err) } } |
For SDK sample code of more programming languages, see the Sample Code tab in API Explorer. SDK sample code can be automatically generated.
Status Codes
| Status Code | Description |
|---|---|
| 200 | Query succeeded. |
| 400 | Request error. |
| 401 | Authentication failed. |
| 403 | You do not have required permissions. |
| 404 | No resources found. |
| 500 | Internal server error. |
| 503 | Service unavailable. |
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