Cost-based SQL诊断引擎
本文介绍数据库自治服务DAS（Database Autonomy Service）的Cost-based SQL诊断引擎。背景信息 在业务系统中，数据库扮演着举足轻重的角色。和其它公司一样，在阿里巴巴业务场景下，大部分业务跟数据库有着非常紧密的关系，数据库一个微小...
自然语言到SQL语言转义（基于大语言模型的NL2SQL）
为了让不熟悉SQL语言的用户能方便地从数据库中取数分析，PolarDB for AI推出自研的基于大语言模型的自然语言到数据库查询语言转义（Large Language Model based Nature Language to SQL，简称LLM-based NL2SQL）解决方案，PolarDB for AI会...
基于代价的查询变换
本文档主要介绍了 PolarDB MySQL版 如何通过CBQT组件（Cost Based Query Transformation）实现基于代价的查询变换，从而大幅提升复杂查询的执行效率。前提条件 集群版本需为 PolarDB MySQL版 8.0版本且Revision version为8.0.2.2.1及以上。...
alicloud_fnf_schedules
Specifies whether to enable the time-based schedule you want to create.flow_name-The name of the flow bound to the time-based schedule you want to create.id-The ID of the Schedule.last_modified_time-The time when the time-...
alicloud_fnf_schedule
cron_expression-(Required)The CRON expression of the time-based schedule to be created.description-(Optional)The description of the time-based schedule to be created.enable-(Optional)Specifies whether to enable the time-...
RDMA日志传输
PolarDB MySQL版 通过RDMA技术对日志传输模块进行了优化，推出了RDMA日志传输（RDMA-based log shipment）技术方案。该方案 通过RDMA来替代传统的基于共享存储或TCP的传输方式,可以把日志传输吞吐量提升100%，并在此基础之上，把复制 延迟...
alicloud_vpn_pbr_route_entries
The data source lists a number of ...based route.route_dest-The destination CIDR block of the policy-based route.weight-The weight of the policy-based route.Valid values:0 and 100.status-The status of the VPN Pbr Route Entry.
DescribeScdnDomainConfigs
功能说明 名称 说明 referer_white_list_set refer白名单 referer_black_list_set refer黑名单 filetype_based_ttl_set 文件过期时间设置 path_based_ttl_set 目录过期时间设置 cc_defense 防频次攻击 oss_auth OSS鉴权Bucket ip_black_...
性能测试
based=1-group_reporting-directory="/mnt/cpfs/test"-name=Seq_Write_Testing 顺序读吞吐量：fio-direct=1-ioengine=libaio-iodepth=1-rw=read-bs=1m-size=1G-numjobs=256-runtime=600-time_based=1-group_reporting-directory="/mnt/cpfs...
使用Azure AD进行角色SSO的示例
本示例中，使用默认应用名称 Alibaba Cloud Service(Role-based SSO)，您也可以自定义应用名称。在 Alibaba Cloud Service(Role-based SSO)页面，单击左侧导航栏的 属性，复制并保存 对象ID。步骤二：配置Azure AD SSO 在 Alibaba Cloud ...
alicloud_nlb_load_balancer
The IPv6 address of a network-based server load balancer instance.public_ipv4_address-Public IPv4 address of a network-based server load balancer instance.Timeouts The timeouts block allows you to specify timeouts for ...
NAS性能测试
bs=4K-size=1G-time_based-runtime=60-name=Fio-directory=mnt 测试结果样例：随机读吞吐：fio-numjobs=1-iodepth=128-direct=1-ioengine=libaio-sync=1-rw=randread-bs=1M-size=1G-time_based-runtime=60-name=Fio-directory=mnt 测试结果...
alicloud_vpn_pbr_route_entry
hop-(Required,ForceNew)The next hop of the policy-based route.publish_vpc-(Required)Whether to issue the destination route to the VPC.route_source-(Required,ForceNew)The source CIDR block of the policy-based route.route_...
alicloud_cms_metric_rule_template
the system does not generate an alert rule for the metric based on the alert template.ALARM_TEMPLATE_FIRST:The metrics specified in the alert template take precedence.If a metric specified in the alert template does not ...
特征离散
取值如下：Isometric Discretization（等距离散）Isofrequecy Discretization（等频离散）Gini-gain-based Discretization（基于Gini增益离散）Entropy-gain-based Discretization（基于熵增益离散）离散区间个数 离散区间的个数。...
alicloud_config_aggregate_config_rule
scope-(Optional)The rule monitors resource group IDs,separated by commas,only applies to rules created based on managed rules.resource_types_scope-(Required)Resource types to be evaluated.Alibaba Cloud services that ...
关联Sequence
关联New Sequence或Time-based Sequence 自增列与New Sequence或Time-based Sequence关联，语法如下：CREATE TABLE(<column>.AUTO_INCREMENT[BY NEW|TIME],,.).AUTO_INCREMENT=说明 如果指定了BY TIME，即Time-based Sequence，则该列类型...
alicloud_config_rule
scope-(Optional)The rule monitors region IDs,separated by commas,only applies to rules created based on managed rules.resource_group_ids_scope-(Optional)The rule monitors resource group IDs,separated by commas,only applies...
测试块存储性能
ioengine=libaio-bs=4k-numjobs=4-time_based=1-runtime=1000-group_reporting-filename=dev/your_device-name=test 测试本地盘的顺序写吞吐量：sudo fio-direct=1-iodepth=128-rw=write-ioengine=libaio-bs=128k-numjobs=1-time_based=1-...
TPC-H Benchmark
Q2 select/*+SET_VAR(exec_mem_limit=8589934592,parallel_fragment_exec_instance_num=1,enable_vectorized_engine=true,batch_size=4096,disable_join_reorder=true,enable_cost_based_join_reorder=false,enable_projection=true)*/s_...
BatchSetScdnDomainConfigs
名称 说明 referer_white_list_set refer白名单 referer_black_list_set refer黑名单 filetype_based_ttl_set 文件过期时间设置 path_based_ttl_set 目录过期时间设置 cc_defense 防频次攻击 oss_auth OSS鉴权Bucket ip_black_list_set IP...
ALIYUN:Config:Rule
The rule monitors the tag value,only applies to rules created based on managed rules Value:Fn:GetAtt:ConfigRule-TagValueScope Description:Description:The description of the rule Value:Fn:GetAtt:ConfigRule-Description ...
alicloud_sag_qos_car
bandwidth_percent-(Optional)The minimum bandwidth percentage allowed for the stream specified in the quintuple rule.It is based on the maximum upstream bandwidth you set for the associated SAG instance.This parameter is ...
创建包正文
Package body for the 'emp_admin' package.-CREATE OR REPLACE PACKAGE BODY emp_admin IS-Function that queries the 'dept' table based on the department-number and returns the corresponding department name.-FUNCTION get_dept_...
概述
说明 单元化 Group Sequence从以下版本开始提供支持：V5.2：V5.2.7-1606682（2018.4.27）V5.3：V5.3.3-1670435（2018.8.15）Time-based Sequence（TIME）基于时间戳+节点编号+序列号组合而成的一种Sequence，保证全局唯一和宏观自增；...
CREATE SEQUENCE
本文介绍创建不同类型Sequence的方法。New Sequence 语法 CREATE...Time-based Sequence 语法 CREATE TIME SEQUENCE重要 存储 Time-based Sequence 值的列必须为BIGINT类型。示例 创建一个Time-based Sequence：CREATE TIME SEQUENCE seq3;
ALTER SEQUENCE
Time-based Sequence 语法 ALTER SEQUENCE[CHANGE TO NEW|GROUP]START WITH[INCREMENT BY][MAXVALUE][CYCLE|NOCYCLE]参数说明 参数 说明 START WITH 起始值，若未指定，则默认起始值为1。INCREMENT BY New Sequence每次增⻓时的增量值（或...
DescribeVsDomainConfigs-查询域名配置
path_based_ttl_set,oss_auth 功能说明 名称 参数 referer_white_list_set refer 白名单。referer_black_list_set refer 黑名单。filetype_based_ttl_set 文件过期时间设置。path_based_ttl_set 目录过期时间设置。cc_defense 防 CC 攻击。...
alicloud_cms_metric_rule_templates
A list of Cms Metric Rule Templates.Each element contains the following attributes:alert_templates-The details of alert rules that are generated based on the alert template.category-The abbreviation of the service name....
概述
否 是 所有整型 好 是 Time-based Sequence（TIME）是 否 宏观上单调递增，微观上非单调递增 是 仅支持BIGINT 差 否 New Sequence（NEW）全局唯一、连续、单调递增 的Sequence，产生的值是默认从1开始的自然数序列。说明 在5.4.14及以上...
GISV On-cloud Migration Service Content
1.Overview 1.1 Introduction GISV On-cloud Migration Service provides consulting and implementation services based on Alibaba Cloud's product system during the cloud migration process of customers' core systems.This service...
ALIYUN:VPC:VpnPbrRouteEntry
RouteSource":{"Type":"String","Description":"The source CIDR block of the policy-based route."},"PublishVpc":{"Type":"Boolean","Description":"Indicates whether to publish the destination route to the VPC.Valid values:true...
ALIYUN:DDoSPro:PremiumInstance
false Type:String DomainCount:Description:en:'The number of domain names that you want to protect.The value of DomainCount varies based on the value of ProductPlan.If you set ProductPlan to 0,you can set DomainCount to a ...
使用限制
本文将介绍使用Sequence过程中的注意事项及问题处理的方法。New Sequence New Sequence仅支持在5.4.14及以上版本的AUTO模式数据库中使用；...Time-based Sequence 将Time-based Sequence用于表中自增列时，该列必须使用BIGINT类型。
批量配置域名
Functions String 是[{"functionArgs":[{"argName":"file_type","argValue":"jpg"},{"argName":"ttl","argValue":"18"},{"argName":"weight","argValue":"30"}],"functionName":"filetype_based_ttl_set","configId":506*}]功能列表。...
ALIYUN:NLB:SecurityGroupAttachment
返回值 Fn:GetAtt 无 示例 YAML 格式 ROSTemplateFormatVersion:'2015-09-01' Parameters:LoadBalancerId:Description:en:The ID of the network-based server load balancer instance to be bound to the security group.Type:String ...
基于代价的SQL优化
AnalyticDB MySQL 采用基于代价的查询优化器（Cost-Based Optimizer），以获得最佳的查询执行计划，提高查询效率。AnalyticDB MySQL 基于代价的查询优化器具有以下优点：面向分布式设计 AnalyticDB MySQL 查询优化器会充分利用多机资源，...
GetCheckDetail-获取检查项详情
https://www.alibabacloud.com/help/en/object-storage-service/latest/tutorial-implement-data-sharing-across-departments-based-on-bucket-policies Solution object检查项风险的解决方案。Type string 检查项风险的解决方案类型。取值：...
ALIYUN:ApiGateway:Plugin
in.Valid values:ipControl:indicates IP address-based access control.trafficControl:indicates throttling.backendSignature:indicates backend signature.jwtAuth:indicates JWT(OpenId Connect).cors:indicates cross-origin ...
ALIYUN:VPC:EIPSegment
PayByBandwidth:Fees are charged based on bandwidth usage.This is the default value.PayByTraffic:Fees are charged based on data transfer.Note If the Netmode parameter is set to hybrid,InternetChargeType is set to ...
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