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- Introduction
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- DescribeMaintainPeriod
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- CreateClusters
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- Other APIs
- CloseWan
- CreateClusterDatabase
- DeleteClusterDatabase
- DescribeClusterDetailDatabases
- ModifyClusterDatabase
- OpenWan
- OpenClusterReadOnlyInstanceGroupAccess
- OpenReadOnlyInstanceExclusiveAccess
- ModifyDBInstanceSecurityGroups
- DescribeProjectSecurityGroups
- DescribeDBSecurityGroups
- SwitchProxyVpc
- DescribeFlow
- DescribeZones
- SwitchClusterVpc
- ModifyVipVport
- Data Types
- Error Codes
- 常见问题
- TDSQL-C 政策
- 词汇表
- 联系我们
- 动态与公告
- 产品简介
- 自研内核
- 购买指南
- 快速入门
- 数据库审计
- Serverless 服务
- 操作指南
- 最佳实践
- 白皮书
- API 文档
- History
- Introduction
- API Category
- Making API Requests
- Instance APIs
- CloseClusterPasswordComplexity
- CopyClusterPasswordComplexity
- DescribeClusterPasswordComplexity
- ModifyClusterPasswordComplexity
- OpenClusterPasswordComplexity
- UpgradeClusterVersion
- UpgradeInstance
- SetRenewFlag
- OfflineCluster
- ModifyMaintainPeriodConfig
- IsolateInstance
- IsolateCluster
- DescribeMaintainPeriod
- DescribeInstanceSpecs
- DescribeClusters
- DescribeClusterDetail
- CreateClusters
- AddInstances
- OfflineInstance
- DescribeInstanceDetail
- DescribeClusterInstanceGrps
- DescribeInstances
- ActivateInstance
- ModifyInstanceName
- ModifyClusterName
- SearchClusterTables
- SearchClusterDatabases
- RestartInstance
- Multi-AZ APIs
- Account APIs
- Audit APIs
- Database Proxy APIs
- Backup and Restoration APIs
- Parameter Management APIs
- Performance Analysis APIs
- Billing APIs
- Serverless APIs
- ResourcePackage APIs
- Other APIs
- CloseWan
- CreateClusterDatabase
- DeleteClusterDatabase
- DescribeClusterDetailDatabases
- ModifyClusterDatabase
- OpenWan
- OpenClusterReadOnlyInstanceGroupAccess
- OpenReadOnlyInstanceExclusiveAccess
- ModifyDBInstanceSecurityGroups
- DescribeProjectSecurityGroups
- DescribeDBSecurityGroups
- SwitchProxyVpc
- DescribeFlow
- DescribeZones
- SwitchClusterVpc
- ModifyVipVport
- Data Types
- Error Codes
- 常见问题
- TDSQL-C 政策
- 词汇表
- 联系我们
功能介绍
针对于频繁更新或秒杀类等业务场景，大幅度优化对于热点行数据的 update 操作性能。当开启热点更新自动探测时，系统会自动探测是否有单行的热点更新，如果有，则会让大量的并发 update 排队执行，以减少由于大量行锁造成的并发性能下降。
支持版本
内核版本 TDSQL-C MySQL 版5.7 2.0.23/2.1.9及以上。
内核版本 TDSQL-C MySQL 版8.0 3.1.5及以上。
适用场景
适用于单点或多点带主键的更新压力非常大的场景（秒杀场景）。
参数说明
参数名 | 动态 | 类型 | 默认 | 参数值范围 | 说明 |
cdb_sql_filter_enable | yes | bool | off | on/off | 是否打开热点更新功能 |
使用说明
是
否
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