- Release Notes and Announcements
- Release Notes
- Announcements
- Commercial Billing for Database Proxy
- TencentDB for MySQL Audit Upgrade
- Added Authentication APIs
- API Authentication Upgrade
- TencentDB for MySQL API 2.0 Discontinuation
- Monitoring Module Upgrade in Shanghai Region
- Monitoring Metric Optimization
- Network Architecture Upgrade
- Change of APIs for Querying the Specifications of Purchasable Database Instances
- Replacement of Certain Old Database Proxy APIs
- Added Advanced Monitoring Metrics
- Change of Calculation Formula for Memory Utilization
- Monitoring Module Upgrade and Optimization in Guangzhou and Shanghai Regions
- Monitoring Module Upgrade
- Parameter Template and Instance Purchase Process Optimization
- Binlog Will Take up Disk Space
- User Tutorial
- Product Introduction
- Tencent Kernel TXSQL
- Overview
- Kernel Version Release Notes
- Functionality Features
- Performance Features
- Security Features
- Stability Features
- TXRocks Engine
- Purchase Guide
- Getting Started
- Database Audit
- Operation Guide
- Use Limits
- Operation Overview
- Instance Management and Maintenance
- Instance Upgrade
- CPU Elastic Expansion
- Read-Only/Disaster Recovery Instances
- Database Proxy
- Account Management
- Database Management Center (DMC)
- Parameter Configuration
- Network and Security
- Backup and Rollback
- Data Migration
- Monitoring and Alarms
- Operation Logs
- Tag
- Best Practices
- Usage Specifications of TencentDB for MySQL
- Configuring Automatic Application Reconnection
- Impact of Modifying MySQL Source Instance Parameters
- Limits on Automatic Conversion from MyISAM to InnoDB
- Creating VPCs for TencentDB for MySQL
- Enhancing Business Load Capacity with TencentDB for MySQL
- Setting up 2-Region-3-DC Disaster Recovery Architecture
- Improving TencentDB for MySQL Performance with Read/Write Separation
- Migrating Data from InnoDB to RocksDB with DTS
- Building LAMP Stack for Web Application
- Building Drupal Website
- Building All-Scenario High-Availability Architecture
- Calling MySQL APIs in Python
- White Paper
- Troubleshooting
- API Documentation
- History
- Introduction
- API Category
- Making API Requests
- Instance APIs
- StopCpuExpand
- StartCpuExpand
- DescribeCpuExpandStrategy
- AddTimeWindow
- BalanceRoGroupLoad
- CloseWanService
- CreateDBInstance
- CreateDBInstanceHour
- CreateRoInstanceIp
- DeleteTimeWindow
- DescribeCdbZoneConfig
- DescribeDBFeatures
- DescribeDBInstanceCharset
- DescribeDBInstanceConfig
- DescribeDBInstanceGTID
- DescribeDBInstanceInfo
- DescribeDBInstanceRebootTime
- DescribeDBSwitchRecords
- DescribeRoGroups
- DescribeRoMinScale
- DescribeTagsOfInstanceIds
- DescribeTimeWindow
- InitDBInstances
- IsolateDBInstance
- ModifyAutoRenewFlag
- ModifyDBInstanceName
- ModifyDBInstanceProject
- ModifyDBInstanceVipVport
- ModifyInstanceTag
- ModifyRoGroupInfo
- ModifyTimeWindow
- OfflineIsolatedInstances
- OpenDBInstanceEncryption
- OpenDBInstanceGTID
- OpenWanService
- ReleaseIsolatedDBInstances
- RenewDBInstance
- RestartDBInstances
- StartReplication
- StopReplication
- SwitchDBInstanceMasterSlave
- SwitchDrInstanceToMaster
- SwitchForUpgrade
- UpgradeDBInstance
- UpgradeDBInstanceEngineVersion
- DescribeDBInstances
- DescribeDBZoneConfig
- CreateDeployGroup
- DeleteDeployGroups
- DescribeDeployGroupList
- ModifyNameOrDescByDpId
- Data Import APIs
- Database Proxy APIs
- AdjustCdbProxy
- AdjustCdbProxyAddress
- CloseCdbProxyAddress
- CreateCdbProxy
- CreateCdbProxyAddress
- DescribeCdbProxyInfo
- DescribeProxySupportParam
- ModifyCdbProxyAddressDesc
- ModifyCdbProxyAddressVipAndVPort
- ModifyCdbProxyParam
- CloseCDBProxy
- DescribeProxyCustomConf
- ReloadBalanceProxyNode
- SwitchCDBProxy
- UpgradeCDBProxyVersion
- Database Audit APIs
- Security APIs
- Task APIs
- Account APIs
- Backup APIs
- DescribeBackupDecryptionKey
- CreateBackup
- DeleteBackup
- DescribeBackupDownloadRestriction
- DescribeBackupEncryptionStatus
- DescribeBackupOverview
- DescribeBackupSummaries
- DescribeBinlogBackupOverview
- DescribeDataBackupOverview
- DescribeLocalBinlogConfig
- DescribeRemoteBackupConfig
- DescribeSlowLogs
- ModifyBackupDownloadRestriction
- ModifyBackupEncryptionStatus
- ModifyLocalBinlogConfig
- ModifyRemoteBackupConfig
- DescribeBackups
- DescribeBackupConfig
- ModifyBackupConfig
- DescribeBinlogs
- Rollback APIs
- Parameter APIs
- Database APIs
- Monitoring APIs
- Log-related API
- Data Types
- Error Codes
- FAQs
- Service Agreement
- Reference
- Glossary
- Contact Us
- Preset Plugin List
- Release Notes and Announcements
- Release Notes
- Announcements
- Commercial Billing for Database Proxy
- TencentDB for MySQL Audit Upgrade
- Added Authentication APIs
- API Authentication Upgrade
- TencentDB for MySQL API 2.0 Discontinuation
- Monitoring Module Upgrade in Shanghai Region
- Monitoring Metric Optimization
- Network Architecture Upgrade
- Change of APIs for Querying the Specifications of Purchasable Database Instances
- Replacement of Certain Old Database Proxy APIs
- Added Advanced Monitoring Metrics
- Change of Calculation Formula for Memory Utilization
- Monitoring Module Upgrade and Optimization in Guangzhou and Shanghai Regions
- Monitoring Module Upgrade
- Parameter Template and Instance Purchase Process Optimization
- Binlog Will Take up Disk Space
- User Tutorial
- Product Introduction
- Tencent Kernel TXSQL
- Overview
- Kernel Version Release Notes
- Functionality Features
- Performance Features
- Security Features
- Stability Features
- TXRocks Engine
- Purchase Guide
- Getting Started
- Database Audit
- Operation Guide
- Use Limits
- Operation Overview
- Instance Management and Maintenance
- Instance Upgrade
- CPU Elastic Expansion
- Read-Only/Disaster Recovery Instances
- Database Proxy
- Account Management
- Database Management Center (DMC)
- Parameter Configuration
- Network and Security
- Backup and Rollback
- Data Migration
- Monitoring and Alarms
- Operation Logs
- Tag
- Best Practices
- Usage Specifications of TencentDB for MySQL
- Configuring Automatic Application Reconnection
- Impact of Modifying MySQL Source Instance Parameters
- Limits on Automatic Conversion from MyISAM to InnoDB
- Creating VPCs for TencentDB for MySQL
- Enhancing Business Load Capacity with TencentDB for MySQL
- Setting up 2-Region-3-DC Disaster Recovery Architecture
- Improving TencentDB for MySQL Performance with Read/Write Separation
- Migrating Data from InnoDB to RocksDB with DTS
- Building LAMP Stack for Web Application
- Building Drupal Website
- Building All-Scenario High-Availability Architecture
- Calling MySQL APIs in Python
- White Paper
- Troubleshooting
- API Documentation
- History
- Introduction
- API Category
- Making API Requests
- Instance APIs
- StopCpuExpand
- StartCpuExpand
- DescribeCpuExpandStrategy
- AddTimeWindow
- BalanceRoGroupLoad
- CloseWanService
- CreateDBInstance
- CreateDBInstanceHour
- CreateRoInstanceIp
- DeleteTimeWindow
- DescribeCdbZoneConfig
- DescribeDBFeatures
- DescribeDBInstanceCharset
- DescribeDBInstanceConfig
- DescribeDBInstanceGTID
- DescribeDBInstanceInfo
- DescribeDBInstanceRebootTime
- DescribeDBSwitchRecords
- DescribeRoGroups
- DescribeRoMinScale
- DescribeTagsOfInstanceIds
- DescribeTimeWindow
- InitDBInstances
- IsolateDBInstance
- ModifyAutoRenewFlag
- ModifyDBInstanceName
- ModifyDBInstanceProject
- ModifyDBInstanceVipVport
- ModifyInstanceTag
- ModifyRoGroupInfo
- ModifyTimeWindow
- OfflineIsolatedInstances
- OpenDBInstanceEncryption
- OpenDBInstanceGTID
- OpenWanService
- ReleaseIsolatedDBInstances
- RenewDBInstance
- RestartDBInstances
- StartReplication
- StopReplication
- SwitchDBInstanceMasterSlave
- SwitchDrInstanceToMaster
- SwitchForUpgrade
- UpgradeDBInstance
- UpgradeDBInstanceEngineVersion
- DescribeDBInstances
- DescribeDBZoneConfig
- CreateDeployGroup
- DeleteDeployGroups
- DescribeDeployGroupList
- ModifyNameOrDescByDpId
- Data Import APIs
- Database Proxy APIs
- AdjustCdbProxy
- AdjustCdbProxyAddress
- CloseCdbProxyAddress
- CreateCdbProxy
- CreateCdbProxyAddress
- DescribeCdbProxyInfo
- DescribeProxySupportParam
- ModifyCdbProxyAddressDesc
- ModifyCdbProxyAddressVipAndVPort
- ModifyCdbProxyParam
- CloseCDBProxy
- DescribeProxyCustomConf
- ReloadBalanceProxyNode
- SwitchCDBProxy
- UpgradeCDBProxyVersion
- Database Audit APIs
- Security APIs
- Task APIs
- Account APIs
- Backup APIs
- DescribeBackupDecryptionKey
- CreateBackup
- DeleteBackup
- DescribeBackupDownloadRestriction
- DescribeBackupEncryptionStatus
- DescribeBackupOverview
- DescribeBackupSummaries
- DescribeBinlogBackupOverview
- DescribeDataBackupOverview
- DescribeLocalBinlogConfig
- DescribeRemoteBackupConfig
- DescribeSlowLogs
- ModifyBackupDownloadRestriction
- ModifyBackupEncryptionStatus
- ModifyLocalBinlogConfig
- ModifyRemoteBackupConfig
- DescribeBackups
- DescribeBackupConfig
- ModifyBackupConfig
- DescribeBinlogs
- Rollback APIs
- Parameter APIs
- Database APIs
- Monitoring APIs
- Log-related API
- Data Types
- Error Codes
- FAQs
- Service Agreement
- Reference
- Glossary
- Contact Us
- Preset Plugin List
This document gives FAQs related to the CPU Elastic Scaling feature.
Why can't I find the CPU Elastic Scaling feature in the console?
The CPU Elastic Scaling feature is only available for MySQL Universal Edition with two or three-node instances, or single-node instances with local disks (read-only instance).You can check whether your instance is single-node (cloud disk) or dedicated version, as these types currently do not support the CPU Elastic Scaling feature.
During stress testing, why does the monitoring show that the CPU utilization remains at 100% even after the feature is enabled?
CPU utilization is calculated based on the actual number of CPU cores. If the service load fully utilizes all CPU performance, performance-related metrics such as TPS, QPS, and response time of the database system should be given attention.
Why does the CPU Elastic Scaling feature fail to be enabled?
There are two possible reasons for the failure to enable the CPU elastic scaling feature:
Your Tencent Cloud account does not have a sufficient balance.
The CPU resources on the host is insufficient (rarely occurs).
Why am I not notified of events when the CPU is scaled-out or scaled-in?
You can troubleshoot and handle the issue as follows.
Check whether the alarm for CPU elastic scaling events has been enabled. If not, enable it by referring to Enabling Event Alarms.
Check the notification recipient list; it is possible that no relevant users have been added. You can add the notification recipient by referring to Adding Message Recipients.
What should I do if a HA switch occurs after the CPU Elastic Scaling feature is enabled?
The CPU Elastic Scaling feature will take effect simultaneously on both the primary and secondary nodes on two-node and three-node instances. If a HA switch occurs on a two-node or three-node instance after the CPU Elastic Scaling feature takes effect, the switched node will also have the expanded CPU specification. When automatic scaling is disabled or manual scaling is stopped, it will automatically restore to the original CPU specification. Please note that for read-only instances and disaster recovery instances, the feature need to be enabled separately. That means when the CPU Elastic Scaling feature is enabled and takes effect on the primary instance, the read-only instances and disaster recovery instances attached to this primary instance will not expand their CPU specification simultaneously. You need to enable the CPU elastic Scaling feature for them separately.
How can I query the progress and details related to CPU elastic scaling tasks?
You can query the progress and details related to CPU elastic scaling tasks through the task list, with the following steps:
1. Log in to the TencentDB for MySQL console.
2. Choose Task List on the left sidebar, select the region, click Task Type, choose Configure Elastic Expansion Strategy, and then click OK.
3. In the filtered task list, locate the target task to inquire about its progress. Click Task Details in the operation column to view detailed task information.
Why am I continuously billed after the CPU Elastic Scaling feature is enabled?
If you choose manual scaling when enabling the feature, the scaling will continue until you manually stop it. Therefore, after enabling manual scaling, please be sure to manually stop it based on your business requirements.
It is recommended to choose automatic scaling. After the configuration, the CPU specifications will be automatically and elastically scaled based on the user-configured scale-out and scale-in thresholds. Also, you will only be billed for the number of cores scaled out when the scaling is successfully triggered. No fees are charged when there is no scaling.
Within one hour after automatic scaling is enabled, it automatically scales in only 6 minutes after scaling was triggered. Why am I being charged for 10 minutes?
To mitigate the impact of continuous intermittent peaks, there is a minimum protection period of 10 minutes during automatic scaling. This means, if the automatic scaling lasts more than 10 minutes, the costs are calculated based on the actual scaling duration. If the automatic scaling lasts for no more than 10 minutes, the costs are calculated based on a 10-minute duration.
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