- Release Notes and Announcements
- Release Notes
- Open-Source Plugin Privilege Escalation Has Vulnerability Risk for PostgreSQL
- Announcements
- Security Risk Statement for Creating Partial Plugins in PostgreSQL Cloud Database
- TencentDB for PostgreSQL Will Start Billing for Backup Space
- Some Extensions on Lower Kernel Version Can't Be Created and Upgraded in TencentDB for PostgreSQL
- Announcement on the Risk of Privilege Escalation Vulnerability in Cloud Database PostgreSQL Open Source Plugin
- Product Introduction
- Purchase Guide
- Getting Started
- Kernel Version Introduction
- Operation Guide
- Instance Management
- Instance Lifecycle
- Setting Instance Maintenance Time
- Modifying Instance Configuration
- Setting instance availability zone for disaster recovery or region disaster recovery
- Modifying AZs
- Terminating Instances
- Restoring Instances
- Eliminating Instances
- Restarting Instances
- Modifying Data Replication Mode
- Switch Source-Replica Instance
- Upgrading Instance
- Read-Only Instance
- Account Management
- Database Management
- Database Optimization
- Parameter Management
- Log management
- Backup and Restoration
- Backup Principles and Solutions
- Backing up Data
- Downloading Backup
- Cloning Instance
- Automatic Backup Settings
- Restoring PostgreSQL Data on CVMs
- Deleting Backup
- Viewing Backup Space
- Setting Backup Download Rules
- Use Serverless Cloud Function to Transfer Historical Backups of PostgreSQL
- Rollback to the Original Instance
- Data Migration
- Database Audit
- Extension Management
- Network Management
- Access Management
- Data Encryption
- Tenant and Resource Isolation
- Security Groups
- Monitoring and Alarms
- Tag
- Instance Management
- PostgreSQL for Serverless
- MSSQL Compatible Version
- Practical Tutorial
- postgres_fdw Extension for Cross-database Access
- Automatically Creating Partition in PostgreSQL
- Searching in High Numbers of Tags Based on pg_roaringbitmap
- Querying People Nearby with One SQL Statement
- Configuring TencentDB for PostgreSQL as GitLab's External Data Source
- Supporting Tiered Storage Based on cos_fdw Extension
- Implement Read/Write Separation via pgpool
- Analyzing Slow SQL Using the auto_explain Plugin
- Using pglogical for Logical Replication
- Performance White Paper
- API Documentation
- History
- Introduction
- API Category
- Making API Requests
- Instance APIs
- CreateInstances
- DescribeDBInstances
- DescribeDBInstanceAttribute
- DescribeEncryptionKeys
- DescribeDBInstanceHAConfig
- SwitchDBInstancePrimary
- ModifyDBInstanceName
- ModifyDBInstanceSpec
- ModifyDBInstanceDeployment
- UpgradeDBInstanceKernelVersion
- ModifyDBInstanceHAConfig
- ModifyDBInstanceChargeType
- ModifyDBInstancesProject
- ModifySwitchTimePeriod
- RenewInstance
- SetAutoRenewFlag
- RestartDBInstance
- IsolateDBInstances
- DisIsolateDBInstances
- DestroyDBInstance
- CreateDBInstances
- InitDBInstances
- UpgradeDBInstance
- UpgradeDBInstanceMajorVersion
- Read-only Replica APIs
- Backup and Recovery APIs
- DescribeAvailableRecoveryTime
- DescribeCloneDBInstanceSpec
- CloneDBInstance
- RestoreDBInstanceObjects
- DescribeBackupOverview
- DescribeBackupSummaries
- DescribeBackupPlans
- ModifyBackupPlan
- CreateBaseBackup
- DescribeBaseBackups
- ModifyBaseBackupExpireTime
- DeleteBaseBackup
- DescribeLogBackups
- DeleteLogBackup
- DescribeBackupDownloadURL
- DescribeBackupDownloadRestriction
- ModifyBackupDownloadRestriction
- DescribeDBXlogs
- DescribeDBBackups
- Parameter Management APIs
- Security Group APIs
- Performance Optimization APIs
- Account APIs
- Specification APIs
- PostgreSQL for Serverless APIs
- Network APIs
- Data Types
- Error Codes
- FAQs
- Service Agreement
- Glossary
- Contact Us
- Release Notes and Announcements
- Release Notes
- Open-Source Plugin Privilege Escalation Has Vulnerability Risk for PostgreSQL
- Announcements
- Security Risk Statement for Creating Partial Plugins in PostgreSQL Cloud Database
- TencentDB for PostgreSQL Will Start Billing for Backup Space
- Some Extensions on Lower Kernel Version Can't Be Created and Upgraded in TencentDB for PostgreSQL
- Announcement on the Risk of Privilege Escalation Vulnerability in Cloud Database PostgreSQL Open Source Plugin
- Product Introduction
- Purchase Guide
- Getting Started
- Kernel Version Introduction
- Operation Guide
- Instance Management
- Instance Lifecycle
- Setting Instance Maintenance Time
- Modifying Instance Configuration
- Setting instance availability zone for disaster recovery or region disaster recovery
- Modifying AZs
- Terminating Instances
- Restoring Instances
- Eliminating Instances
- Restarting Instances
- Modifying Data Replication Mode
- Switch Source-Replica Instance
- Upgrading Instance
- Read-Only Instance
- Account Management
- Database Management
- Database Optimization
- Parameter Management
- Log management
- Backup and Restoration
- Backup Principles and Solutions
- Backing up Data
- Downloading Backup
- Cloning Instance
- Automatic Backup Settings
- Restoring PostgreSQL Data on CVMs
- Deleting Backup
- Viewing Backup Space
- Setting Backup Download Rules
- Use Serverless Cloud Function to Transfer Historical Backups of PostgreSQL
- Rollback to the Original Instance
- Data Migration
- Database Audit
- Extension Management
- Network Management
- Access Management
- Data Encryption
- Tenant and Resource Isolation
- Security Groups
- Monitoring and Alarms
- Tag
- Instance Management
- PostgreSQL for Serverless
- MSSQL Compatible Version
- Practical Tutorial
- postgres_fdw Extension for Cross-database Access
- Automatically Creating Partition in PostgreSQL
- Searching in High Numbers of Tags Based on pg_roaringbitmap
- Querying People Nearby with One SQL Statement
- Configuring TencentDB for PostgreSQL as GitLab's External Data Source
- Supporting Tiered Storage Based on cos_fdw Extension
- Implement Read/Write Separation via pgpool
- Analyzing Slow SQL Using the auto_explain Plugin
- Using pglogical for Logical Replication
- Performance White Paper
- API Documentation
- History
- Introduction
- API Category
- Making API Requests
- Instance APIs
- CreateInstances
- DescribeDBInstances
- DescribeDBInstanceAttribute
- DescribeEncryptionKeys
- DescribeDBInstanceHAConfig
- SwitchDBInstancePrimary
- ModifyDBInstanceName
- ModifyDBInstanceSpec
- ModifyDBInstanceDeployment
- UpgradeDBInstanceKernelVersion
- ModifyDBInstanceHAConfig
- ModifyDBInstanceChargeType
- ModifyDBInstancesProject
- ModifySwitchTimePeriod
- RenewInstance
- SetAutoRenewFlag
- RestartDBInstance
- IsolateDBInstances
- DisIsolateDBInstances
- DestroyDBInstance
- CreateDBInstances
- InitDBInstances
- UpgradeDBInstance
- UpgradeDBInstanceMajorVersion
- Read-only Replica APIs
- Backup and Recovery APIs
- DescribeAvailableRecoveryTime
- DescribeCloneDBInstanceSpec
- CloneDBInstance
- RestoreDBInstanceObjects
- DescribeBackupOverview
- DescribeBackupSummaries
- DescribeBackupPlans
- ModifyBackupPlan
- CreateBaseBackup
- DescribeBaseBackups
- ModifyBaseBackupExpireTime
- DeleteBaseBackup
- DescribeLogBackups
- DeleteLogBackup
- DescribeBackupDownloadURL
- DescribeBackupDownloadRestriction
- ModifyBackupDownloadRestriction
- DescribeDBXlogs
- DescribeDBBackups
- Parameter Management APIs
- Security Group APIs
- Performance Optimization APIs
- Account APIs
- Specification APIs
- PostgreSQL for Serverless APIs
- Network APIs
- Data Types
- Error Codes
- FAQs
- Service Agreement
- Glossary
- Contact Us
A database instance is a standalone database environment that runs in the Tencent Cloud. It can contain multiple databases created by users and can be accessed by using the same tools and applications as those for a standalone database instance.
Instance Types
TencentDB for PostgreSQL supports the following types of instances:
Instance Type | Description | Architecture | Visible in the Instance List | Capability |
Primary instance | An instance that can be read from and written to | High-availability edition | Yes | The primary instance can associate with read-only instances to realize read/write separation. |
Read-only instance | An instance that can only be read from | Single-node read-only | Yes | A read-only instance cannot exist on its own. It must instead be associated with a source instance, with its data only being synced from the source instance. It must also reside in the same region as the source instance. By default, up to six read-only instances can be created for a primary instance. |
Reference documents
For more information on the creation of the read-only instance and relevant notes, see Read-Only Instance Overview.
For more information on how to create and configure an RO group, see Managing RO Groups.
Note:
When the used capacity of the instance exceeds the purchased capacity, the database instance will be locked and become read-only. You can set alarms for capacity usage.
Supported Instance Specifications
Edition | Version | Specification Type | CPU and Memory | Disk Capacity | Maximum Number of Connections |
Dual-machine high availability (one primary and one secondary), read-only instance | 10,11,12,13,14,15,16 | General - local high-performance SSD | 1core 2GiB | 10GB - 3000GB | 2048 |
| | | 2core 4GiB | 10GB - 3000GB | 2048 |
| | | 2core 6GiB | 10GB - 3000GB | 2048 |
| | | 4core 8GiB | 10GB - 3000GB | 2048 |
| | | 4core 16GiB | 10GB - 4000GB | 2048 |
| | | 6core 24GiB | 10GB - 4000GB | 2048 |
| | | 8core 16GiB | 10GB - 4000GB | 2048 |
| | | 8core 32GiB | 10GB - 4000GB | 4000 |
| | | 8core 48GiB | 10GB - 4000GB | 4500 |
| | | 8core 64GiB | 10GB - 4500GB | 5500 |
| | | 12core 24GiB | 10GB - 8000GB | 2048 |
| | | 12core 64GiB | 10GB - 8000GB | 5500 |
| | | 16core 32GiB | 10GB - 8000GB | 4000 |
| | | 16core 96GiB | 10GB - 8000GB | 8000 |
| | | 20core 128GiB | 10GB - 8000GB | 10000 |
| | | 24core 48GiB | 10GB - 8000GB | 4500 |
| | | 24core 192GiB | 10GB - 8000GB | 12000 |
| | | 28core 240GiB | 10GB - 8000GB | 13000 |
| | | 32core 64GiB | 10GB - 8000GB | 5500 |
| | | 48core 480GiB | 10GB - 8000GB | 22000 |
Note:
The Shanghai Zone 5, Guangzhou Zone 4, and Guangzhou Zone 6 support larger storage specifications:
20-core 128 GiB, with disk capacity up to 7000 GB.
28-core 240 GiB, with disk capacity up to 8000 GB.
48-core 480 GiB, with disk capacity up to 16000 GB.
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