Instance Type and Specification

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最終更新日: 2026-09-20 14:30:15

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A database instance is a database environment that runs independently in Tencent Cloud. A database instance can contain multiple databases created by users and can be accessed using the same tools and applications as a standalone database instance.
Instance Types
TencentDB for PostgreSQL provides the following two types of database instances:
Instance Type
Definition
Architecture
Disk Type
Visible in Instance List or Not
Function
Primary Instance
Instance that can read and write
High-Availability Edition
Local SSD disk
Cloud disk
Yes
Has the full features of TencentDB for PostgreSQL. Primary instances with local SSD storage can attach read-only instances, while primary instances with cloud disks do not currently support attaching read-only instances.
Read-only instances
Instance that provides read-only functionality
Single-node read-only
Local SSD
Yes
Read-only instances cannot exist independently and must belong to a primary instance (with local SSD storage). Their only data source is data synchronized from the primary instance. They can only be in the same region as the primary instance. By default, a single primary instance can create up to 6 read-only instances.
Related Information
For the creation operations and considerations of read-only instances, see Create Read-Only Instance.
For creating and configuring a read-only instance RO group, see Manage Read-Only Instance RO Group.
Note:
When the actual used capacity of an instance exceeds its purchased capacity, the instance is automatically locked. After being locked, the instance supports only read operations and cannot accept write operations. Please configure capacity alarms.
Supported Specifications for Instances with Local SSD Disks
Edition
Version
Specification Type
CPU and Memory
Disk Capacity
Maximum Number of Connections
Maximum IOPS
Dual-machine high availability (one primary and one secondary) instance, read-only instance
11,12,13,14,15,16,17,18
General - local high-performance SSD
1core 2GiB
10GB - 3000GB
2048
1200
﻿
﻿
﻿
2core 4GiB
10GB - 3000GB
2048
4000
﻿
﻿
﻿
2core 6GiB
10GB - 3000GB
2048
6000
﻿
﻿
﻿
4core 8GiB
10GB - 3000GB
2048
8000
﻿
﻿
﻿
4core 16GiB
10GB - 4000GB
2048
14000
﻿
﻿
﻿
6core 24GiB
10GB - 4000GB
2048
16000
﻿
﻿
﻿
8core 16GiB
10GB - 4000GB
2048
20000
﻿
﻿
﻿
8core 32GiB
10GB - 4000GB
4000
28000
﻿
﻿
﻿
8core 48GiB
10GB - 4000GB
4500
30000
﻿
﻿
﻿
8core 64GiB
10GB - 4500GB
5500
36000
﻿
﻿
﻿
12core 24GiB
10GB - 8000GB
2048
36000
﻿
﻿
﻿
12core 64GiB
10GB - 8000GB
5500
38000
﻿
﻿
﻿
16core 32GiB
10GB - 8000GB
4000
32000
﻿
﻿
﻿
16core 96GiB
10GB - 8000GB
8000
40000
﻿
﻿
﻿
20core 128GiB
10GB - 8000GB
10000
40000
﻿
﻿
﻿
24core 48GiB
10GB - 8000GB
4500
32000
﻿
﻿
﻿
24core 192GiB
10GB - 8000GB
12000
60000
﻿
﻿
﻿
28core 240GiB
10GB - 8000GB
13000
60000
﻿
﻿
﻿
32core 64GiB
10GB - 8000GB
5500
60000
﻿
﻿
﻿
32core 128GiB
10GB - 8000GB
10000
72000
﻿
﻿
﻿
48core 480GiB
10GB - 8000GB
22000
120000
﻿
﻿
﻿
64core 256GiB
10GB - 8000GB
13000
120000
﻿
﻿
﻿
64core 384GiB
10GB - 8000GB
20000
150000
﻿
﻿
﻿
64core 512GiB
10GB - 8000GB
22000
150000
﻿
﻿
﻿
90core 720GiB
10GB - 8000GB
36000
150000
﻿
﻿
﻿
128core 720GiB
10GB - 8000GB
36000
150000
﻿
﻿
﻿
156core 960GiB
10GB - 8000GB
40000
150000
Note:
Shanghai Zone 2, Shanghai Zone 3, Shanghai Zone 4, Shanghai Zone 5, Shanghai Zone 6, Shanghai Zone 7, Shanghai Zone 8, Guangzhou Zone 4, Guangzhou Zone 6, and Guangzhou Zone 7 support larger storage specifications: the 48-core 480GiB configuration supports a maximum disk capacity of 16,000 GB.
Supported Specifications for Instances with Cloud Disks
Note:
The CBS resources supported in different regions (Premium Disk, Cloud SSD, and Enhanced SSD) may vary. For the specific supported resources, refer to the configuration on the actual purchase page.
Edition
Database Major Version
Specification Type
CPU and Memory
Disk Capacity
Maximum Number of Connections
Dual-server high availability (one primary and one standby) instance
13,14,15,16,17,18
General-purpose - Premium Disk
General-purpose - Cloud SSD
General-purpose - Enhanced SSD
1core 2GiB
20GB - 32000GB
2048
﻿
﻿
﻿
2core 4GiB
20GB - 32000GB
2048
﻿
﻿
﻿
2core 6GiB
20GB - 32000GB
2048
﻿
﻿
﻿
4core 8GiB
20GB - 32000GB
2048
﻿
﻿
﻿
4core 16GiB
20GB - 32000GB
2048
﻿
﻿
﻿
6core 24GiB
20GB - 32000GB
2048
﻿
﻿
﻿
8core 16GiB
20GB - 32000GB
2048
﻿
﻿
﻿
8core 32GiB
20GB - 32000GB
4000
﻿
﻿
﻿
8core 48GiB
20GB - 32000GB
4500
﻿
﻿
﻿
8core 64GiB
20GB - 32000GB
5500
﻿
﻿
﻿
12core 24GiB
20GB - 32000GB
2048
﻿
﻿
﻿
12core 64GiB
20GB - 32000GB
5500
﻿
﻿
﻿
16core 32GiB
20GB - 32000GB
4000
﻿
﻿
﻿
16core 96GiB
20GB - 32000GB
8000
﻿
﻿
﻿
20core 128GiB
20GB - 32000GB
10000
﻿
﻿
﻿
24core 48GiB
20GB - 32000GB
4500
﻿
﻿
﻿
24core 192GiB
20GB - 32000GB
12000
﻿
﻿
﻿
28core 240GiB
20GB - 32000GB
13000
﻿
﻿
﻿
32core 64GiB
20GB - 32000GB
5500

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フィードバック

Instance Type	Definition	Architecture	Disk Type	Visible in Instance List or Not	Function
Primary Instance	Instance that can read and write	High-Availability Edition	Local SSD disk Cloud disk	Yes	Has the full features of TencentDB for PostgreSQL. Primary instances with local SSD storage can attach read-only instances, while primary instances with cloud disks do not currently support attaching read-only instances.
Read-only instances	Instance that provides read-only functionality	Single-node read-only	Local SSD	Yes	Read-only instances cannot exist independently and must belong to a primary instance (with local SSD storage). Their only data source is data synchronized from the primary instance. They can only be in the same region as the primary instance. By default, a single primary instance can create up to 6 read-only instances.

Edition	Version	Specification Type	CPU and Memory	Disk Capacity	Maximum Number of Connections	Maximum IOPS
Dual-machine high availability (one primary and one secondary) instance, read-only instance	11,12,13,14,15,16,17,18	General - local high-performance SSD	1core 2GiB	10GB - 3000GB	2048	1200
						2core 4GiB	10GB - 3000GB	2048	4000
						2core 6GiB	10GB - 3000GB	2048	6000
						4core 8GiB	10GB - 3000GB	2048	8000
						4core 16GiB	10GB - 4000GB	2048	14000
						6core 24GiB	10GB - 4000GB	2048	16000
						8core 16GiB	10GB - 4000GB	2048	20000
						8core 32GiB	10GB - 4000GB	4000	28000
						8core 48GiB	10GB - 4000GB	4500	30000
						8core 64GiB	10GB - 4500GB	5500	36000
						12core 24GiB	10GB - 8000GB	2048	36000
						12core 64GiB	10GB - 8000GB	5500	38000
						16core 32GiB	10GB - 8000GB	4000	32000
						16core 96GiB	10GB - 8000GB	8000	40000
						20core 128GiB	10GB - 8000GB	10000	40000
						24core 48GiB	10GB - 8000GB	4500	32000
						24core 192GiB	10GB - 8000GB	12000	60000
						28core 240GiB	10GB - 8000GB	13000	60000
						32core 64GiB	10GB - 8000GB	5500	60000
						32core 128GiB	10GB - 8000GB	10000	72000
						48core 480GiB	10GB - 8000GB	22000	120000
						64core 256GiB	10GB - 8000GB	13000	120000
						64core 384GiB	10GB - 8000GB	20000	150000
						64core 512GiB	10GB - 8000GB	22000	150000
						90core 720GiB	10GB - 8000GB	36000	150000
						128core 720GiB	10GB - 8000GB	36000	150000
						156core 960GiB	10GB - 8000GB	40000	150000

Edition	Database Major Version	Specification Type	CPU and Memory	Disk Capacity	Maximum Number of Connections
Dual-server high availability (one primary and one standby) instance	13,14,15,16,17,18	General-purpose - Premium Disk General-purpose - Cloud SSD General-purpose - Enhanced SSD	1core 2GiB	20GB - 32000GB	2048
						2core 4GiB	20GB - 32000GB	2048
						2core 6GiB	20GB - 32000GB	2048
						4core 8GiB	20GB - 32000GB	2048
						4core 16GiB	20GB - 32000GB	2048
						6core 24GiB	20GB - 32000GB	2048
						8core 16GiB	20GB - 32000GB	2048
						8core 32GiB	20GB - 32000GB	4000
						8core 48GiB	20GB - 32000GB	4500
						8core 64GiB	20GB - 32000GB	5500
						12core 24GiB	20GB - 32000GB	2048
						12core 64GiB	20GB - 32000GB	5500
						16core 32GiB	20GB - 32000GB	4000
						16core 96GiB	20GB - 32000GB	8000
						20core 128GiB	20GB - 32000GB	10000
						24core 48GiB	20GB - 32000GB	4500
						24core 192GiB	20GB - 32000GB	12000
						28core 240GiB	20GB - 32000GB	13000
						32core 64GiB	20GB - 32000GB	5500

tencent cloud

TencentDB for PostgreSQL

Instance Type and Specification

Instance Types

Related Information

Supported Specifications for Instances with Local SSD Disks

Supported Specifications for Instances with Cloud Disks

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