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Last updated: 2026-03-17 16:36:35

Specifications
Note：
As a trial version, the 256 MB specification on v4.0 or v5.0 is only suitable for product verification in testing environments. We don't recommend that you use it in production environments. It is available only in the following AZs:
Guangzhou (Zones 6 and 7), Shanghai (Zones 2, 3, 4 and 5), Beijing (Zones 1, 2, 3, 4, 5, 6, and 7), and Shenzhen Finance (Zones 1, 2, and 3). Other 1 GB and above specifications can be smoothly downgraded to the 256 MB specification.
Feature
Standard Architecture
Cluster Architecture
Memory specifications
256MB - 64GB
Single shard: 1 GB to 64 GB 
Number of replicas
1 - 5
1 - 5
Number of shards
N/A
1, 3, 5, 8, 12, 16, 24, 32, 40, 48, 64, 80, 96, 128, and 256
QPS
80,000–100,000
80000 to 100000 per shard
Maximum number of connections
10000 by default, adjustable up to 40000
10000 per shard by default, adjustable up to 40000
Traffic limit
528MB/s - 608MB/s
288MB/s - 72GB/s
Multiple databases
Supported
Supported
Mget and Mset
Supported
Supported
lua
Supported
Supported (cross-slot access not supported)
Horizontal scale-out
Not supported
Supported
Replica scale-out
Supported 
Supported
Read-write separation
Supported
Supported
Support for GEO
Supported
Supported
Description of the CPU core quantity
To ensure the stable operations of the system, each node is assigned with 2-core CPU, one of which is used to process the backend tasks.
Number of Connections and Traffic
Distributed Cache offers tiered options with customizable core performance metrics including storage capacity, connections, QPS, and bandwidth.
Content Capacity (GB)
Maximum number of connections
Maximum throughput (MB/s)
0.25
3,000
10
1
40,000
16
2
40,000
24
4
40,000
24
8
40,000
24
12
40,000
32
16
40,000
32
20
40,000
48
24
40,000
48
32
40,000
48
40
40,000
64
48
40,000
64
64
40,000
64
The number of connections in the Cluster Edition = Shard connections * Number of shards.
For the throughput of the Cluster Edition, see Bandwidth Adjustment.
Note：
After scaling, legacy instances capable of up to 9,000 connections will be capable of 10,000 connections.
Performance Data
Performance references
As the execution time of commands varies, and database operation commands differ across business scenarios in production environments, the corresponding performance will also vary. The test data provided in this document is a reference value obtained under specified parameters and shall only serve as a reference. Actual performance needs to be verified through tests based on actual business scenarios.
Single-node test performance
Instance Specifications
Connections
QPS
standard architecture 8GB
10,000
80,000–100,000
cluster architecture 8GB (single shard)
10,000
80,000–100,000
Cluster architecture test performance
Memory Edition (Cluster Architecture) performance = Memory Edition (Standard Architecture) performance * number of shards
Test method
Test environment
Test Client CVM Instances
CVM Cores
CVM Memory
Region
Instance Size
3
2
8 GB
Guangzhou Zone 2
Memory Edition (Standard Architecture) 8 GB
Test parameters
redis-benchmark -h 10.66.187.x -p 6379 -a crs-1znib6aw:chen2016 -t set -c 3500 -d 128 -n 25000000 -r 5000000
redis-benchmark -h 10.66.187.x -p 6379 -a crs-1z5536aw:chen2016 -t set -c 3500 -d 128 -n 25000000 -r 5000000
redis-benchmark -h 10.66.187.x -p 6379 -a crs-090rjlih:1234567 -t set -c 3500 -d 128 -n 25000000 -r 5000000
QPS calculation
Sum of the QPS values of three pressure test clients (tested by redis-benchmark).

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Tencent Cloud Distributed Cache (Redis OSS-Compatible)

Specifications and Performance

Specifications

Description of the CPU core quantity

Number of Connections and Traffic

Performance Data

Performance references

Single-node test performance

Cluster architecture test performance

Test method

Test environment

Test parameters

QPS calculation

Help and Support

Feature	Standard Architecture	Cluster Architecture
Memory specifications	256MB - 64GB	Single shard: 1 GB to 64 GB
Number of replicas	1 - 5	1 - 5
Number of shards	N/A	1, 3, 5, 8, 12, 16, 24, 32, 40, 48, 64, 80, 96, 128, and 256
QPS	80,000–100,000	80000 to 100000 per shard
Maximum number of connections	10000 by default, adjustable up to 40000	10000 per shard by default, adjustable up to 40000
Traffic limit	528MB/s - 608MB/s	288MB/s - 72GB/s
Multiple databases	Supported	Supported
Mget and Mset	Supported	Supported
lua	Supported	Supported (cross-slot access not supported)
Horizontal scale-out	Not supported	Supported
Replica scale-out	Supported	Supported
Read-write separation	Supported	Supported
Support for GEO	Supported	Supported

Content Capacity (GB)	Maximum number of connections	Maximum throughput (MB/s)
0.25	3,000	10
1	40,000	16
2	40,000	24
4	40,000	24
8	40,000	24
12	40,000	32
16	40,000	32
20	40,000	48
24	40,000	48
32	40,000	48
40	40,000	64
48	40,000	64
64	40,000	64

Instance Specifications	Connections	QPS
standard architecture 8GB	10,000	80,000–100,000
cluster architecture 8GB (single shard)	10,000	80,000–100,000

Test Client CVM Instances	CVM Cores	CVM Memory	Region	Instance Size
3	2	8 GB	Guangzhou Zone 2	Memory Edition (Standard Architecture) 8 GB