This topic describes the specifications of standard dual-replica instances of Redis Open-Source Edition, including memory, maximum connections, bandwidth, and reference values for queries per second (QPS).
Instance specifications
Specification name | Specification code (for API use) | CPU cores | Memory (GB) | Bandwidth | Maximum connections | QPS reference value |
256 MB master-replica | redis.master.micro.default | 2 | 0.25 | 80 Mbps (10 MB/s) | 10,000 | 80,000 |
1 GB master-replica | redis.master.small.default | 2 | 1 | 80 Mbps (10 MB/s) | 10,000 | 80,000 |
2 GB master-replica | redis.master.mid.default | 2 | 2 | 128 Mbps (16 MB/s) | 10,000 | 80,000 |
4 GB master-replica | redis.master.stand.default | 2 | 4 | 192 Mbps (24 MB/s) | 20,000 | 80,000 |
8 GB master-replica | redis.master.large.default | 2 | 8 | 192 Mbps (24 MB/s) | 20,000 | 80,000 |
16 GB master-replica | redis.master.2xlarge.default | 2 | 16 | 256 Mbps (32 MB/s) | 20,000 | 80,000 |
32 GB master-replica | redis.master.4xlarge.default | 2 | 32 | 256 Mbps (32 MB/s) | 30,000 | 80,000 |
64 GB master-replica | redis.master.8xlarge.default | 2 | 64 | 384 Mbps (48 MB/s) | 30,000 | 80,000 |
The maximum connections listed in the table apply only to instances that are compatible with Redis 5.0 or later. For instances compatible with Redis 4.0, the maximum number of connections is 10,000.
CPU cores
To ensure service stability, the system reserves one CPU core to process background tasks . For a cluster or read/write splitting architecture, the system reserves one CPU core for each data shard or read-only node to process background tasks.
Bandwidth calculation rules
The bandwidth value in the table represents the total bandwidth for an instance, which is the sum of the bandwidth of all its shards or nodes.
The bandwidth applies to both upstream and downstream traffic. For example, if an instance type has a bandwidth of 80 Mbps (10 MB/s), its upstream and downstream bandwidths are both 80 Mbps (10 MB/s).
NoteIf your instance has burst or planned traffic peaks, you can adjust the instance bandwidth as needed. For more information, see Manually increase the bandwidth of an instance.
The bandwidth limit for Tair and Redis Open-Source Edition specifies the bandwidth of the shard nodes and is independent of the network connection type.
For more information about bandwidth, see the Bandwidth FAQ.
FAQ
Why is the actual bandwidth of my instance different from the bandwidth in this document?
The bandwidth for some instance types may change after a product upgrade. If your instance's bandwidth is different from the one in this document, you can update it by changing the instance configuration. You can select your current instance type as the target to update the bandwidth at no extra cost.
How do I create a 256 MB instance?
On the instance creation page, you can select the subscription billing method to find this instance type.