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document-database-service/umn/source/introduction/dds_db_instance/db_instance_specifications.rst
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DB Instance Specifications

DB instance specifications are listed in the following table.

Note

The DB instance specifications depend on service requirements.

You can change the maximum number of connections of a DB instance by modifying the net.maxIncomingConnections parameter. For details about how to change the parameter value, see Modifying a Parameter Template <en-us_topic_configuration>.

Cluster

For details about the cluster instance specifications, see Table 1 <dds_01_0024__table93922044142815> and Table 2 <dds_01_0024__table3885614174718>.

Table 1 config specifications
CPU Type vCPUs Memory (GB) Default Maximum Number of Connections

x86 Kunpeng

2

4

600
Table 2 shard and mongos specifications
vCPUs Memory (GB) Default Maximum Number of Connections
1 4 400
2 8 400
4 16 1000
8 32 4000
16 64 8000

Replica Set

The specifications supported by a replica set are the same as those supported by shard and mongos. For details, see Table 2 <dds_01_0024__table3885614174718>.

Single Node

The specifications supported by a single node are the same as those supported by shard and mongos. For details, see Table 2 <dds_01_0024__table3885614174718>.