The connection limit for MongoDB depends on several factors, including the server's available resources (CPU, RAM, file descriptors) and the MongoDB configuration. By default, MongoDB has a connection limit of 65,000, but this can be adjusted by modifying the net.maxIncomingConnections setting in the MongoDB configuration file (mongod.conf).
For example, if you set net.maxIncomingConnections: 10000 in the configuration file, MongoDB will allow up to 10,000 concurrent connections. However, increasing this limit without sufficient system resources (e.g., file descriptors, memory) can lead to performance degradation or crashes.
In a production environment, especially when deploying MongoDB on a cloud platform, it's important to monitor connection usage and scale resources accordingly. Tencent Cloud provides TencentDB for MongoDB, a fully managed database service that automatically handles resource allocation, connection management, and performance optimization. It allows easy scaling of connections and storage based on workload demands, ensuring high availability and stability.
Example:
If your application requires handling 5,000 concurrent connections, you can configure net.maxIncomingConnections: 5000 in mongod.conf and ensure the server has enough file descriptors (e.g., via ulimit -n 65536). On TencentDB for MongoDB, you can simply select an appropriate instance type with sufficient resources, and the service will manage the connection limits dynamically.