Redis Client Connection

Redis accepts connections from clients by listening on a TCP port or a Unix socket. When a connection is established, Redis internally performs the following operations:

• First, the client socket is set to non-blocking mode, because Redis uses a non-blocking multiplexing model for network event handling.
• Then, the TCP_NODELAY attribute is set for this socket to disable the Nagle algorithm.
• Then a readable file event is created to monitor data transmission on this client socket.

Maximum Connections

In Redis 2.4, the maximum number of connections was hardcoded directly in the code, while in version 2.6 this value became configurable.

The default value of maxclients is 10000, and you can also modify this value in redis.conf.

config get maxclients

1) "maxclients"
2) "10000"

Example

In the following example, we set the maximum number of connections to 100000 when the server starts:

redis-server --maxclients 100000

Client Commands