Redis Pub/Sub: PUBSUB

Redis PUBSUB Command

Redis PUBSUB command is an introspection command that allows to inspecting the state of the Pub/Sub subsystem. It is composed of subcommands that are documented separately.

Here are some common uses and scenarios for the "PUBSUB" command:

• Channel Inspection: Provides information about active channels, including the number of subscribers, helping monitor channel activity.
• Subscription Management: Lists patterns and channels that clients are currently subscribed to, aiding in managing and debugging subscriptions.
• Client Insights: Retrieves information about clients connected to the Redis server and their subscriptions, useful for diagnostics and optimization.
• Traffic Analysis: Helps analyze messaging traffic and understand the distribution of messages across channels and patterns.

Syntax:

PUBSUB subcommand [argument [argument ...]]

Following listing shows some supported patterens in redis

• h?llo subscribes to hello, hallo and hxllo
• h*llo subscribes to hllo and heeeello
• h[ae]llo subscribes to hello and hallo, but not hillo

Available since

2.8.0.

Return Value

Array reply, a list of active channels.

Return Value Type

Array

Example: Redis PUBSUB

redis 127.0.0.1:6379> PUBSUB CHANNELS
(empty list or set)