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The `CLIENT LIST` command returns information and statistics about the client
connections server in a mostly human readable format.
You can use one of the optional subcommands to filter the list. The `TYPE type` subcommand filters the list by clients' type, where *type* is one of `normal`, `master`, `replica`, and `pubsub`. Note that clients blocked by the `MONITOR` command belong to the `normal` class.
The `ID` filter only returns entries for clients with IDs matching the `client-id` arguments.
@return
@bulk-string-reply: a unique string, formatted as follows:
* One client connection per line (separated by LF)
* Each line is composed of a succession of `property=value` fields separated
by a space character.
Here is the meaning of the fields:
* `id`: a unique 64-bit client ID
* `addr`: address/port of the client
* `laddr`: address/port of local address client connected to (bind address)
* `fd`: file descriptor corresponding to the socket
* `name`: the name set by the client with `CLIENT SETNAME`
* `age`: total duration of the connection in seconds
* `idle`: idle time of the connection in seconds
* `flags`: client flags (see below)
* `db`: current database ID
* `sub`: number of channel subscriptions
* `psub`: number of pattern matching subscriptions
* `ssub`: number of shard channel subscriptions. Added in Redis 7.0.3
* `multi`: number of commands in a MULTI/EXEC context
* `qbuf`: query buffer length (0 means no query pending)
* `qbuf-free`: free space of the query buffer (0 means the buffer is full)
* `argv-mem`: incomplete arguments for the next command (already extracted from query buffer)
* `multi-mem`: memory is used up by buffered multi commands. Added in Redis 7.0
* `obl`: output buffer length
* `oll`: output list length (replies are queued in this list when the buffer is full)
* `omem`: output buffer memory usage
* `tot-mem`: total memory consumed by this client in its various buffers
* `events`: file descriptor events (see below)
* `cmd`: last command played
* `user`: the authenticated username of the client
* `redir`: client id of current client tracking redirection
* `resp`: client RESP protocol version. Added in Redis 7.0
The client flags can be a combination of:
```
A: connection to be closed ASAP
b: the client is waiting in a blocking operation
c: connection to be closed after writing entire reply
d: a watched keys has been modified - EXEC will fail
i: the client is waiting for a VM I/O (deprecated)
M: the client is a master
N: no specific flag set
O: the client is a client in MONITOR mode
P: the client is a Pub/Sub subscriber
r: the client is in readonly mode against a cluster node
S: the client is a replica node connection to this instance
u: the client is unblocked
U: the client is connected via a Unix domain socket
x: the client is in a MULTI/EXEC context
t: the client enabled keys tracking in order to perform client side caching
R: the client tracking target client is invalid
B: the client enabled broadcast tracking mode
```
The file descriptor events can be:
```
r: the client socket is readable (event loop)
w: the client socket is writable (event loop)
```
## Notes
New fields are regularly added for debugging purpose. Some could be removed
in the future. A version safe Redis client using this command should parse
the output accordingly (i.e. handling gracefully missing fields, skipping
unknown fields).
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