Redis Configuration File Overview

The Redis configuration file resides in the Redis installation directory with the filename redis.conf.

Configuration Methods

Method 1: Direct modification of the redis.conf file content.

Method 2: Using the CONFIG command to view or modify settings.

CONFIG Command Usage

Viewing Configuration:

# Retrieve specific configuration item or use * for all items
CONFIG GET config_item_name

Setting Configuration:

# Modify configuration value
CONFIG SET config_item_name new_value

Essential Configuration Parameters

Parameter Name	Description
daemonize no (default)	Controls whether Redis runs as a background process. Set to yes to enable daemon mode.
pidfile /var/run/redis.pid	When running as a daemon, Redis writes its process ID to this file location.
port 6379	Defines the port Redis listens on. Default is 6379, chosen based on the numeric representation of "MERZ" from Italian singer Alessia Merz's name.
bind 127.0.0.1	Specifies the host address to bind to.
timeout 300	Closes client connections after specified seconds of inactivity. Set to 0 to disable.
loglevel verbose	Sets logging level: debug, verbose, notice, warning. Default is verbose.
logfile stdout	Determines log output method. Defaults to standard output.
databases 16	Number of databases available. Use SELECT <database_id> to choose database.
save <seconds> <changes>	Defines synchronization conditions. Default includes: save 900 1 save 300 10 save 60 10000 This means sync after 1 change in 900 seconds, 10 changes in 300 seconds, or 10000 changes in 60 seconds.
rdbcompression yes	Enables compression when storing data locally using LZF algorithm.
dbfilename dump.rdb	Name of the local database file. Default is dump.rdb.
dir ./	Directory where local database files are stored.
slaveof <master_ip> <master_port>	Configures master server IP and port when operating as slave instance.
masterauth <master_password>	Password for authenticating with protected master server.
requirepass foobared	Sets connection password. Clients must authenticate using AUTH command.
maxclients 128	Maximum concurrent client connections. Set to 0 for unlimited.
maxmemory <bytes>	Memory limit for Redis. When exceeded, Redis attempts to remove expired keys before refusing write operations.
appendonly no	Enables append-only file logging for each update operation. Default is disabled.
appendfilename appendonly.aof	Name of the append-only log file. Default is appendonly.aof.
appendfsync everysec	Log synchronization strategy with three options: no: OS-controlled sync always: Sync after each operation everysec: Sync every second (default)
vm-enabled no	Enables virtual memory mechanism to store less-frequently accessed data on disk.
vm-swap-file /tmp/redis.swap	Path to virtual memory swap file. Should not be shared between instances.
vm-max-memory 0	Threshold for moving data to virtual memory. When set to 0, all values are stored on disk.
vm-page-size 32	Page size for swap files. Recommended 32-64 bytes for small objects, larger sizes for bigger objects.
vm-pages 134217728	Number of pages in swap file. Page table consumes memory at rate of 1 byte per 8 pages.
vm-max-threads 4	Thread count for swap file operations. Should not exceed CPU core count.
glueoutputbuf yes	Combines smaller response packets into single responses for efficiency.
hash-max-zipmap-entries 64 hash-max-zipmap-value 512	Thresholds for switching to specialized hash algorithm for large datasets.
activerehashing yes	Enables active rehashing for improved performance during hash table resizing.
include /path/to/local.conf	Includes additional configuration files for multi-instance setups.