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Watch Redis commands live for a short time (MONITOR)

harmlessRedis and Memcacheddebian, ubuntu
Adjust the values, the command updates live
user@server
timeout 10 redis-cli MONITOR

Prints every incoming command with timestamp, database number and client address, and stops automatically after the given time. Useful for seeing whether a website uses the cache at all or which keys are read during a page request. Pipe through | grep to filter for specific keys.

Note: On busy servers, MONITOR costs noticeable performance and can halve throughput. Use it only briefly and never leave it running. The output may contain sensitive data.

Also searched as

  • what is wordpress writing to redis
  • watch redis commands live
  • redis monitor command

Related one-liners

All in Redis and Memcached

Check whether Redis is reachable

$redis-cli -h 127.0.0.1 -p 6379 ping
harmlessRedis and Memcached

Connect to Redis over a Unix socket

$redis-cli -s /run/redis/redis-server.sock ping
harmlessRedis and Memcached

Count Redis keys by pattern without blocking the server

$redis-cli -n 0 --scan --pattern '*transient*' | wc -l
harmlessRedis and Memcached

Count the keys in a Redis database

$redis-cli -n 0 DBSIZE
harmlessRedis and Memcached

Find the biggest keys in Redis

$redis-cli -n 0 --bigkeys
harmlessRedis and Memcached

Flush a single Redis database (FLUSHDB)

$redis-cli -n 0 FLUSHDB
destructiveRedis and Memcached

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The commands on myline.de act directly on servers, files and databases. A wrong path or placeholder can delete data irreversibly or make a server unreachable.

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  • Understand what a command does before running it, and check every placeholder.
  • Make a backup first and, if possible, try it on a test system.
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