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Flush a single Redis database (FLUSHDB)

destructiveRedis and Memcacheddebian, ubuntu
Adjust the values, the command updates live
user@server
redis-cli -n 0 FLUSHDB

Immediately removes all keys of the database selected with -n, without asking for confirmation. Unlike FLUSHALL, only the data of this one database number is affected. Check beforehand with redis-cli INFO keyspace which number belongs to which application.

Note: If the database holds not only cache data but also PHP sessions or queues, those are lost for good. For a single WordPress site, wp cache flush is the gentler option.

Also searched as

  • clear redis cache for one website
  • delete redis database
  • run redis flushdb

Related one-liners

All in Redis and Memcached

Flush all Redis databases (FLUSHALL)

$redis-cli FLUSHALL
destructiveRedis and Memcached

Check the Redis Object Cache status in WordPress

$wp redis status --path=/var/www/vhosts/example.com/httpdocs
harmlessRedis 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

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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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