FLUSHDB
Syntax
FLUSHDB [ASYNC | SYNC]
- Available since:
- 1.0.0
- Time complexity:
- O(N) where N is the number of keys in the selected database
- ACL categories:
-
@keyspace
,@write
,@slow
,@dangerous
,
Delete all the keys of the currently selected DB. This command never fails.
By default, FLUSHDB
will synchronously flush all keys from the database.
Starting with Redis 6.2, setting the lazyfree-lazy-user-flush configuration directive to "yes" changes the default flush mode to asynchronous.
It is possible to use one of the following modifiers to dictate the flushing mode explicitly:
ASYNC
: flushes the database asynchronouslySYNC
: flushes the database synchronously
Note: an asynchronous FLUSHDB
command only deletes keys that were present at the time the command was invoked. Keys created during an asynchronous flush will be unaffected.
Behavior change history
>= 6.2.0
: Default flush behavior now configurable by the lazyfree-lazy-user-flush configuration directive.
RESP2/RESP3 Reply
Simple string reply:OK
.
History
- Starting with Redis version 4.0.0: Added the
ASYNC
flushing mode modifier. - Starting with Redis version 6.2.0: Added the
SYNC
flushing mode modifier.