# FLUSHALL












Delete all the keys of all the existing databases, not just the currently selected one.
This command never fails.

By default, `FLUSHALL` will synchronously flush all the databases.
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 databases asynchronously
* `SYNC`: flushes the databases synchronously


FLUSHALL SYNC


## Notes

* An asynchronous `FLUSHALL` command only deletes keys that were present at the time the command was invoked. Keys created during an asynchronous flush will be unaffected.
* This command does not delete functions.
* Other than emptying all databases (similar to `FLUSHDB`), this command clears the RDB persistence file, aborts any snapshot that is in progress, and, if the `save` config is enabled, saves an empty RDB file.

## Behavior change history

*   `>= 6.2.0`: Default flush behavior now configurable by the **lazyfree-lazy-user-flush** configuration directive.

## Return information

{{< multitabs id="flushall-return-info" 
    tab1="RESP2" 
    tab2="RESP3" >}}

[Simple string reply](../../develop/reference/protocol-spec#simple-strings): `OK`.

-tab-sep-

[Simple string reply](../../develop/reference/protocol-spec#simple-strings): `OK`.