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Diffstat (limited to 'iredis/data/commands/flushall.md')
| -rw-r--r-- | iredis/data/commands/flushall.md | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/iredis/data/commands/flushall.md b/iredis/data/commands/flushall.md index 8cc7560..ff454c1 100644 --- a/iredis/data/commands/flushall.md +++ b/iredis/data/commands/flushall.md @@ -1,19 +1,26 @@ Delete all the keys of all the existing databases, not just the currently selected one. This command never fails. -The time-complexity for this operation is O(N), N being the number of keys in -all existing databases. +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. -## `FLUSHALL ASYNC` (Redis 4.0.0 or greater) +It is possible to use one of the following modifiers to dictate the flushing +mode explicitly: -Redis is now able to delete keys in the background in a different thread without -blocking the server. An `ASYNC` option was added to `FLUSHALL` and `FLUSHDB` in -order to let the entire dataset or a single database to be freed asynchronously. +- `ASYNC`: flushes the databases asynchronously +- `!SYNC`: flushes the databases synchronously -Asynchronous `FLUSHALL` and `FLUSHDB` commands only delete keys that were -present at the time the command was invoked. Keys created during an asynchronous -flush will be unaffected. +Note: 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. @return @simple-string-reply + +@history + +- `>= 4.0.0`: Added the `ASYNC` flushing mode modifier. +- `>= 6.2.0`: Added the `!SYNC` flushing mode modifier and the + **lazyfree-lazy-user-flush** configuration directive. |