# SCRIPT FLUSH Flush the Lua scripts cache. By default, `SCRIPT FLUSH` will synchronously flush the cache. 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 cache asynchronously * `SYNC`: flushes the cache synchronously For more information about [`EVAL`](https://redis.io/docs/latest/commands/eval) scripts please refer to [Introduction to Eval Scripts](https://redis.io/docs/latest/develop/interact/programmability/eval-intro). ## Behavior change history * `>= 6.2.0`: Default flush behavior now configurable by the **lazyfree-lazy-user-flush** configuration directive. ## Return information {{< multitabs id="script-flush-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`.