# ALTER SYSTEM CLEAR

Clear CPU, GPU, or RENDER memory. Available to super users only.

```sql
ALTER SYSTEM CLEAR (CPU|GPU|RENDER) MEMORY
```

### Examples

```sql
ALTER SYSTEM CLEAR CPU MEMORY
```

```sql
ALTER SYSTEM CLEAR GPU MEMORY
```

```sql
ALTER SYSTEM CLEAR RENDER MEMORY
```

{% hint style="info" %}
Generally, the server handles memory management, and you do not need to use this command. If you are having unexpected memory issues, try clearing the memory to see if performance improves.
{% endhint %}