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# Cache
All query results could be locally cached.
This feature must be explicitly turned on in the `Settings` inner class.
```python
class Sample(Document):
num: int
name: str
class Settings:
use_cache = True
```
Beanie uses LRU cache with expiration time.
You can set `capacity` (the maximum number of the cached queries) and expiration time in the `Settings` inner class.
```python
class Sample(Document):
num: int
name: str
class Settings:
use_cache = True
cache_expiration_time = datetime.timedelta(seconds=10)
cache_capacity = 5
```
Any query will be cached for this document class.
```python
# on the first call it will go to the database
samples = await Sample.find(num>10).to_list()
# on the second - it will use cache instead
samples = await Sample.find(num>10).to_list()
await asyncio.sleep(15)
# if the expiration time was reached it will go to the database again
samples = await Sample.find(num>10).to_list()
```
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