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# totalCostLimit

The maximum total cost that the cache can hold before it starts evicting objects.

```
var totalCostLimit: Int { get set }
```

## Discussion

If `0`, there is no total cost limit. The default value is `0`.

When you add an object to the cache, you may pass in a specified cost for the object, such as the size in bytes of the object. If adding this object to the cache causes the cache’s total cost to rise above `totalCostLimit`, the cache may automatically evict objects until its total cost falls below `totalCostLimit`. The order in which the cache evicts objects is not guaranteed.

This is not a strict limit, and if the cache goes over the limit, an object in the cache could be evicted instantly, at a later point in time, or possibly never, all depending on the implementation details of the cache.

## See Also

[`setObject(_:forKey:cost:)`](/documentation/Foundation/NSCache/setObject(_:forKey:cost:))

Sets the value of the specified key in the cache, and associates the key-value pair with the specified cost.


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