# Update

> When a EntityStorageInfoLookup is cached by a system across multiple system updates, calling this function inside the system's OnUpdate() method performs the minimal incremental updates necessary to make the object safe to use.

## Definition

* **Type:** Method
* **Namespace:** [Unity.Entities](/engine/7000.0/script-reference/unity/entities.md)
* **Assembly:** UnityEngine.EntitiesModule

## Update(SystemBase)

When a EntityStorageInfoLookup is cached by a system across multiple system updates, calling this function inside the system's OnUpdate() method performs the minimal incremental updates necessary to make the object safe to use.

```csharp
public void Update(SystemBase system)
```

### Parameters

**** (\[SystemBase]\(/engine/7000.0/script-reference/unity/entities/systembase)): The system in which this object is used.

## Update(SystemState)

When a EntityStorageInfoLookup is cached by a system across multiple system updates, calling this function inside the system's OnUpdate() method performs the minimal incremental updates necessary to make the object safe to use.

```csharp
public void Update(ref SystemState systemState)
```

### Parameters

**** (\[SystemState]\(/engine/7000.0/script-reference/unity/entities/systemstate)): The SystemState of the system in which this object is used.