What do you know about up buckets?
sobes.tech AI
Answer from AI
Up buckets (super-evictable buckets) are a mechanism in Android, introduced starting from Android 10 (API level 29), used to manage application resources (CPU time) based on user behavior and battery level. They complement the existing "battery saving modes" (App Standby Buckets).
When the device is connected to a power source and actively used, the system temporarily places the corresponding application into an "up bucket." Applications in this bucket receive higher priorities and fewer restrictions on background operations, network activity, and access to other resources compared to applications in regular buckets (active, working_set, frequent, rare).
This allows applications to respond faster to user actions and perform tasks seamlessly while the device is charging and in use. When the device is charged or disconnected from power, the application can be moved back to its standard bucket depending on recent usage.
Using up buckets is transparent to developers in most cases, but understanding their working principle helps optimize background activity, especially in scenarios requiring high performance during device charging. Developers cannot directly place an application into an "up bucket"; this is managed by the system.
Key points:
- Introduced: Android 10 (API level 29).
- Purpose: To relax resource restrictions for applications when the device is charging and actively used.
- Trigger: Device charging state and user activity.
- Effect: Increased priority and fewer restrictions for background tasks.
- Management: Fully managed by the system; developers cannot control this directly.
- Complement: Works together with App Standby Buckets.
Understanding up buckets is important for diagnosing and optimizing application behavior in various device states. For example, if a background task runs slowly despite the device charging and being actively used, it may be related not to up buckets but to other factors.