Capture a heap dump Keep organized with collections Save and categorize content primarily based on your preferences. Capture a heap dump to see which objects in your app are utilizing up Memory Wave at the time of the capture and identify memory leaks, or memory allocation habits that results in stutter, freezes, and even app crashes. It is particularly useful to take heap dumps after an prolonged consumer session, when it may present objects still in memory that should not be there. This page describes the tooling that Android Studio gives to gather and analyze heap dumps. Alternatively, you'll be able to inspect your app memory from the command line with dumpsys and in addition see garbage collection (GC) occasions in Logcat. Android offers a managed memory setting-when Android determines that your app is not utilizing some objects, the garbage collector releases the unused memory again to the heap. How Android goes about discovering unused memory is constantly being improved, however in some unspecified time in the future on all Android variations, the system must briefly pause your code.
Most of the time, the pauses are imperceivable. Nevertheless, if your app allocates memory sooner than the system can accumulate it, your app may be delayed while the collector frees enough memory to fulfill your allocations. The delay might trigger your app to skip frames and cause seen slowness. Even in case your app would not exhibit slowness, if it leaks memory, it could actually retain that memory even whereas it is within the background. This habits can gradual the remainder of the system's memory performance by forcing unnecessary rubbish assortment occasions. Eventually, the system is pressured to kill your app course of to reclaim the memory. Then when the user returns to your app, the app course of must restart fully. For details about programming practices that may cut back your app's memory use, read Manage your app's memory. To capture a heap dump, select the Analyze Memory Wave Utilization (Heap Dump) activity (use Profiler: run 'app' as debuggable (complete knowledge)) to capture a heap dump. While dumping the heap, the quantity of Java memory would possibly increase quickly.
This is regular as a result of the heap dump happens in the identical course of as your app and requires some memory to collect the data. Allocations: Variety of allocations within the heap. Native Measurement: Complete quantity of native memory utilized by this object sort (in bytes). You will see memory here for some objects allocated in Java as a result of Android makes use of native memory for some framework courses, reminiscent of Bitmap. Shallow Measurement: Whole quantity of Java memory used by this object kind (in bytes). Retained Measurement: Whole size of memory being retained due to all instances of this class (in bytes). App heap (default): The primary heap on which your app allocates memory. Picture heap: The system boot image, containing lessons that are preloaded during boot time. Allocations here by no means transfer or go away. Zygote heap: The copy-on-write heap the place an app course of is forked from in the Android system. Arrange by class (default): Teams all allocations based on class title.
Arrange by package: Groups all allocations primarily based on package deal title. All courses (default): Reveals all lessons, including those from libraries and dependencies. Present activity/fragment leaks: Exhibits lessons which are causing memory leaks. Show mission lessons: shows only classes outlined by your project. Click a class title to open the Instance pane. Depth: The shortest variety of hops from any GC root to the chosen occasion. Native Dimension: Size of this instance in native memory. This column is seen only for Android 7.0 and higher. Shallow Measurement: Measurement of this occasion in Java memory. Retained Measurement: Measurement of Memory Wave Routine that this occasion dominates (as per the dominator tree). Click an occasion to show the Instance Details, including its Fields and References. Frequent discipline and reference sorts are structured sorts , arrays , and primitive data types in Java. Proper-click on a field or reference to go to the associated instance or line within the source code. Fields: Reveals all of the fields in this instance.