dropbox oom

One, what is overcommit or oom problem Linux replies "Yes" to most requests for memory so that more programs can be run. Memory is not used immediately after the memory is applied. This technique is called overcommit. OOM Killer (oom=out-of-memory) occurs when Linux discovers that there is not enough memory. It chooses to kill some processes (user-state processe

The three themes of image caching, gestures, and oom are put together because these three issues are often linked in the Android application development process. First, preview large image needs to support gesture scaling, rotation, translation, and other operations; Secondly, the picture needs to be cached locally, avoid frequent access to the network; Finally, the image (Bitmap) is a large memory footprint of the Android, involving HD Big image proc

The main content of this article from Android Doc, I translated and done some processing, English good friends can also directly read the original. Http://developer.android.com/training/displaying-bitmaps/index.html Load large pictures efficientlyWe often use a lot of pictures when we write Android programs, and different pictures always have different shapes and sizes, but in most cases, these pictures are larger than the size we need for our programs. For example, most of the pictures displa

This error is often encountered in developing image video applications. Android Memory consists of Dalvik and native 2 parts, Dalvik is the Java heap, created by the object is assigned here,and native is the memory that is applied by C + +Bitmap is assigned in one way (android3.0, the system is assigned by default by Dalvik). Of course, regardless of the way 2 parts plus no more than Android's memory limit on a single program. 1. The memory of a process can consist of 2 parts: Java uses memory,

One recently written application involves using the GridView display picture, and when using the Baseadapter traditional implementation, the Oom situation occurs when scrolling quickly on a real machine.A temporary solution is to change the image size and reduce the memory. This method is simple but not secure. If there are enough pictures, there is still an oom situation.An efficient way is to use asynchro

time spent on pointer positioning (based on the pointer positioning of object instance data), and because object access is very frequent in Java, this overhead is a significant execution cost. For a hotspot, the second option is chosen.3. Common Oom and SOFOom is divided into two situations:memory Overflow (Overflow)Andmemory Leak (Leak)。OOM：OutOfMemoryError Exception,ThatMemory OverflowWhen the program is requesting memory,There is not enough room f

. inSampleSize = 2; int outWidth = bitmapFactoryOptions. outWidth; int outHeight = bitmapFactoryOptions. outHeight; bmap = BitmapFactory. decodeFil E (picture. getAbsolutePath (), bitmapFactoryOptions); float imagew = 150; float imageh = 150; int yRatio = (int) Math. ceil (bitmapFactoryOptions. outHeight/imageh); int xRatio = (int) Math. ceil (bitmapFactoryOptions. outWidth/imagew); if (yRatio> 1 | xRatio> 1) {if (yRatio> xRatio) {bitmapFactoryOptions. inSampleSize = yRatio;} else {bitmapFactory

Using axis call WebService, the system has been running for a period of time, an OOM has occurred, fortunately, the error message is noted in the log.Exception in Thread "Thread-1301" Java.lang.OutOfMemoryError:Java heap Spaceat Org.apache.xerces.dom.DeferredDocumentImpl.createChunk (Unknown Source) at Org.apache.xerces.dom.DeferredDocumentImpl.ensureCapacity (Unknown Source) at Org.apache.xerces.dom.DeferredDocumentImpl.createNode (Unknown Source) at

As a C/C ++ Program Staff, how should we deal with Oom, especially as a Linux Server developer? Many people like logical 'perfection' solutions,The following two are common examples:: 1. When new fails, an exception is thrown, and catch and reject are performed on the outside.2. The program determines the return value of malloc/New. If it is null, the request is rejected. Both seemingly perfect solutions have huge defects. 1. If a new error

-xss128k: This JVM parameter is used to configure the stack size to 128kBecause the stack is thread-private (it is unclear to understand the structure of the JVM virtual machine), the exception is generated if we start a thread and call a recursive in the thread./** * VM args:-xss128k * */public class Javavmstacksof {private int stacklength = 1;public void Stackleak () {Stackleng Th++;stackleak ();} public static void Main (string[] args) throws Throwable {javavmstacksof

The Android custom HorizontalScrollView creates multiple images (controls) and is not afraid of OOM's horizontal sliding effect, Reprinted please indicate the source: http://blog.csdn.net/lmj623565791/article/details/38140505 Since Gallery was abandoned by Google, Google recommends using ViewPager and HorizontalScrollView to achieve Gallery. It is true that HorizontalScrollView can achieve Gallery, but there is a big problem in HorizontalScrollView. If you only want to display a small number of

Bitmapfactory must be used with caution, which may cause OOM Bitmap bitmap = bitmapfactory. decoderesource (getresources (), R. drawable. xx ); I use bitmapfactory to convert drawable into bitmap, causing OOM to be loaded multiple times, so use it with caution. The image resources after bitmapfactory. decoderesource are strongly referenced, and GC collection is useless. When GC is happy, weak references

one, the sequence of statically configured frame animations in Animation_list.xml, as follows:second, the method is called, as follows:Mimageview.setimageresource (r.drawable.animation_list); animationdrawable = (animationdrawable) Mimageview.getdrawable (); Animationdrawable.start (); Of course, you can also animate the playback of animations in a method, calling the following method: void Setoneshot (Boolean oneShot) : Sets whether animationdrawable executes once, true once, and false loops ca

Anyone who learns Android should know that Glide is an incredibly powerful image loading library that has a good caching mechanism in it for us to choose from, and we only need one parameter call (Diskcachestrategy ()), Without having to implement it yourself like the Universal-image-loader class. It is because it is so useful that it makes it easy to overlook some important details. Android's Bitmap object is one of the most likely culprits for oom,

Java heap memory overflow As long as you constantly create objects and ensure that there is an accessible path between the GC roots and objects to avoid the garbage collection mechanism clearing these objects, The memory overflow exception occurs when the number of objects reaches the maximum heap capacity limit. The Code is as follows: import java.util.ArrayList;import java.util.List;public class HeapOOM { static class OOMObject { } public static void main(String[] args) { List

Dalvik imposes limits on the maximum memory of Android applications, while parsing images is resource-consuming. For example, parsing a 2048*1536 bitmap requires 12 Mb of memory, which usually results in oom. Solution: reduce the quality of the image to be loaded Based on the device resolution. For example, if the device resolution is 480*320, you only need to set the image to be loaded (for example, 2048*1536) you can compress it to 480*320. The fol

constant, the static variable and so on. So if a program loads too many classes, or uses such dynamic proxy generation techniques as reflection, gclib, and so on, it can cause a memory overflow in that area, which is generally the error message when a memory overflow occurs in this area: Outofmemoryerror:permgem Space3. Thread stack Overflow (java.lang.StackOverflowError) Thread stacks a piece of memory structure that is unique to threads, so a thread stack problem must be an error that o

2013-07-06 Lead:Recently, I was developing new software, processing images, and having an OOM problem. Body:The images obtained from the image library or camera are usually relatively large. If you do not properly handle them, release the recycle in time and you will often encounter memory problems. But IProgramReleased in time after use, just jump in two processes, there may be cache, sad reminder ah. Finally, rgb_565 format is used when U

*config of the picture.Assume that config is set to argb_8888. Then the above config is 4. A 480*320 picture takes up memory that is 480*320*4 byte.Someone in front said the concept of 8M, in fact, by default, the Android process memory consumption is 16M, because bitmap he holds data in addition to Java, the underlying C + + Skia graphics library will also hold a Skbitmap object. Therefore the general picture occupies memory recommended size should not exceed 8M. This can be adjusted. You can s

(urlPath).execute().body(); ifnull) { return responseBody.byteStream();//返回图片流 } catch (IOException e) { e.printStackTrace(); }Because of retrofit some internal encapsulation, it is not recommended to get the stream for a long time.You can also get flows like this: finalnew URL(urlString); urlConnection = (HttpURLConnection) url.openConnection(); urlConnection.getInputStream();Iv. ConclusionThe first t