out-of-memory

I'm creating an android app that utilizes the camera to take pictures and then sends them to a server based on user input. I'm currently having some problems with the camera intent. My main problems are : Getting a picture that seems to be rotated when compared to the position it was taken. When I try to fix this Rotation I get an OutOfMemoryError So mainly I need to make sure that the orientation of the picture doesn't change and that I don't get an OutOfMemoryError. Here is the function that uses the camera Intent to take the picture. private void dispatchTakePictureIntent(int actionCode) {

I wrote a custom index to a custom table which uses 500MB of heap for 500k strings. Only 10% of the strings are unique; the rest are repeats. Every string is of length 4. How i can optimize my code? Should I use another collection? I tried to implement a custom string pool to save memory: public class StringPool { private static WeakHashMap<String, String> map = new WeakHashMap<>(); public static String getString(String str) { if (map.containsKey(str)) { return map.get(str); } else { map.put(str, str); return map.get(str); } } } private void buildIndex() { if (monitorModel.getMessageIndex() ==

I have 10 threads writing thousands of small buffers (16-30 bytes each) to a huge file in random positions. Some of the threads throw OutOfMemoryException on FileStream.Write() opreation. What is causing the OutOfMemoryException ? What to look for? I'm using the FileStream like this (for every written item - this code runs from 10 different threads): using (FileStream fs = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write, FileShare.ReadWrite, BigBufferSizeInBytes, FileOptions.SequentialScan)) { ... fs.Write(); } I suspect that all the buffers allocated inside the FileStream don't

I have a C#/WPF application that is meant to run on a small panel PC with 512 MB of memory. If it is left to run, an OutOfMemoryException is eventually thrown. This can take 12+ hours up to 2 days to happen. Using both ProcessExplorer and .NET Memory Profiler, I see no evidence that the memory used by my application is growing over time. There is just a typical pattern of a little growth followed by garbage collection. I've added code to print out all running processes and their memory information when the exception is thrown. I'm currently just waiting around for it to happen again. I should

I wrote a program to simulate MetaSpace OOM. But I found that MetaSpace Size is almost always twice as big as Used MetaSpace . Why? I run my program with flag -XX:MaxMetaspaceSize=50m , the program throw OOM when Used MetaSpace reached about 25M rather than 50M, Why? expoter I think the following two experiment will explain what does the gap between MetaSpace Size and Used MetaSpace mean: EXP-1 : load one class per ClassLoader, I got this: EXP-2 : load five classes per ClassLoader, I got this: As Java 8 document says: Space is requested from the OS and then divided into chunks. A class loader