outofmemoryexception

concurrent This mode imitates server GC, but the collection occurs in the process that causes GC. This mode is recommended for applications that run on a single CPU. You can modify the application-level configuration to disable concurrency. What is the significance of enabling gcserver? It mainly involves garbage collection, which can avoid the impact of spam. For examples to verify this problem, refer to this article memory management (III)-. Net CLR ?, The article contains a testCode.

consume can remain above 90 MB, and to some extent, the allocation may fail. For a hosted application, an OutOfMemoryException (OOM) is implemented on the surface. The application that triggers OutOfMemoryException and processes it will end. To be exact, when the application reaches the top of the variable value depends on the running status inside the system. The Resource Manager Component in the mobile p

3. system. outofmemoryexception First, let's take a lookCode Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> Bitmap BMP temp = New Bitmap (image );Bitmap BMP = New Bitmap (BMP temp );BMP temp. Dispose (); Bitmap BMP 2=BMP. Clone (NewRectangle (1,1, BMP. Width, BMP. Height), pixelformat. format24bpprgb ); In the previous section, we used the method of reading image files describe

+ + programs use the XERCES-C, the code snippet is as follows: Xercesdomparser *parser = NULL; Domtreeerrorreporter *errreporter = NULL; DOMDocument *document = NULL; Domnode *domrootnode = NULL; try {//Initialize parser = new Xercesdomparser; errreporter = new Domtreeerrorreporter (); Parser->seterrorhandler (Errreporte R); Parser->parse ("D//test2.xml"); if (Errreporter->getsawerrors ()) {printf ("XML format error/n"); Delete errreporter; Delete parser; return-1}} catch (const

Case and analysis Problem background In Tomcat, the following code is inside the WebApp, causing a WebappClassLoader leak that cannot be reclaimed. public class MyCounter {private int count = 0; public void Increment () {count++; public int GetCount () {return count; } public class Mythreadlocal extends threadlocal The above code, as long as LeakingServlet it is invoked once, and the thread that executes it does not stop, it can cause a WebappClassLoader leak. Each time yo

* result = HeapAlloc (ph, heap_zero_memory, size);if (result = = null) throw new OutOfMemoryException ();return result;}Copies count bytes from Src to DST. The source and destinationBlocks are permitted to overlap.public static void Copy (void* src, void* dst, int count){byte* PS = (byte*) src;byte* PD = (byte*) DST;if (PS > PD){for (; Count!= 0; count--) *pd++ = *ps++;}else if (PS {for (PS = count, pd + = count, Count!= 0; count--) *--pd = *--ps;}}Fr

C # Different exception types in the processing ., memberaccessexception access error: type members cannot be accessed argumentexception parameter error: Invalid method parameter argumentnullexception parameter is null: an unacceptable null parameter arithmeticexception is passed to the method. calculation error: exceptions caused by mathematical operations have a wide coverage. The arraytypemismatchexception array type does not match dividebyzeroexception. The format of the zero division format

/StringJoiner.html Http://blog.zhaojie.me/2009/11/string-concat-perf-1-benchmark.html Http://blog.zhaojie.me/2009/12/string-concat-perf-3-profiling-analysis.html Appendix: Be careful when there are two types of exceptions: outofmemory and stackoverflow. In the last few nights, I will review the I. "insufficient memory" An outofmemoryexception is thrown when the memory capacity exceeds the rated capacity. Why does it exceed the

Outofmemoryexception is very likely to occur when computing requires a lot of memory space. System. runtime. memoryfailpoint provides the memory check function before running computation that requires large memory. When calling this method, perform the following steps (if you do not fully determine the size of the required memory, you can pass an approximate value) 1. Check whether the system's page files have sufficient available space and whether

1st generation. How do you know that the data in the 0th generation is not reachable and referenced? In the 1st generation, only the marked object will be checked This can also improve the performance of garbage collection. In short, the garbage collector designed by Microsoft is improving the performance of your program everywhere. He said so, do you feel it? If three generations of memory are still not allocable, an outofmemoryexception will

generation is full, the Eden generation is full, and full vor does not cause GC. Full GC will be triggered when the old generation is full, and full GC will recycle the young and old generations at the same time. Full GC will also be triggered when the permanent generation is full, which will cause the uninstallation of the class and method metadata. Another problem is when outofmemoryexception will be thrown, not when the memory is exhausted. J

The CPU usage of IIS 6 processes is 50%. After a period of time, the website will collapse. How can this problem be solved?Hardware configuration: Xeon dual-core 3.4 GB + 2 GB memorySoftware Configuration: win2003 Enterprise Server + IIS 6Symptoms: frequent occurrence of "is 6 process CPU usage 50%, after a period of time, the website collapsed"Solution:1. The reason for memory is exclusive. How to handle outofmemoryexception?

emphasize, the younger generation is full of Eden, Survivor is full and does not cause GC The full gc,full GC will be collected at the same time as the old generation. Full GC will also be thrown when the permanent fill will cause the unload of class and method meta information Another problem is when OutOfMemoryException is thrown, not when the memory is empty jvm98% time is spent in memory recycling Less than 2% of memory

, and the GC recycles only the younger generation. When you need to emphasize, the younger generation is full of Eden, Survivor is full and does not cause GC The full gc,full GC will be collected at the same time as the old generation. Full GC will also be thrown when the permanent fill will cause the unload of class and method meta information Another problem is when OutOfMemoryException is thrown, not when the memory is empty j

The CPU usage of IIS 6 processes is 50%. After a period of time, the website will collapse. How can this problem be solved?Hardware configuration: Xeon dual-core 3.4 GB + 2 GB memorySoftware Configuration: win2003 Enterprise Server + IIS 6Symptoms: frequent occurrence of "is 6 process CPU usage 50%, after a period of time, the website collapsed"Solution:1. The reason for memory is exclusive.How to handle outofmemoryexception?

, _val2 =1; Public Static voidGo () {monitor.enter (_locker); //using try/finally and Monitor mode Try { if(_val2! =0) {Console.WriteLine (_val1/_val2);} _val2=0; } finally{monitor.exit (_locker);} }}In fact, the above code is flawed, consider a situation, a thread executed Monitor.Enter (_locker) after the hang (such as insufficient memory to throw a OutOfMemoryException exception), because it did not enter the try/fi

recycling), the 2nd generation, and of course the GC does not sometimes collect garbage in the order of No. 0, 1, and 2 generations, depending on the runtime, or manually calling Gc.collect (i) to specify the generation of the collection. When the 2nd generation recovery is unable to obtain enough memory, then the system will throw OutOfMemoryException exception, after a few GC after several 0 generations of an object still exists, then it will be mo

first-level cache. as follows:Session session = Hibernateutil.currentsession ();Transaction tx = Session.begintransaction (); for(inti = 0;I {Student stu = new Student ();Session.save (Stu);}Tx.commit ();Session.close ();when you save 50,000 or more objects, the program may throw a OutOfMemoryException exception because hibernate caches all newly added objects in the first level cache. Memory overflow. To solve this problem, you need to set the numbe

pointer to the memory address and the memory length (capacity). Returns null if the function is not implemented for the current Java virtual machine, or throws an exception. If no storage is available, a outofmemoryexception will be thrown. Jobject Newdirectbytebuffer (void* address, jlong capacity); The Getdirectbufferaddress function returns an address pointer to the Java.nio.ByteBuffer object bein

= System.Text.Encoding.GetEncoding ("GB2312"); Rs. Appendheader ("Content-disposition", "attachment;filename=" + filename); Rs. ContentType = "Application/ms-excel"; Rs. Write (EXCELSTR); Rs. End (); } By this time I think there should be a friend to see the problem. This method produces a small amount of Excel data does not occur when the problem, when the data is large, the problem came out. Because a variable of type string is defined inside the method, the content that needs to be