memory

问题 We operate a Java application that we did not develop. This application uses quite a lot of memory for certain tasks, depending on the data, that is manipulated, up to 4GB. At other times, very little memory is needed, around 300MB. Once the JVM grabs hold of a lot of memory, it takes a very long time until the garbage is collected and even longer until memory is returned back to the operating system. That's a problem for us. What happens is as follows: The JVM needs a lot of memory for a

问题 This may be a stupid question, but I don't get in Python how we can use object that we did not some define or imported. Consider the following example, using Python's datetime module: from datetime import date date1 = date(2019,1,1) date2 = date(2019,1,5) type(date2-date1) #<class 'datetime.timedelta'> type(date2) #<class 'datetime.date'> Then date2-date1 is of timedelta class, even though we haven't imported this. (I could probably also cook up other examples, where we obtain objects, even

问题 This is a bit like this: Neo4j OutOfMemory problem But it's outdated and apparently so are the solutions as far as I can tell. So I'm trying to insert around 100K nodes with 5.5M relations (I actually cut down my data set so it's now more like <100K nodes with 2.8M relations). After a while, it runs out of memory and I get an exception like so: Exception in thread "GC-Monitor" java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOfRange(Unknown Source) at java.lang.String.<init

问题 I'm trying to analyse a ~800mb heap dump, which requires a bigger heap than the standard for my eclipse. however, when I go to the eclipse.ini file and set a -Xmx2g (or -Xmx2048m ) I get an error "Failed to create the Java Virtual Machine". 1) yes, I have enough memory. 2) I can change it up to exactly -Xmx976m. 3) I've tried the standalone MAT analyser and it works with -Xmx1024m, not a byte more. 4) No, 1gb is not enough to analyse that heap, I get a OOM This is the eclipse error: This is

问题 I'm trying to analyse a ~800mb heap dump, which requires a bigger heap than the standard for my eclipse. however, when I go to the eclipse.ini file and set a -Xmx2g (or -Xmx2048m ) I get an error "Failed to create the Java Virtual Machine". 1) yes, I have enough memory. 2) I can change it up to exactly -Xmx976m. 3) I've tried the standalone MAT analyser and it works with -Xmx1024m, not a byte more. 4) No, 1gb is not enough to analyse that heap, I get a OOM This is the eclipse error: This is

问题 I'm trying to analyse a ~800mb heap dump, which requires a bigger heap than the standard for my eclipse. however, when I go to the eclipse.ini file and set a -Xmx2g (or -Xmx2048m ) I get an error "Failed to create the Java Virtual Machine". 1) yes, I have enough memory. 2) I can change it up to exactly -Xmx976m. 3) I've tried the standalone MAT analyser and it works with -Xmx1024m, not a byte more. 4) No, 1gb is not enough to analyse that heap, I get a OOM This is the eclipse error: This is

问题 I'm trying to understand Swift's unsafe pointer API for the purpose of manipulating audio samples. The non-mutable pointer variants (UnsafePointer, UnsafeRawPointer, UnsafeBufferPointer) make sense to me, they are all used to reference previously allocated regions of memory on a read-only basis. There is no type method "allocate" for these variants The mutable variants (UnsafeMutablePointer, UnsafeMutableRawPointer), however, are documented as actually allocating the underlying memory.

问题 I have been looking into a memory leak issue for a while. I found a cover flow on the internet from http://www.inter-fuser.com/2010/02/android-coverflow-widget-v2.html Now I was under the impression this app was causing my outofmemory issues, and its still possible that it has something to do with it. However, I have deleted everything from my application except the splash screen. There are no other activities. and it does Nothing...... The initial intent loads the Splash Screen activity. My

问题 I am writing a program to leak memory( main memory ) to test how the system behaves with low system memory and swap memory. We are using the following loop which runs periodically and leaks memory main(int argc, char* argv[] ) { int arg_mem = argv[1]; while(1) { u_int_ptr =(unsigned int*) malloc(arg_mem * 1024 * 1024); if( u_int_ptr == NULL ) printf("\n leakyapp Daemon FAILED due to insufficient available memory...."); sleep( arg_time ); } } Above loop runs for sometime and prints the message