garbage-collection

问题 I have tried to Google a lot about Rails Garbage collector, but I didn't get a reliable answer. Has anyone got a source to show how garbage collection is implemented in Rails? How can we control it? 回答1: Rails is a framework, not a language. The language behind Rails is called Ruby. This means there is no notion of Garbage Collector in Rails. You should search for documentation about the Ruby Garbage Collector. You can start from the Ruby GC module. The GC module provides an interface to Ruby

问题 On collection, the garbage collector copies all live objects into another memory space, thus discarding all garbage objects in the process. A forward pointer to the copied object in new space is installed into the 'old' version of an object to ensure the collector updates all remaining references to the object correctly and doesn't erroneously copy the same object twice. This obviously works quite well for stop-the-world-collectors. However, since pause times are long with stop-the-world,

问题 Is there a tool or method to locate strong references cycles in my SWIFT code? A strong reference cycle is when two instances of classes reference each other without the proper safeties ( weak / unowned ) hence preventing the garbage collector from disposing of them once all the variables I created stopped referencing those objects. 回答1: The method for finding strong reference cycles is the same in Swift as it is in Objective-C. You'd run the app from Xcode, exercise the app sufficiently to

问题 How do you pin memory allocated by Marshal.AllocHGlobal()? My first attempt was the following: int bytes = 10; IntPtr ip = Marshal.AllocHGlobal(bytes); GCHandle iph = GCHandle.Alloc(ip, GCHandleType.Pinned); Although I think this only pins the IntPtr and not the block of memory referred to by the IntPtr . 回答1: The memory allocated by AllocHGlobal is already pinned. the IntPtr that is returned is the address of the pinned location. UPDATE: To be pedantic you can't actually "pin" the memory

问题 I have created a doubly linked list. My list contains only 2 elements (suppose node1 and node2 ) and I want to delete the head pointer which points to the first node ( node1 ) in the list. Because in Cpython the primary algorithm for garbage collection is reference counting. Now my question is -( Example-1 ) if I set the self.head to self.head = self.head.next and set node2 prev (previous) attribute to None - does this delete the first node completly from the memory? Because the node1 has now

问题 This question already has answers here : How does Java GC call finalize() method? (4 answers) How finalizable objects takes at least 2 garbage collection cycles before it can be reclaimed? (2 answers) why allocation phase can be increased if we override finalize method? (1 answer) Closed 11 months ago . My understanding is that GCs like ParallelGC and G1 are "generational" collectors. Garbage Collection almost happens as a byproduct, since you move all live objects to a new heap region and

问题 This question already has answers here : How does Java GC call finalize() method? (4 answers) How finalizable objects takes at least 2 garbage collection cycles before it can be reclaimed? (2 answers) why allocation phase can be increased if we override finalize method? (1 answer) Closed 11 months ago . My understanding is that GCs like ParallelGC and G1 are "generational" collectors. Garbage Collection almost happens as a byproduct, since you move all live objects to a new heap region and

问题 This question already has answers here : How does Java GC call finalize() method? (4 answers) How finalizable objects takes at least 2 garbage collection cycles before it can be reclaimed? (2 answers) why allocation phase can be increased if we override finalize method? (1 answer) Closed 11 months ago . My understanding is that GCs like ParallelGC and G1 are "generational" collectors. Garbage Collection almost happens as a byproduct, since you move all live objects to a new heap region and

问题 This question already has answers here : How does Java GC call finalize() method? (4 answers) How finalizable objects takes at least 2 garbage collection cycles before it can be reclaimed? (2 answers) why allocation phase can be increased if we override finalize method? (1 answer) Closed 11 months ago . My understanding is that GCs like ParallelGC and G1 are "generational" collectors. Garbage Collection almost happens as a byproduct, since you move all live objects to a new heap region and

问题 This is a screen shot of a JVM (win64, 6u17) running ActiveMQ, after every garbage collection the heap size is reducing. As the heap size reduces garbage collection gets more frequent and the heap reduces more quickly. Eventually the VM locks up as it's spending all it's time in GC. -Xms is the default and -Xmx is 2048mb. What is happening!!? How can I avoid this? http://imagebin.org/92614 Shrinking heap http://imagebin.org/index.php?mode=image&id=92614 n.b originally posted on serverfault