garbage-collection

问题 Lets say I have a managed bean called A that is @RequestScoped Let's say A has a reference to another managed bean B and B is declared to be @SessionScoped . Will the fact that A has a reference to another bean with longer scope prevent A from getting garbage collected at the end of the HttpRequest ? Will the situation change the other way around ie if B contains a reference to A ? if yes then why ? 回答1: Will the fact that A has a reference to another bean with longer scope prevent A from

问题 Lets say I have a managed bean called A that is @RequestScoped Let's say A has a reference to another managed bean B and B is declared to be @SessionScoped . Will the fact that A has a reference to another bean with longer scope prevent A from getting garbage collected at the end of the HttpRequest ? Will the situation change the other way around ie if B contains a reference to A ? if yes then why ? 回答1: Will the fact that A has a reference to another bean with longer scope prevent A from

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 5 years ago . Improve this question The question is just for research purposes. I've read many books about C# and this question always comes to my mind. What I understood that C# is managed code and all garbage collection occurs when CLR decides when to run garbage collection. Let's start. Let's imagine that I

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 5 years ago . Improve this question The question is just for research purposes. I've read many books about C# and this question always comes to my mind. What I understood that C# is managed code and all garbage collection occurs when CLR decides when to run garbage collection. Let's start. Let's imagine that I

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 5 years ago . Improve this question The question is just for research purposes. I've read many books about C# and this question always comes to my mind. What I understood that C# is managed code and all garbage collection occurs when CLR decides when to run garbage collection. Let's start. Let's imagine that I

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 5 years ago . Improve this question The question is just for research purposes. I've read many books about C# and this question always comes to my mind. What I understood that C# is managed code and all garbage collection occurs when CLR decides when to run garbage collection. Let's start. Let's imagine that I

问题 A java program is giving this warning, with JRE 10.0.2: Java HotSpot(TM) 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release. What is the recommended replacement for this switch? 回答1: Dropping support for CMS and then removing the CMS code, or at least more thoroughly segregating it, will reduce the maintenance burden of the GC code base and accelerate new development. The G1 garbage collector is intended, in the

问题 I am experimenting with PipedInputStream and PipedOutputStream and can't understand why the following code would result in a Java Heap exhaustion problem. All transient String objects created should be gc -ed. Why then do I get an OutOfMemoryError ? I am trying to write and read 1000 String objects each 1 million characters long. The below code fails about half-way through even when invoked with -Xmx2g . What's more the trace: written string #453 read string #453 written string #454 Exception

问题 Clarifying the question a bit: Garbage collectors such as those used by the JVM involve a lot of complexity as a result of the nature of the languages they support. What simplifications would be afforded to a garbage collector purpose-built for a pure, functional, eagerly-evaluated programming language compared to say, the JVM garbage collector? 回答1: I'm barely an expert in functional languages design but when thinking about your question, immediately the following topics come to my mind:

问题 The JVM can easily update the references of local variables, static references, class instances or object array instances when moving an object in heap. But how can it update the references pushed to the operand stack? 回答1: There is no fundamental difference between a local variable and an entry in the operand stack. Both live in the same stack frame. Neither is formally declared and both need the JVM to perform inference to recognize their actual use. The following code public static void