heap

Drools 6.3.0: Old ZiPKieModules remain in the heap after upgrading (executing scanNow in kiescanner JMX bean)

由 跟風遠走 提交于 2020-04-30 08:11:30
问题 We are using drools 6.3.0 and implemented our kiemodule as a deployable maven artifact (kjar). Our application uses this kiemodule and runs in Wildfly-10. In production, newer version of the kiemodule are automatically detected and loaded in the application by a kieScanner that runs at regular intervals. If the scanner sees a new version of the kiemodule it will load it on-the-fly and at runtime. This is very cool functionality, but recently we discovered that every time a new ZipKieModule is

Shell simulation using lists

由 十年热恋 提交于 2020-04-18 05:43:13
问题 Now i'm learning C and I have a problem with memory alocation, atleast this I understand from my code error. Code #ifndef __FILE_H__ #define __FILE_H__ #include <stdlib.h> #include <stdio.h> #include <string.h> typedef struct Files Files; typedef struct DirList DirList; typedef struct NodeFile NodeFile; typedef struct NodeDir NodeDir; typedef struct Directory { // The name of the directory char *name; // TODO: The list of files of the current directory Files *files; // TODO: The list of dirs

我到底需要多少内存(part 1)

由 徘徊边缘 提交于 2020-03-08 18:49:40
原文: http://plumbr.eu/blog/how-much-memory-what-is-retained-heap 我将需要多少内存?当你构建一个解决方案,创建一个数据结构或者选择一个算法时这个问题你可能问过自己或者别人.请问这个图是否适合在我的3G堆上,它包含1,000,000条边并且我使用HashMap存储它?我可以使用标准的集合API来构建我的自定义缓存解决方案或者他们带来的开销太大? 显然,回答这个简单的问题有点复杂.在这篇文章中我们将一窥全豹看这个坑到底有多深. 回答标题中的问题来自于几个部分.首先我们需要了解你是否对shallow heap和retained head的大小有兴趣. shallow heap比较容易 - 它仅仅是自己本身所占有的堆内存.如果计算它有一些细微差别,但是不在本文的范围内.敬请期待未来相同主题的文章. retained heap有许多计算方式更有趣.你不会对shallow heap感兴趣,在大多数情况下你的问题又可以说成"如果从内存中移除这个对象,通过垃圾回收会有多少内存被释放". 现在,我们都还记得,所有的Java垃圾回收算法都是以下的逻辑: 1. 有一些对象被GC认为是"重要的".被叫做GC root并且几乎不会被回收.比如,当前运行方法的本地变量和输入参数,程序线程,来自本地代码的引用和类似于"全局"的对象. 2. 任何从GC

In the case of using a std::unique_ptr to automatically deallocate memory upon exiting a scoped block, why not just use the stack?

由 你。 提交于 2020-03-04 18:44:25
问题 This is a great answer about smart pointers, such as unique pointers: What is a smart pointer and when should I use one?. Here is an example they provide as the simplest use of a unique pointer: void f() { { std::unique_ptr<MyObject> ptr(new MyObject(my_constructor_param)); ptr->DoSomethingUseful(); } // ptr goes out of scope -- // the MyObject is automatically destroyed. // ptr->Oops(); // Compile error: "ptr" not defined // since it is no longer in scope. } However, this begs the question:

Java : How to print heap stored as array, level by level

由 …衆ロ難τιáo~ 提交于 2020-02-22 04:46:46
问题 I have an array that represents a Max Heap. For example 84 81 41 79 17 38 33 15 61 6 so the root is max. Each mid tier node at index i can have at most two children. They would be at 2*i+1 and 2*i+2. How can i print this heap out in a level by level fashion? like 84(0) 81(1) 41(2) 79(3) 17(4) 38(5) 33(6) 15(7) 61(8) 6(9) the index of each element in the array is shown in paranthesis for clarification. i dont have to print the index. I was thinking it would be similar to printing a BST in

How we access stack variables without poping them?

由 a 夏天 提交于 2020-02-20 16:54:48
问题 As far as i know there are two kind of variables in C, stack variables and heap variables. Stack variables are fast and managed by compiler and CPU automatically. My question about stack variables are these: Are stack variables really stored in a stack FILO data structure? If so, why we can use them without poping them and losing their values? Why stack is used for storing them? What's wrong with a dequeue or list? 回答1: You, as the programmer, don't worry about pushing or popping variables on

How can you explore the managed heap in a .NET application to identify possible memory optimizations?

由 社会主义新天地 提交于 2020-02-18 13:03:37
问题 We have a .NET application which our customers consider too large for mass deployment and we would like to understand what contributes to our memory footprint and is it possible to do any better without completely abandoning .NET and wpf. We are interested in improving both Total Size and the Private Working Set (pws). In this question I just want to look at pws. VMMap typically reports a pws of 105 mb. Of this 11mb is image, 31mb is heap, 52 mb is managed heap, 7 mb is private data and the

How can you explore the managed heap in a .NET application to identify possible memory optimizations?

由 折月煮酒 提交于 2020-02-18 13:02:59
问题 We have a .NET application which our customers consider too large for mass deployment and we would like to understand what contributes to our memory footprint and is it possible to do any better without completely abandoning .NET and wpf. We are interested in improving both Total Size and the Private Working Set (pws). In this question I just want to look at pws. VMMap typically reports a pws of 105 mb. Of this 11mb is image, 31mb is heap, 52 mb is managed heap, 7 mb is private data and the

heap management

由 萝らか妹 提交于 2020-02-03 08:46:54
问题 I know there is a meta-data which stores auxiliary information which is used during free() , realloc() when we supply only the pointer. I have few doubts about heap. Stack is allocated per-process. There is no doubt in that, but not sure about heap. Whether a heap information is globally maintained else per-process there will be some mechanism which holds info about allocated memory for that particular process. How heap information will be maintained? I guess hashing mechanism. I googled and

heap management

由 你说的曾经没有我的故事 提交于 2020-02-03 08:45:27
问题 I know there is a meta-data which stores auxiliary information which is used during free() , realloc() when we supply only the pointer. I have few doubts about heap. Stack is allocated per-process. There is no doubt in that, but not sure about heap. Whether a heap information is globally maintained else per-process there will be some mechanism which holds info about allocated memory for that particular process. How heap information will be maintained? I guess hashing mechanism. I googled and
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