memory

Decrease memory consumption when encrypting files c#

由 蹲街弑〆低调 提交于 2020-01-16 04:29:07
问题 My encryption app is using to much memory and it simply can't handle large files, how can I optimize my code for handling large files? I am using the code below to convert the file to base64 (increasing the file size dramatically) Console.Write("Enter File Path: "); docPath = Console.ReadLine(); extension = docPath.Substring(docPath.IndexOf(".")).Trim(); byte[] binarydata = File.ReadAllBytes(docPath); text = System.Convert.ToBase64String(binarydata, 0, binarydata.Length); var Encrypted =

Posting file on Background Agent / HttpWebRequest stream buffer keeps growing?

由 陌路散爱 提交于 2020-01-16 04:27:06
问题 I need to POST a 5MB file from within a ResourceIntensiveTask, where the OS sets a max memory usage of 5MB. So trying to stream the file directly from storage, but the Stream associated to the HttpWebRequest keeps growing in size. This is the code: public void writeStream(Stream writer, string filesource, string filename) { var store = System.IO.IsolatedStorage.IsolatedStorageFile.GetUserStoreForApplication(); var f = store.OpenFile(filesource, FileMode.Open, FileAccess.Read); store.Dispose()

SAP ABAP 程序之间的调用

由 北城以北 提交于 2020-01-16 03:15:21
更多内容关注公众号：SAP Technical 各位可以关注我的公众号：SAP Technical 一，同步调用从一个程序同步调用其他的ABAP程序，有2种方式： 1，调用程序被打断，当被调用程序执行完毕之后，调用程序继续执行。如：CALL FUNCTION <function>SUBMIT <program> AND RETURNCALL TRANSACTION <tcode> 使用CALL FUNCTION 'AAA'调用FM的时候，相应的FUNCTION GROUP被加载到调用程序所在的internal session。当FM执行完毕，接着执行调用程序。FUNCTION GROUP和其GLOBAL DATA会一直保存在这个internal session直到调用程序结束。当调用程序再次调用这个FM的时候，不会再次加载相应的FUNCTION GROUP。这个FUNCTON GROUP的GLOBAL DATA和第一次调用它时的内容是一样的。 使用SUBMIT <program> AND RETURN或者CALL TRANSACTION <tcode>的时候，实际是插入了一个新的internal session，当被调用的程序执行完毕之后，新插入的internal session会被删除，继续执行调用程序。可以使用leave program语句来结束程序。 2,调用程序被结束

redis持久化和常见故障

由 陌路散爱 提交于 2020-01-16 02:07:39
https://segmentfault.com/a/1190000004135982 redis 主从复制 Redis主从复制的原理 当建立主从关系时，slave配置slaveof <master_host> <master_port> 。slave服务器会向主服务器发送一个sync命令。master接受并fork一个进程来执行BGSAVE命令。该命令生成一个RDB文件并且全量发送给slave服务器，slave服务器接收并载入RDB文件，同时，主服务器将缓冲区的命令以增量的方式发送给从服务器，最终使从服务器的数据状态和主服务器保持一致。 RDB的工作原理 当redis生成dump.rdb文件时，工作过程如下 redis主进程fork一个子进程 fork出来的子进程将内存的数据集dump到临时的RDB中 当子进程对临时的RDB文件写入完毕，redis用新的RDB文件代替旧的RDB文件 AOF的工作原理 AOF ：append only file。每当Redis执行一个改变数据集的命令时，这个命令都会被追加到AOF文件的末尾。当redis重新启动时，程序可以通过AOF文件恢复数据 持久化文件监控 Redis 监控最直接的方法当然就是使用系统提供的 info 命令来做了，只需要执行下面一条命令，就能获得 Redis 系统的状态报告。 redis-cli info RDB文件状态监控

vba Function Returned value after call

由 半城伤御伤魂 提交于 2020-01-16 01:12:09
问题 I have in one module a sub that calls a function in another module and that function is publicly defined, after calling the function i store its returned value into a variable. my question is : does the function retain its value in memory after being called by that sub? if so i want to clean it from the memory based on its type (example: set myFunct = nothing ) if it returns an object. 回答1: VBA implements Reference counting to clean the memory using a "Garbage Collector" When you call a

In Windbg how to get the whole content from !do Command

由 ≡放荡痞女 提交于 2020-01-16 00:36:10
问题 I'm currently working in a memory issue on a .NET application, I'm debugging the Issue using Windbg I have come across to what the memory issue is, but during the investigation !do command is getting me the object which has a content that is excessive large BUT the Content that gets displayed by the command is truncated, Is there a way that I can get the Content in its entirely from the !do command? The result of the command looks something like this: 0:000> !do [Address] Name: System.Byte[]

Object sent - autorelease too many times, getting this leak for my iPhone app?

由 匆匆过客 提交于 2020-01-15 14:24:22
问题 I am getting too many Object sent - autorelease too many times, this memory leak for my iPhone app and dont know how to resolve it http://screencast.com/t/fPzMNewvq Above is screen shot for the same. SAAdvertiseCell has lot of objects which are releasing, so how is it possible to find where the exact problem is? Thanks 回答1: At first why don't you reuse cells? - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { Cell* cell = [tableView

Converting binary array to decimal string strange behaviour

由 青春壹個敷衍的年華 提交于 2020-01-15 12:47:10
问题 I'm currently implement left shift using int[] arrays in php and need to get back the decimal after operation. So I have written the following snippet to attempt conversion of binary array to decimal. function bin2dec($bin) { $length = count($bin) - 1; $sum = 0; //convert using doubling for($i = 0; $i < $length; $i++) { //use string_add if doubling bigger than int32 if($i >= 16) { $double = $this->string_add("$sum", "$sum"); $cr = $bin[$i]; if($cr == 0) { $sum = $this->string_add($sum,

Linux c application memory usage

由 半城伤御伤魂 提交于 2020-01-15 10:52:25
问题 I have C Linux application which continuously allocates and frees memory (around 200 alloc/free per sec) using malloc, calloc, realloc & free functions. Even though all allocated memory are freed (verified by wrapping *alloc and free), the VmSize, VmRSS & VmData numbers are keep on increasing and finally application is getting killed by OOM killer. Why the VmSize, VmRSS & VmData are keep on increasing? if it is Memory management issue, any pointers to avoid this? I saw this Problem usage

How to detect memory leak when memory allocation number isn't always same?

由 孤人 提交于 2020-01-15 09:52:48
问题 I got a memory leak (55 bytes) on my program like this. I am using C++, MFC, Visual Studio 2010. Detected memory leaks! {13497} normal block at 0x0E44C248, 55 bytes long. Data: 44 3A 5C 46 44 41 53.... the problem is, the memory allocation number "13497" is not always same. it's always different number if I run the program again. I wanted to find where I didn't release the memory before the exit, with _crtBreakAlloc, but it seems not possible to break on a memory allocation number. I used
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