I am afraid that the C language memory topic will be useless, so this article is just a discussion.There are some differences between different platforms regarding memory issues. The platform mentioned in this article is x86 Linux platformUsing C
Keywords: sizeof
1. What is sizeof
First, let's take a look at the definition of sizeof on msdn:
The sizeof keyword gives the amount of storage, in bytes, associated with a variable or a type (including aggregate types). This keyword returns a value
I believe that most programmers have used struct and consortium. Today I will briefly talk about struct and consortium.
-- Definition of struct and Consortium
Struct: struct is a collection of data of the same type or different types. It is also
Talk about the box model and the box model from a foreign language
Talk about the box model from a foreign language
Statement: As an old cainiao who is involved in the front-end, there will certainly be some deviations in understanding the
1. Calculation of the table's occupied space
Select S. SEGMENT_NAME, DECODE (SUM (BYTES), NULL, 0, SUM (BYTES)/1024/1024) Mbytes
From DBA_SEGMENTS S
Where S. SEGMENT_NAME = 'mtl _ MATERIAL_TRANSACTIONS '-- table name
And S. SEGMENT_TYPE =
Learn frequently-used Mac commands, assist iOS development, and frequently-used mac commands for ios
Source: Jack_lin (@ Jack_Lin_IOS)
Heavy technology Preface
In the process of iOS development, you pay more attention to the efficiency of iOS
Since the level of developers is high and low, dba has limited energy, and it is impossible to solve the SQL statement problem in time! We plan to solve the slow database operation problem by imitating the methods of redo logs!
1. View
Oracle Rac 11.2.0.3 migrate OCR and VOTEDISK, 11.2.0.3votediskEnvironment: AIX7.1 + Oracle Rac 11.2.0.3Migration Description: When Oracle Rac is installed today, the GB Data disk is incorrectly used as OCRDG. Therefore, it will be troublesome to
How to solve the problem of "insufficient disk space" in Linux
Obviously there is a lot of space available, but the Linux system still prompts that there is no space available. Why? Occasionally, some frustrating and fuzzy error messages appear in
Mac basic commands Daquan basic commands 1. list file ls parameter directory name example: see what is in the driver Directory: ls/System/Library/Extensions parameter-w display Chinese, -l detailed information,-a includes hidden files 2. Conversion
Several Classes related to System File Processing in. Net are:
File, Directory, FileInfo, DirectoryInfo, DriveInfo, FileSystemWatcher. This article describes the usage of these classes.
1. The File class provides static methods for creating, moving,
FSO is as exciting and fascinating as UFOs. Of course, more is also a matter of joy and sorrow. June does not see a space service provider's advertisement: MB space is only 60 RMB/year, supports database, what is supported ...... FSO is not
Document directory
1.1.1 W
1.1.2 who
1.1.3 Whodo
1.1.4 LOGNAME
1.1.5 whoami
1.1.6 whereis
1.1.7 which
1.1.8 date
1.1.9 Cal
1.1.10 time
1.1.11 ID
1.1.12 hostid
1.1.13 hostname
1.1.14 DF
1.1.15 du
1.1.16 stty
1.1.17 tty
1.1.18
After a long period of development in Linux, many users are familiar with Linux, and we often encounter some problems, such as the high risk of the disappearance of Linux platform space, how can we solve the problem of the disappearance of Linux
Collective Smart Programming-Decision Tree Modeling (bottom) and collective smart Modeling
1. display of decision trees:
We have obtained a decision tree. We may need to browse the data in the next step. The following function is a method for
About Swap partition during Linux Installation
Swap partition, that is, Swap zone. The role of Swap space can be simply described as: when the physical memory of the system is insufficient, a part of the physical memory needs to be released, for
Linux Kernel -- load executable binary files 1. copy_strings, notepad binary copy
The last core module exec is analyzed from now on. c. After analyzing this file, it will form a loop with all the previous analyses, from Process Creation, process
Analyze in detail why the statistical results of du and df are different. dudf statistics are different.
Today, I am asked why the statistical results of du and df are different. I gave him some explanation, and then I thought about writing an
About two months ago, the MGDN Forum was suddenly inaccessible for unknown reasons. After investigation, the original server was closed for Record Filing and cannot continue to provide services. During this period, I have been seeking for server
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