! "/>Checkpoint EventCheckpoints are equivalent to backup points, and if this is more likely to recover faster when a problem occurs because there is no need to recover longer and more records, it is usually recorded every three secondsIf log changes are recordedor manually request a checkpoint.650) this.width=650; "height=" 186 "src=" http://b287.photo.store.qq.com/psb?/81c1194a-ff39-4e50-b1b1-40057b06260f/ dfeqhqhktxpwc1tfemyrl*z3wtpfffigx43yq*ywv8m
75G 75G 0 100%/With the above output as an example, the meaning of the expression is:The second hard drive interface (b), the second partition (2), the capacity is 75G, with 75G, usable is 0, so the utilization is 100%, is mounted to the root partition directory (/).The following is an explanation of the relevant commands:DF-HL Viewing disk space remainingDf-h viewing the partition size for each root pathDu-sh [directory Name] Returns the size of the directoryDU-SM [Folder] Returns the total nu
/var includes data to be changed while the system is running. This includes each system that is specific, that is, a directory that cannot be shared with other computers, such as/var/log,/var/lock,/var/run. Some directories can still be shared with other systems, such as/var/mail,/var/cache/man,/var/cache/fonts,/var/spool/news. The purpose of the Var directory is to extract files or temporary
1. Using Show Binlog EventsA. Getting a list of binlog files mysql> Show binary logs;+------------------+-----------+| Log_name | File_size |+------------------+-----------+| mysql-bin.000005 | 1288 | | mysql-bin.000006 | 120 | +------------------+-----------+mysql>b. View the Binlog file currently being written mysql> show Master status\g;********************** 1. Row ***************************
(progress):
Package org.apache.hadoop.util;Public interface Progressable {public void Progress ();}
In addition to creating a new file to write data to, we can also use the Append () method to add data to an existing file:Public Fsdataoutputstream append (Path f) throws IOExceptionWith this function, the application can write data to files that cannot be limited in size (such as logfile, you do not know in advance how much
manual: Git diff, git Add, git diff--cached command details
For a detailed explanation of git commit commands, please refer to the article: Git manual: Git commit-m/-am/-a-m submit files to local warehouse area
For a git fetch command, refer to the article: Git manual: Git fetch pulls the latest version of the branch and branch of the remote warehouse to the local
For more information about git pull command use, please refer to article: Git manual: G
Use logdump to view extract trail files (Getting Started)
Use the logdump tool:Displays and searches for information in the goldengate trail file.You can save part of the information in the goldengate trail file to a separate trail file.
1. Start the logdump ToolShell> logdump
2. Get helpLogdump 1> help
For more information, see Windows and Unix troubleshooting and Performance Tuning guide.
3. Open the trai
Tags: using/tmp Operation CTRL AC unit description default parameter cat命令行提示符[[emailprotected] ~]## 超级用户$ 普通用户当前所在目录 ~用户的家目录管理员超级用户 /root普通用户 /home/用户名/所在目录linux 命令格式命令 空格 [选项] 空格 [参数]选项,使用或调整命令的功能参数:参数四命令操作的对象,如果可以省略,说明有默认参数显示注意:在linux下是严格区分大小写,所有内容!命令全部小写Linux view and create directory files and other commands 1 ls//list Displays the contents of the directory 1.1 Ls-l//Long format display (the t
configuration fileThe application's configuration file can be Found in the. config of Ubuntu , primarily for settings in the Application Preferences menu, workspace configuration, and so on. 5. Web Browser DataWeb browser data files can also be found in the Ubuntu. config file, which is mostly cached, including bookmarks, browsing history, temporary storage of downloaded files or pictures in the Web bro
process is running;
The FD directory is a symbolic connection of the files that the process opened or used.
------------------------------------------------------------------
Cat/proc/xxxx/environ |grep PWD
View the absolute path of the command.
Because of problems such as backup, different versions, and so on, there are many Nginx directories on ECS Linux, and the configuration
■ How to view various database data files?
1) view data filesSQL> select file_name, Bytes/(1024*1024) M0 from dba_data_files;2) view the control fileSQL> select name, status from V $ controlfile;3) view log filesSQL> select g
This article will show you how to reference wxml files and view templates in small programs. you can reference WXML files in two ways to include duplicate content, this makes the webpage content and logic structure simpler, clearer, and more lightweight. This article will show you how to reference wxml files and
1, first open your already registered GitHub, log in later to jump to the following page, then select the file you want to view2, open the file, and then jump to the following interface, click on the interface settings3, then in the click Setting after the page appears down, pull to the following position click Choose a Theme button4, then go to the next page click on the Select Theme button5, then it will return to the previous page, and generate a
When you need to view the header or tail of a text file, the head command and tail command can easily complete this operation. The head command is used to view the beginning of a text file, while the tail command is used to display the last few lines of the text file. The two commands are as follows:Head example.txt displays the top 10 lines of example.txt;Head-N 20 example.txt displays the first 20 rows of
Tags: target blog get log self-learning Linux view command inux file Linux commandClick Back to learn the path of the Linux command line and shell script3.6-Files View command file cat more less tail headlsThe command is used to display a list of file directories, Windows similar to the commands under the system DOS di
Git: Configure identity and query, create a code repository, view files in the repository, and share commands. git Repository
1. Configure identity and query
Git config -- glocal user. name "me" git config -- glocal user. email "A@me.c"
2. Create a code repository
Cd aa/bb/
Git init
3. view files in the
Tags: Microsoft strip line break results screen problem logs cat contentMore commandsUsing the more command to display the more/var/log/boot.log-20171129 file, you can see that the system is displayed full screen when the pause, use a space to page, use the Q key to exit.SplitThe split command splits a large file into small files that sometimes need to be split into smaller pieces, such as for readability,
1. trace file introduction:
Trace file is a subsequent text file of TRC, which records various SQL operations and the time consumed, based on the trace file, we can understand which sqls lead to system performance bottlenecks and adopt appropriate methods for optimization.2. How to generate trace file:
1.First, use sqlplus to log on to Oracle.
Show parameter SQL _trace
Name type value
-------------------------------------------
SQL _trace Boolean fals
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