守护进程(Daemon)是运行在后台的一种特殊进程.它独立于控制终端并且周期性地执行某种任务或等待处理某些发生的事件.守护进程是一种很有用的进程.Linux的大多数服务器就是用守护进程实现的.同时,守护进程完成许多系统任务. Linux下的常驻进程的作用不可忽略,但这里面的问题也不能忽略,怎么启动进程,怎么结束进程,怎么在进程挂掉之后重启进程都要设计的合理.下面看一个shell控制的php常驻进程的例子. 不废话,直接捞干货,上代码,通过代码来讲解更容易理解: #!/bin/sh #filena
R1---(R2---R3---R4)--R5 |__EBGP__|_____IBGP______|__EBGP_| 12.0/24 23.0/24 34.0/24 45.0/24 R2-R 4是MPLs和MPLS-VPN域 R2和R4上的vrf: ip vrf vpn1 rd 100:1 route-target export 100:1 route-target import 100:1 r4#sh ip vrf d VRF vpn1; default RD 100:1; default V
这篇文章主要介绍了Shell脚本实现查杀子进程.僵尸进程,本文直接给出实现代码,实现递归找到导致进程僵死的最底层子进程并杀除,需要的朋友可以参考下 核心服务器上跑了一堆的脚本.程序,难免有时候会出现僵尸进程,死不死活不活的在那里占用资源,最初只是写了个根据关键字查杀进程的linux shell脚本,后来发现很多时候进程死在那里的时候其实是内部调用子进程的时候出现了问题,这时候光杀父进程根本没解决根本问题.比如说rsync的时候通过ssh来连接,rsync本身没问题,但可能ssh死掉了.因此重新写
这篇文章主要为大家分享一个监控linux进程的shell脚本,当程序异常退出时可以自动重启,涉及到捕获进程信号与重启进程的命令与知识 为确保php页面在后台运行,写了一个监控脚本,假设程序异常退出,那么可以自动重启. shell脚本/usr/local/scripts/receve.sh内容: #!/bin/bash #funtion:keep receve.php running PHP=&/usr/local/php5/bin/php& PROGRAM=&receve.p
在公司的Erlang团队中,我们采用rebar来管理依赖.构建.自动化测试.部署和升级.前面的 几个话题网上已经能搜到不少介绍的文章,这里就不做赘述了.本文主要集中介绍我们采用 rebar进行产品热更的实践,当然,如果你有更好.更方便的方法,欢迎交流. 目标 先来介绍目标, 假设第一个release版本为'1.0.0.0', 我需要这样的一个工具,它可以简单地执 行upgrade.sh -n upgrade_demo -v 1.0.0.1就将产品热更到新的版本. 问题 从rebar的wiki中我
配置文件 cat& file.config write your config here EOF Here Documents的一般形式如下: 0001 commands & 0002 here documents ....... ...... 000n ID&\n& 在上面这个语法描述中,0001行的commands是任何SHELL命令.ID是一个字符串标识,标志着嵌入文档的开始(习惯上,常用的标识是EOF,等等).从0002行可以写任何文本,这里写入的内容都将作为标准输入传送给
Today in the installation linux, when the sake of expedience, the direct use Dreamweaver to edit the configuration file, the results have been reported this error. To open in vi-b parameters found with the text at the end of each period of time will
In the implementation of the. / Startup.sh, or. / Shutdown.sh time, broke a Permission denied, Mainly do not have permission to switch to tomcat6/bin directory will catalina.sh Add executable permissions chmod a + x catalina.sh can increase the appro
Always wanted to analyze the entire build system andoid, suffer from another rookie a little time, only ants like a little school, a little to do ..... The so-called analysis, it is of the structure to be true, but because of these and other reasons,
Example One: ifdef ERROR_001 $ (Error error is $ (ERROR_001)) endif Example two: ERR = $ (error found an error!) . PHONY: err err:; $ (ERR) One example is defined in the variable ERROR_001 error generated when the call after the execution, while the
#!/bin/sh ######################################################################### # # File: check_traffic.sh # Description: Nagios check plugins to check network interface traffic in *nix. # Language: GNU Bourne-Again SHell # Version: 1.1.6 # Date:
scan-bugzilla-user.sh #! /bin/sh #export LC_ALL=zh_CN.GB18030 export LC_ALL=zh_CN.UTF-8 cd /bin2/ sh scan-bugzilla-user-daily.sh & scan-bugzilla-user-daily.sh.log 2&&1 /usr/bin/mutt -s &scan-bugzilla-user-daily& scm-svr-mtr@scm5.***.cn
执行脚本出现/bin/sh^M: bad interpreter: No such file or directory 这种情况应该有两种原因 1.在WIN底下用文本编辑工具修改过参数变量,在保存的时候没注意编码格式造成的, 2.也有可能是在VIM里修改,第一行末尾按到ctrl_v 错误原因之一很有可能是你的脚本文件是DOS格式的, 即每一行的行尾以\r\n来标识, 其ASCII码分别是0x0D, 0x0A. 可以有很多种办法看这个文件是DOS格式的还是UNIX格式的, 还是MAC格式的 (1)
Chapter V Extjs how to achieve &T&-type system page layout (Getting Started tutorial) Look at this chapter, you'll need to take a look EXT borderLayout diagram (useful for beginners) This over the article. Since the achievement of this tradition
1 - Overview Script catalina.sh for startup and shutdown tomcat Server, is the most critical of script Another script startup.sh and shutdown.sh Use a different parameter called the script The scripts are used as follows ( Quotations from the script
Executed in Linux. Sh script, reported abnormal / bin / sh ^ M: bad interpreter: No such file or directory. Analysis: This is caused by different systems and encoding format: edited in windows system. Sh files may have no visible characters, so the i
# / Bin / sh error & ./VBoxLinuxAdditions-x86.run bash: ./VBoxLinuxAdditions-x86.run: / bin / sh: bad interpreter: Permission denied & Sh ./VBoxLinuxAdditions-x86.run # Success However, after successful installation, virtualbox on debian support is
In Linux systems, although there are a variety of graphical interface tools, but the sell is still a very flexible tool. Shell is not just an order of the collection, and is a great programming language. You can use the shell to make a lot of task au
Baidu fat teacher right before an element V in the Philosophy of Baosteel Xu Jun Zhang kidnapping and murder of a teacher is to kind fat iron-murdered /f?kz= /pangls/article/3572421.html http://bbs.
V $ SQL lists the shared SQL areas of all statements of the information, it does not contain the words GROUP BY, and for each SQL statement in
V $ SQLAREA in a record of a shared SQL area of statistical information. It provides
Question: [Root @ Oracle test] #. / Cutfile.sh test 4 -Bash:. / Cutfile.sh: Permission denied Address: linux executed. sh files are always prompt permission denied error. If you are a direct root login, then run: chmod 777 *. sh can. Mainly not execu
Write a simple sh script. Put linux to perform the following, always the last line of the error report: . / Cutfile.sh: line 19: syntax error near unexpected token `done ' . / Cutfile.sh: line 19: `done ' Very depressed. . . Finally, she found the pr
Installed in ubuntu, vim-gnome, but from the habit of windows, no Ctrl + C / Ctrl + V sense operation is very inconvenient. the next google, found the solution: In the ~ /. Vimrc (if the file does not exist, the new) to add the following two lines of
Original Address: http://www.grid.net.ru/nginx/mogilefs.en.html (the wall) Nginx mogilefs module (v 1.0.3) RUS ENG MogileFS client for nginx Web Server. Description The module queries MogileFS Tracker specified by mogilefs_tracker Directive and uses
Shanghai Jiading how much electricity transmission line voltage V? Transmission line is in the city. Unity of residential electricity voltage 220V; Jiading power transmission lines in the city generally 10KV, tripod outside the city the kind of trans
Existing server.bat, server.sh, and the folder with the directory lib in the number of jar files Because often do not remember to write bat or sh file to run java program, this feature in order to check in here .... server.bat @echo off REM SET UP CL
Permissions on the LINUX-bash:. / Startup.sh: Permission denied &script type=&text/javascript&& &/ script& &script type=&text/javascript&& &/ script& In the implementation of the. / Startup.sh, or. / Shutdown.sh
Several common data dictionary: user_objects: records all user objects, including tables, indexes, procedures, views and other information, as well as creation time, the effectiveness of such state information, non-DBA users to home base. Would like
I am Ubuntu9.10 + win7 dual system, as used in 9.10 is grub2.0, fix up compared to the first edition to trouble many. First of all, using the installation CD Ubuntu9.10 repair, after starting to use CD-ROM, select the first &try ubuntu without any ch
4W6Y/SG24N9K4/V Rexroth 4WE6D6X/OFAG24N9K4 + Z5L 4W6Y/SG24N9K4/V Rexroth 4WE6D6X/OFAG24N9K4 + Z5L 4WE6D6X/OFAG24N9K4 + Z5L 4W6Y/SG24N9K4/V DRC3U-D5-53/315Y6EG24N9DK25L 3SEW-6C36-420MG24N9K4 / V 3SEW-6C-3X/420MG24-N9-Z5L Wuhan Cheng Chen Automatic Con
I am Ubuntu9.10 + win7 dual system, as used in 9.10 is grub2.0, fix up compared to the first edition to trouble many. First of all, using the installation CD Ubuntu9.10 repair, after starting to use CD-ROM, select the first &try ubuntu without any ch
/taotaoblog/archive//1569958.html /% CE% D2% D7% D4% CE% DE% BB% DA/blog/item/5ba64f90a68dab8aa877a45a.html 1, inheritance, and to achieve distinction Dictionary Hashtable class is based on the old c
Through v $ sqlarea, v $ sql query queries the most resource- ----------------------- v $ sqlarea, v $ sql ----------------------- Query from V $ SQLAREA the most resource-intensive queries select b.username username, a.disk_reads reads, a.executions
android.util.Log commonly used method has the following five: Log.v () Log.d () Log.i () Log.w () and Log.e (). According to the first letter corresponding to VERBOSE, DEBUG, INFO, WARN, ERROR. 1, Log.v debugging is black, and any information will be
Very good script with a mysql database optimization, relative mysqltuner.pl, tunning-primer.sh a bash script to be more than mysqltuner.pl, precisely, is from a different aspect of the state evaluation of the mysql tuner-primer.sh Optimization a good
java script call to bat batch and sh
V $ MYSTAT This view contains statistics on the current session. Column Datatype Description SID NUMBER ID of the current session STATISTIC# NUMBER Number of the statistic VALUE NUMBER Value of the statistic V $ SESSION Query related to a variety of
select sid, paddr, user #, username, serial # from v $ sid: sid process paddr: user #: Users username: user name serial: serial number
v $ sql in executions to calculated how long? Such as title, number of executions (executions) is launched from the database after the start, or just the last few hours the number of times? To clear the v $ sql inside information over again it? http:
By looking at v $ librarycache view, you can monitor the activities of the library cache to further measure the share pool settings are reasonable. One RELOADS out that the number of times the object is re-loaded, set in a reasonable system, this val
V $ SYSSTAT contains multiple statistical items, this section presents some key statistics v $ sysstat items useful in the tuning area. Has the following in alphabetical order: State of the database using some of the key indicators: l CPU used by thi
V $ SQLAREA This view continued to keep track of all shared pool in the shared cursor, in the shared pool in each corresponds to a SQL statement. This view of SQL statements in the use of resources is very important. V $ SQLAREA the information in th
To learn how to get sql generated redo information, check online to take the results obtained on the v $ mystat, v $ sesstat, v $ statname view to operate, now learned to write as follows: 1.v $ mystat, v $ sesstat is used to separately record the se
Baidu Search Engine Optimization Guide v.10 released, PDF download please go here: Baidu Search Engine Optimization Guide v.10
There are two environment variables - CATALINA_OPTS and JAVA_OPTS - which are both used in the catalina.sh startup and shutdown script for Tomcat. They are described in comments within that file as: (Optional) Java runtime options used when the &star
Check each application server oracle database session occupation situation select machine, count (*) c from v $ session group by mac Check the machine under the machine name given to all sessions select t.STATE, t. * from v $ ses
run under linux. sh files are always prompt permission denied If you login, then root chmod 777 *. sh
(1)-V $ SESSION_WAIT This is a view of finding the key performance bottleneck. It provides session in any case, waiting for what is currently in the database (if the current session is doing nothing, waiting for the show that it is the last event.) W
Chapter XII: backup and recovery 1. V $ sga, v $ instance, v $ process, v $ bgprocess, v $ database, v $ datafile, v $ sgastat 2. Rman need set dbwr_io_slaves or backup_tape_io_slaves and large_pool_size 3. Monitoring parallel rollback & V $ fast_sta
1, v $ statname: statistic # number statistics name the name of the table shows statistics for all statistics, the statistics a total of 347 entries oracle 10g statistics items 2, v $ mystat: The current session statistics, shows the v $ statname ite
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processed in 0.057 (s). 9 q(s)守护进程(Daemon)是运行在后台的一种特殊进程.它独立于控制终端并且周期性地执行某种任务或等待处理某些发生的事件.守护进程是一种很有用的进程.Linux的大多数服务器就是用守护进程实现的.同时,守护进程完成许多系统任务. Linux下的常驻进程的作用不可忽略,但这里面的问题也不能忽略,怎么启动进程,怎么结束进程,怎么在进程挂掉之后重启进程都要设计的合理.下面看一个shell控制的php常驻进程的例子. 不废话,直接捞干货,上代码,通过代码来讲解更容易理解: #!/bin/sh #filena
R1---(R2---R3---R4)--R5 |__EBGP__|_____IBGP______|__EBGP_| 12.0/24 23.0/24 34.0/24 45.0/24 R2-R 4是MPLs和MPLS-VPN域 R2和R4上的vrf: ip vrf vpn1 rd 100:1 route-target export 100:1 route-target import 100:1 r4#sh ip vrf d VRF vpn1; default RD 100:1; default V
这篇文章主要介绍了Shell脚本实现查杀子进程.僵尸进程,本文直接给出实现代码,实现递归找到导致进程僵死的最底层子进程并杀除,需要的朋友可以参考下 核心服务器上跑了一堆的脚本.程序,难免有时候会出现僵尸进程,死不死活不活的在那里占用资源,最初只是写了个根据关键字查杀进程的linux shell脚本,后来发现很多时候进程死在那里的时候其实是内部调用子进程的时候出现了问题,这时候光杀父进程根本没解决根本问题.比如说rsync的时候通过ssh来连接,rsync本身没问题,但可能ssh死掉了.因此重新写
这篇文章主要为大家分享一个监控linux进程的shell脚本,当程序异常退出时可以自动重启,涉及到捕获进程信号与重启进程的命令与知识 为确保php页面在后台运行,写了一个监控脚本,假设程序异常退出,那么可以自动重启. shell脚本/usr/local/scripts/receve.sh内容: #!/bin/bash #funtion:keep receve.php running PHP=&/usr/local/php5/bin/php& PROGRAM=&receve.p
在公司的Erlang团队中,我们采用rebar来管理依赖.构建.自动化测试.部署和升级.前面的 几个话题网上已经能搜到不少介绍的文章,这里就不做赘述了.本文主要集中介绍我们采用 rebar进行产品热更的实践,当然,如果你有更好.更方便的方法,欢迎交流. 目标 先来介绍目标, 假设第一个release版本为'1.0.0.0', 我需要这样的一个工具,它可以简单地执 行upgrade.sh -n upgrade_demo -v 1.0.0.1就将产品热更到新的版本. 问题 从rebar的wiki中我
配置文件 cat& file.config write your config here EOF Here Documents的一般形式如下: 0001 commands & 0002 here documents ....... ...... 000n ID&\n& 在上面这个语法描述中,0001行的commands是任何SHELL命令.ID是一个字符串标识,标志着嵌入文档的开始(习惯上,常用的标识是EOF,等等).从0002行可以写任何文本,这里写入的内容都将作为标准输入传送给
Analysis and Design of e-commerce sites Objectives identified in section I Site objectives: the development of e-commerce site means the location and description of the vision guiding the macro-based web site design 1. The purpose of the construction
Recent study Hadoop, facing the apache web site information Zhaomaohuahu. As the saying goes, better hand-eye over a thousand times over again, cogency, not hands really do not know have any problems. Step by step according to the document, in theory
ext.ux.util.clone = function (o) {if (! o | | 'object'! == typeof o) {} if ('function' === typeof o.clone) {return o. clone ();} var c = '[object array]' === object.prototype.tostring.call (o)? []: {}; var p, for (p in o) {if (o. hasownpr
&! - Head area code -& &head& &SCRIPT Language=JavaScript type=text/JavaScript& &! - / / More jav marqueesWidth = 610; preLeft = 0; currentLeft = 0; stopscroll = getlimit = 0; preTop = 0
Key knowledge points: js array, digital functions, string functions, form validation, hashMap, stack, date function, call function and so on. next: js regular expressions, closures, apply, callee, event-related functions, Cookie, etc. 1.javascript ar
We view the memory in Linux is generally free to use the command: [root@oracle ~]# free total [url][/url] used free shared buffers cached Mem:
0 8236 -/+ buffers/cache: 5064 Swap: 60 1968116 Here i
Perform free command displays the following: [Root @ Linux / tmp] # free total used free shared buffers cached Mem: 332 40 126384 - / + Buffers / cache:
265000 Mem: said physical memory statistics - /
Linux memory usage see the results of analysis of free Linux memory management, memory management with the windows actually have a very similar place, this is the concept of using virtual memory. In Linux we generally view the use of free memory [Roo
Part I: View the memory usage Under Linux using the Top [Root @ itc-test9 ~] # top top - 17:08:01 up 12 days, 3:48, 2 users, load average: 0.01, 0.01, 0.00 Tasks: 95 total, 1 running, 94 sleeping, 0 stopped, 0 zombie Cpu (s): 0.0% us, 0.0% sy, 0.0% n
Some time ago a project written in C, performance test and found memory leaks. Observations on how the use of memory, free is a good use of a command. bash-3.00 $ free total used free shared buffers cached Mem:
page 280: 11.4.3生成器 //该节没有怎么深入看懂,先留个坑 page 283: //强大的数组推导(array comprehension) function range(min, max) { for(let i = Math.ceil(min); i &= i++) } let evensquares = [x*x for (x in range(0,10)) if (x % 2 === 0)] // =& [0,4,16,36,64,100]
--------http://chinesefys./352 http://blog.chinaunix.net/uid--id-1886887.html #include &stdio.h& #include &string.h& /* * Here's something you've all been waiting for: the AT&T public domain * source for ge
Today in the installation linux, when the sake of expedience, the direct use Dreamweaver to edit the configuration file, the results have been reported this error. To open in vi-b parameters found with the text at the end of each period of time will
In the implementation of the. / Startup.sh, or. / Shutdown.sh time, broke a Permission denied, Mainly do not have permission to switch to tomcat6/bin directory will catalina.sh Add executable permissions chmod a + x catalina.sh can increase the appro
Always wanted to analyze the entire build system andoid, suffer from another rookie a little time, only ants like a little school, a little to do ..... The so-called analysis, it is of the structure to be true, but because of these and other reasons,
Example One: ifdef ERROR_001 $ (Error error is $ (ERROR_001)) endif Example two: ERR = $ (error found an error!) . PHONY: err err:; $ (ERR) One example is defined in the variable ERROR_001 error generated when the call after the execution, while the
#!/bin/sh ######################################################################### # # File: check_traffic.sh # Description: Nagios check plugins to check network interface traffic in *nix. # Language: GNU Bourne-Again SHell # Version: 1.1.6 # Date:
scan-bugzilla-user.sh #! /bin/sh #export LC_ALL=zh_CN.GB18030 export LC_ALL=zh_CN.UTF-8 cd /bin2/ sh scan-bugzilla-user-daily.sh & scan-bugzilla-user-daily.sh.log 2&&1 /usr/bin/mutt -s &scan-bugzilla-user-daily& scm-svr-mtr@scm5.***.cn
执行脚本出现/bin/sh^M: bad interpreter: No such file or directory 这种情况应该有两种原因 1.在WIN底下用文本编辑工具修改过参数变量,在保存的时候没注意编码格式造成的, 2.也有可能是在VIM里修改,第一行末尾按到ctrl_v 错误原因之一很有可能是你的脚本文件是DOS格式的, 即每一行的行尾以\r\n来标识, 其ASCII码分别是0x0D, 0x0A. 可以有很多种办法看这个文件是DOS格式的还是UNIX格式的, 还是MAC格式的 (1)
Chapter V Extjs how to achieve &T&-type system page layout (Getting Started tutorial) Look at this chapter, you'll need to take a look EXT borderLayout diagram (useful for beginners) This over the article. Since the achievement of this tradition
1 - Overview Script catalina.sh for startup and shutdown tomcat Server, is the most critical of script Another script startup.sh and shutdown.sh Use a different parameter called the script The scripts are used as follows ( Quotations from the script
Executed in Linux. Sh script, reported abnormal / bin / sh ^ M: bad interpreter: No such file or directory. Analysis: This is caused by different systems and encoding format: edited in windows system. Sh files may have no visible characters, so the i
# / Bin / sh error & ./VBoxLinuxAdditions-x86.run bash: ./VBoxLinuxAdditions-x86.run: / bin / sh: bad interpreter: Permission denied & Sh ./VBoxLinuxAdditions-x86.run # Success However, after successful installation, virtualbox on debian support is
In Linux systems, although there are a variety of graphical interface tools, but the sell is still a very flexible tool. Shell is not just an order of the collection, and is a great programming language. You can use the shell to make a lot of task au
Baidu fat teacher right before an element V in the Philosophy of Baosteel Xu Jun Zhang kidnapping and murder of a teacher is to kind fat iron-murdered /f?kz= /pangls/article/3572421.html http://bbs.
V $ SQL lists the shared SQL areas of all statements of the information, it does not contain the words GROUP BY, and for each SQL statement in
V $ SQLAREA in a record of a shared SQL area of statistical information. It provides
Question: [Root @ Oracle test] #. / Cutfile.sh test 4 -Bash:. / Cutfile.sh: Permission denied Address: linux executed. sh files are always prompt permission denied error. If you are a direct root login, then run: chmod 777 *. sh can. Mainly not execu
Write a simple sh script. Put linux to perform the following, always the last line of the error report: . / Cutfile.sh: line 19: syntax error near unexpected token `done ' . / Cutfile.sh: line 19: `done ' Very depressed. . . Finally, she found the pr
Installed in ubuntu, vim-gnome, but from the habit of windows, no Ctrl + C / Ctrl + V sense operation is very inconvenient. the next google, found the solution: In the ~ /. Vimrc (if the file does not exist, the new) to add the following two lines of
Original Address: http://www.grid.net.ru/nginx/mogilefs.en.html (the wall) Nginx mogilefs module (v 1.0.3) RUS ENG MogileFS client for nginx Web Server. Description The module queries MogileFS Tracker specified by mogilefs_tracker Directive and uses
Shanghai Jiading how much electricity transmission line voltage V? Transmission line is in the city. Unity of residential electricity voltage 220V; Jiading power transmission lines in the city generally 10KV, tripod outside the city the kind of trans
Existing server.bat, server.sh, and the folder with the directory lib in the number of jar files Because often do not remember to write bat or sh file to run java program, this feature in order to check in here .... server.bat @echo off REM SET UP CL
Permissions on the LINUX-bash:. / Startup.sh: Permission denied &script type=&text/javascript&& &/ script& &script type=&text/javascript&& &/ script& In the implementation of the. / Startup.sh, or. / Shutdown.sh
Several common data dictionary: user_objects: records all user objects, including tables, indexes, procedures, views and other information, as well as creation time, the effectiveness of such state information, non-DBA users to home base. Would like
I am Ubuntu9.10 + win7 dual system, as used in 9.10 is grub2.0, fix up compared to the first edition to trouble many. First of all, using the installation CD Ubuntu9.10 repair, after starting to use CD-ROM, select the first &try ubuntu without any ch
4W6Y/SG24N9K4/V Rexroth 4WE6D6X/OFAG24N9K4 + Z5L 4W6Y/SG24N9K4/V Rexroth 4WE6D6X/OFAG24N9K4 + Z5L 4WE6D6X/OFAG24N9K4 + Z5L 4W6Y/SG24N9K4/V DRC3U-D5-53/315Y6EG24N9DK25L 3SEW-6C36-420MG24N9K4 / V 3SEW-6C-3X/420MG24-N9-Z5L Wuhan Cheng Chen Automatic Con
I am Ubuntu9.10 + win7 dual system, as used in 9.10 is grub2.0, fix up compared to the first edition to trouble many. First of all, using the installation CD Ubuntu9.10 repair, after starting to use CD-ROM, select the first &try ubuntu without any ch
/taotaoblog/archive//1569958.html /% CE% D2% D7% D4% CE% DE% BB% DA/blog/item/5ba64f90a68dab8aa877a45a.html 1, inheritance, and to achieve distinction Dictionary Hashtable class is based on the old c
Through v $ sqlarea, v $ sql query queries the most resource- ----------------------- v $ sqlarea, v $ sql ----------------------- Query from V $ SQLAREA the most resource-intensive queries select b.username username, a.disk_reads reads, a.executions
android.util.Log commonly used method has the following five: Log.v () Log.d () Log.i () Log.w () and Log.e (). According to the first letter corresponding to VERBOSE, DEBUG, INFO, WARN, ERROR. 1, Log.v debugging is black, and any information will be
Very good script with a mysql database optimization, relative mysqltuner.pl, tunning-primer.sh a bash script to be more than mysqltuner.pl, precisely, is from a different aspect of the state evaluation of the mysql tuner-primer.sh Optimization a good
java script call to bat batch and sh
V $ MYSTAT This view contains statistics on the current session. Column Datatype Description SID NUMBER ID of the current session STATISTIC# NUMBER Number of the statistic VALUE NUMBER Value of the statistic V $ SESSION Query related to a variety of
select sid, paddr, user #, username, serial # from v $ sid: sid process paddr: user #: Users username: user name serial: serial number
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