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I. Challenges posed by large-scale concurrencyIn the past work, I have been faced with 5w per second high concurrent kill function, in this process, the entire web system encountered a lot of problems and challenges. If the web system does not do a targeted optimization, it will easily fall into an abnormal state. We are now going to discuss the ideas and methods of optimization, Ha.1. Reasonable design of the request interfaceA second

Code (Reprinted) Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Add to favorites the original oracle deadlock killing Process First, check which tables are locked. Select B. owner, B. object_name, a. session_id, a. locked_mode From v $ locked_object a, dba_objects B Where B. object_id = a. object_id; OWNER OBJECT_NAME SESSION_ID LOCKED_MODE --------------------------------------------------------------------------- WSSB SBDA_PSHPFTDT 22 3 W

The 1th chapter of the course introductionThe second kill system is often used in various websites and applications. This course begins with basic system design and foundational functions to teach you to design and implement a second-kill system using PHP, and to provide more advanced technical solutions and implementations for massive concurrency. 2nd Chapter System Technology Selection AnalysisThis chapte

The safest way to kill a process is simply to use the KILL command. First use the PS-EF command to determine the PID to kill the process, and then enter the following command: # Kill-pid Note: The standard KILL command usually achieves the purpose. Terminate the problemat

The 1th Chapter curriculum Introduction and the project frame construction Technology Selection Thinking analysis, based on MAVEN Spring-boot Engineering framework, integrated THYMELEAF, integrated MyBatis, installation of Redis, integrated Redis and so on. The 2nd Chapter realizes the user login and the distributed session function Realize user login function, realize password two times MD5 warehousing and distributed session. A familiar with the Springboot development model and the selection o

The safest way to kill a process is simply to use the KILL command. First use the PS-EF command to determine the PID to kill the process, and then enter the following command:# Kill-pidNote: The standard KILL command usually achieves the purpose. Terminate the problematic p

General: First, using PS to view the process, the method is as follows: $ ps-ef......smx 1822 1 0 11:38? 00:00:49 Gnome-terminalsmx 1823 1822 0 11:38? 00:00:00 Gnome-pty-helpersmx 1824 1822 0 11:38 pts/0 00:00:02 bashsmx 1827 1 4 11:38? 00:26:28/usr/lib/firefox-3.6.18/firefox-binsmx 1857 1822 0 11:38 pts/1 00:00:00 bashsmx 1880 1619 0 11:38? 00:00:00 Update-notifier......smx 11946 1824 0 21:41 pts/0 00:00:00 ps-ef or: $ ps-aux......smx 1822 0.1 0.8 58484 18152? NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;N

General article: First, look at the process with PS by using the following methods: Copy Code code as follows: $ ps-ef $ ps-ef ......Smx 1822 1 0 11:38? 00:00:49 gnome-terminalSmx 1823 1822 0 11:38? 00:00:00 Gnome-pty-helperSmx 1824 1822 0 11:38 pts/0 00:00:02 bashSmx 1827 1 4 11:38? 00:26:28/usr/lib/firefox-3.6.18/firefox-binSmx 1857 1822 0 11:38 pts/1 00:00:00 bashSmx 1880 1619 0 11:38? 00:00:00 Update-notifier......Smx 11946 1824 0 21:41 pts/0 00:00:00 ps-ef Or: Cop

I. Challenges posed by large-scale concurrencyIn the past work, I have been faced with 5w per second high concurrent kill function, in this process, the entire web system encountered a lot of problems and challenges. If the web system does not do a targeted optimization, it will easily fall into an abnormal state. We are now going to discuss the ideas and methods of optimization, ha.1. Reasonable design of the request interfaceA second

How to kill a process in Linux-general Linux technology-Linux programming and kernel information. For details, refer to the following section. The safest way to kill a process is to simply use the kill command without a modifier or a flag. First, use the ps-ef command to determine the PID of the process to be killed, and then enter the following command: #

The safest way to kill a processThe kill command is used without a modifier or a flag. First, use the PS-Ef command to determine the PID of the process to be killed, and then enter the following command: # Kill-PID Note: Standard kill commands can achieve the goal. Terminate the problematic process and release t

The 1th Chapter curriculum introduction and the project frame constructionTechnology selection Thinking analysis, based on MAVEN Spring-boot Engineering framework, integrated THYMELEAF, integrated MyBatis, installation of Redis, integrated Redis and so on.The 2nd chapter realizes the user login and the distributed session functionRealize user login function, realize password two times MD5 warehousing and distributed session. A familiar with the Springboot development model and the selection of t

Today encountered a problem, there is a table can not operate, it is likely to be locked, the first thought is kill session, so executed the following script to find out which session has a problem: To see if a table is locked SELECT/*+ rule*/ a.sid, B.owner, object_name, object_type from v$lock A, all_objects b WHERE type = ' TM ' and a.id1 = b.object_id; According to the SID queried above, find the corresponding serial#:SELECT sid,seri

1. High Concurrency Optimization analysis about concurrency Concurrency does not go because when multiple threads access a row of data at the same time, a transaction is generated so that a write lock is generated, and every time a thread that acquires a transaction releases the lock, another queuing thread gets the write lock, and QPS (query per second) and transaction execution times are closely related. The shorter the transaction execution time, the higher the concurrency, which is why the

The infinite hero kill respects and protects the use of all user privacy services. In order to provide you with more accurate and user-friendly services, we will use and disclose your personal information in accordance with this Privacy Policy. But the infinite hero kill will be a highly diligent and prudent obligation to deal with this information. Unless otherwise specified in this Privacy Policy, without

The kill table session in the lock_rac environment appears in the killed status (solved), _ rackilled Original works, from "Deep Blue blog" blog, deep blue blog: http://blog.csdn.net/huangyanlong/article/details/46876961 Killed state processing occurs in the session of the rac production database kill the lock table Environment: Operating System: CentOS 6.4 64BIT Database: Oracle RAC 11.2.0.4 R2 64bit In

The following content is reproduced from http:// OS .51cto.com/art/200910/158639.htm 1. KillPurpose: kill a process based on the process number.Usage: Kill [signal code] process IDExample:[Root @ localhost ~] # Ps auxf | grep httpdNote: Kill-9 to force termination and exitExample [root @ localhost ~] # Ps aux | grep GaimOr [root @ localhost ~] # Pgrep-l Gaim 5031

Original address: http://www.infoq.com/cn/articles/flash-deal-architecture-optimization/First, second kill business why difficult to doIm system, such as QQ or Weibo, everyone reads their own data (Friends List, group list, personal information).Microblogging system, everyone reads the data of people you care about, one person reads more personal data.Seconds to kill the system, only one copy of the invento

How to quickly kill database processes that occupy too many resources (CPU and memory. In many cases, exceptions or program errors may cause individual processes to occupy a large amount of system resources. to end these processes, run the following command to Kill the process: altersystemkillsession often causes individual processes to occupy a large amount of system resources due to exceptions or program

The safest way to kill a process is to simply use the kill command without a modifier or a flag. First, use the ps-ef command to determine the PID of the process to be killed, and then enter the following command: # Kill-pid Note: Standard kill commands can achieve the goal. Terminate the problematic process and rel