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write IO线程数（innodb 1.0x） purge thread ： 事务提交后，其所使用的undolog就不再需要，所以需要存储引擎负责回收并分配新undo页； innodb1.1x之前 purge动作在master thread中完成； 之后可以通过配置 innodb_purge_threads=1 开启独立的purge thread来处理，以减轻master thread负担，提高CPU使用率； page cleaner thread : innodb1.2x版本开始，将脏页刷新操作放在单独的page cleaner thread中，进一步减轻了master thread负担，并减轻用户查询线程的阻塞；Buffer pool缓冲池： 缓冲池本质上就是一块内存区域，通过内存的速度弥补磁盘速度较慢对数据库性能的影响；

. Generally, GtkOrphan is not pre-installed, so you need to manually install it through Synaptic or command line ). GtkOrphan is a graphic front-end of deborphan. It can scan and remove various isolated libraries in the system. Based on the degree of isolation, this tool can help the system save a lot of storage space. However, due to the dependency between libraries and applications, please be cautious when determining whether to delete them. 4: Cruft Cruft is a command line tool that can detec

Intel and cleaners A person without a job went to Intel to find a job as a cleaner. After the interview and implementation (scanning the toilet...), the personnel department told him to recordIf yes, ask him for an email address to send an admission notice and other documents. "I don't have a computer, let alone e-mail address," he said. "The personnel department told him:" For intel, a person without email does not exist.People, so intel is not ava

. They just cleaned a neighbor you don't know. So the answer is there, but how do you find that person? If you search for "Chongqing cleaner" in the search engine, what do you get? Nothing useful. Google returns about168,000Item, but it is useless for me! I don't need 168,000 results! I only need a useful result! Search engines use the information I provide to do their best. I am not complaining about Google-its algorithm is very powerful. It's just

need to manually install the work (through the synaptic or command line to complete). Gtkorphan belongs to the graphical front-end of Deborphan, capable of scanning and removing all kinds of isolated libraries in the system. Depending on the level of isolation, this tool can help the system save a lot of storage space. However, because of the dependencies between the library and the application, please be cautious when determining the deletion. 4:cruft Cruft is a command-line tool that detect

Cause of the error: Adobe's series of software stores registration information in some Sqlite3 database files, with repeated installation and uninstall of Adobe components, such as Photoshop, Premiere, Dreamweaver, after Effects, illustrator, and so on , there will be a lot of residue information, especially the green version of Adobe software, the newly installed version does not fully understand the information previously written to the database, resulting in the inability to reinstall the so

One, code implementation SingletonMacroDef.h #pragma once //Single example macro definition, header file declaration #define DECLARE_SHARE (ClassName) \ private:\ static classname* m_ spinstance;\ public:\ static classname* getinstance () \ {\ if (NULL = = m_spinstance) \ {\ m _spinstance = new ClassName (); \ static Cleaner s_clean;\ }\ return

. For example, killing the DB2SYSC process will cause the entire DB2 instance to stop running. This article is designed to help you understand processes rather than directly manipulate them. Why study the DB2 process. Our personal experience has shown that this knowledge is valuable, and the customers we visit are also seeking such information from us. Don't believe it yet. Take a look at the actual scenario below and see for yourself how to solve the problem by checking the DB2 process running

Failure phenomenon: Modern information society, more people choose to use the notebook computer office, entertainment, and we use the highest probability is the notebook keyboard, the keyboard into the dust accumulated more easily damage, affect our normal use, so the usual use of the keyboard after the dust can find ways to put the keyboard gaps in the dust clean off, Often clean and clean, you can maximize the extension of the service life of the keyboard. Solution: The keyboard is the easi

For anyone who wants to clean up my Mac reviews, this article will describe the features of Cleanmymac, the value and whether you should buy it. "Clean My Mac" is one of many Mac cleanup applications designed to clean up iOS systems, typically similar to the free Application C Cleaner for Windows computers. Clean my Mac from Macpaw free and paid version with lifetime license of $99.Cleanmymac Comment: Software and scams?Cleanmymac features include a v

Code and Demo: Source sources demonstration source? phprequi 9. Easy Online Voting system php--home get information Introduction:: This article mainly introduces the simple online voting system php--homepage to get information, for the PHP tutorial interested students can refer to. 10. Haier Water Filter Vacuum cleaner PHP Filter Implementation code Introduction: Haier Water Filter Vacuum cleaner: Haier wa

Registry Keys get removed. you do not need a license in order to download the program or run the installer, As you are only uninstalling the program. If you are uninstalling something other than workstation 5.x, 6. X., or 7.x, run the VMware registry cleaner script. Note: The Cleaner script, vmware_install_cleaner.zip, is attached to this article. Run this script when you are logged on as a member of

. However, there are two operation formats for adding data: complete and simple; example: add data-complete syntax writingInsert into myemp (empno, ename, hiredate, sal, mgr, job, comm) VALUES (8888, 'zhang san', TO_DATE ('2017-08-17 ', 'yyyy-mm-dd'), 1000, 8889, 'cleaner',); insert into myemp (empno, ename, hiredate, sal, mgr, job, deptno) VALUES, 'lily', SYSDATE, 8889, 'cleaner', 30); example: add data-si

strategy and role-playing games very much. What kind of games have I been addicted to over the past few years? Civilization, master of Orion, Sim City, command and conquer series, Warcraft/Starcraft series, Ultima series, and Diablo series. Of course, I have played hundreds of other games, but what I like most is those that let me build something and then let it go in the game environment, A game that depends on how it develops. DW: Which of these games is the source of inspiration when you st

CKEditor and TinyMCE. These can be output in HTML and can be visually edited by users. Although they can perform verification on the client side, this is not safe enough. You need to verify and clear Harmful HTML code on the server side to ensure that the HTML entered to your website is safe. Otherwise, attackers can bypass Javascript verification on the client and inject insecure HMTL to your website. Jsoup's whitelist cleaner can filter user input

from a week ago, or delete old data when the partition file exceeds 1 GB. The configuration is as follows: # The minimum age of a log file to be eligible for deletionlog. retention. hours = 168 # the maximum size of a log segment file. when this size is reached a new log segment will be created. log. segment. bytes = 1073741824 # The interval at which log segments are checked to see if they can be deleted according to the retention policieslog. retention. check. interval. ms = 300000 # If log.

pretty code for playback and recording because we have to handle threading in three different ways. the Code also does more copying of data than it cocould do if we controlled the specified actions. The API given to us by wxWidgets tempted us into writing some verbose, hard to follow application code. our solution to that was to add a facade in front of wxWidgets to give us the specified actions we wanted and cleaner application code. In the tra

(); } The second kind of online search, using reflection to call the Clean method:Java code Public static void Unmap (final mappedbytebuffer buffer) { if (buffer = = null) { return; } Accesscontroller.doprivileged (new privilegedaction Public Object Run () { try { Method Getcleanermethod = Buffer.getclass (). GetMethod ("cleaner", new class[0]); if (getcleanermethod! = null) { Getcleanermethod.setaccessible (true)

The keyboard is the easiest part of the notebook computer to accumulate dust, look at each key cap to know that it is the best hiding place under the dust. Too much dust will accelerate the corrosion of the keyboard's conductive rubber, causing damage to the printed circuit of the keyboard. Next, let's use five different cleaning methods to get the keyboard clean. Cleaning tools before cleaning: Keyboard cleaning machine, USB keyboard vacuum cleaner,

function, in the registry to find software-related key values, find and delete, there may be more than one, you can use the F3 shortcut keys to continue to find, until all the items are all deleted. Use professional clean up the garbage software "Junk File Cleaner (Fileclear)" is a green free gadget, with only 335KB, junk file Cleaner No installation can be used directly after downloading. The tool's i