innodb monitor

Myisam table to innodb table to convert from InnoDB engine to MyISAM engine. after reading this article, you should know how to convert MyISAM engine to InnoDB engine (please make sure InnoDB is enabled, mySQL command line show engines command view ). Mysql> alter table boblog_history ENGINE =

The main work of the InnoDB Storage engine is completed in a separate background thread MasterThread. 1. MasterThreadMasterThread before InnoDB1.0.x has the highest thread priority. It consists of multiple loops: Main loop, backgrouploop, flushloop, and pause loop (s ). The main work of the InnoDB Storage engine is completed in a separate background Thread Master Thread. 1. The Master Thread before

G, the solution is as follows: In the/var/lib/MySQL directory, delete ibdata1, ib_logfile1, and ib_logfile0, and restart MySQL to recreate the above files: Mysqladmin-uroot-P Shutdown Sudo mysqld_safe Done! Below are otherArticle. For more information, see.In the morning, I went to the PHP site and went to test a CMS system written by someone else. I was glad to download it.ProgramAnd then copy the program to its directory. Because the program does not have install. php, it only contains a

Label:MyISAM InnoDB Difference MyISAM and InnoDB explain InnoDB and MyISAM are the two most common table types that many people use when using MySQL, both of which have pros and cons, depending on the application. The basic difference is that the MyISAM type does not support advanced processing such as transaction processing, and

(0.00 sec) Similarly, if the user estimates that their hotspot data is more than 63%, you can also reduce the probability of the hot page being brushed by using the following statement before executing the SQL statement. mysql> set global innodb_old_blocks_pct=20; Query OK, 0 rows Affected (0.00 sec) The LRU list is used to manage pages that have been read, but when the database is just started, the LRU list is spatiotemporal, that is, there are no pages. The page is then placed in the fr

Key features of InnoDB-insert cache, write twice, adaptive hash index details, innodbhash Key features of the InnoDB Storage engine include insert buffer, double write, and adaptive hash index ). These features provide better performance and higher reliability for the InnoDB Storage engine. Insert Buffer Insert buffering is the most exciting feature of the

The main difference between the two types is that Innodb supports transaction processing and Foreign keys and row-level locks, but MyISAM does not. Therefore, MyISAM is often considered only suitable for small projects. From the perspective of MySQL users, Innodb and MyISAM both prefer, but from the perspective of my current O M database platform to meet the requirements: 99.9% Stability The main differenc

The following articles mainly introduce the comparison between the actual performance of MySQLMyISAM engine and InnoDB engine, first, we use the table structure of the MySQL database to introduce the actual performance operations of the MySQLMyISAM engine and the InnoDB engine. CREATETABLE 'myisam' ('id' int (11) NOTNULLauto_increment, 'name' varchar (100) defa The following articles mainly introduce the co

Tags: show var sam table structure IV data Batch CTI index dataIntroduction of Storage Engine MySQL uses a separation of business logic and data storage architecture, the underlying storage engine for the upper layer of the SQL support; MySQL uses plug-in way to load the storage engine directly into the running MySQL, which is an important feature of MySQL; The following command can query the current MySQL-supported storage engine: Show engines; This article environment: 1) The MySQL version is:

Tags: where empty bin CTI new allows direct query of storage spaceTransfer from http://www.cnblogs.com/hepingqingfeng/p/7267211.html 1. Storage structureMyISAM: Stored as three files.. frm file store table definition. MYD (MYData): MYI (Myindex). InnoDB: Saved in the same data file, the size of the InnoDB table is limited only by the size of the operating system file, typically 2GB.2. Storage spaceMyISAM: C

Tags: store south SQL primary key place two pointers Google AST cluster Summary: This article describes MySQL's InnoDB index-related knowledge, from a variety of tree-to-index principles to the details of storage. InnoDB is the default storage engine for MySQL (Mysql5.5.5 before MyISAM, documentation). Based on the purpose of efficient learning, this article mainly introduces

Tags: extended pressure lock architecture 9.png limit Smon redo Log FrameInnoDB has multiple blocks of memory that you can think of as a large pool of memory that is responsible for the following tasks: Maintains multiple internal data structures that all processes/threads need access to. Cache the data on the disk for quick and easy reading, and cache it here before modifying the data on the disk file. Redo log (redo log) buffer. .......... The primary role of a bac

Label:1. MyISAM Watch engine Features(1) MyISAM is the MySQL default storage engine (2) Most tools with inspection and repair forms. (3) The table can be compressed (4) Support full-text search. (5) It is not a matter of security. If the rollback of a thing causes incomplete rollback, it does not have atomicity. (6) Foreign keys are not supported. (7) If the execution of a large number of select,myisam is a better choice. (8) Each MyISAM table is stored in three files: the frm file is stored as

According to the official manual recommended InnoDB buffer Hit ratios calculation is: 100-((ireads/ireadrequests) *100) ireads:mysql->status->innodb_buffer_pool_reads iReadRequests: Mysql->status->innodb_buffer_pool_read_requests Source: http://dev.mysql.com/doc/mysql-monitor/2.0/en/mem_graphref.htmlSearch "Hit ratios"Recommend interested students to look at this page should also have a great

In this article, I will discuss a related topic: ndash; InnoDB Transaction Isolation Mode, their relationships with MVCC (Multi-version concurrency control), and how they affect In this article, I will discuss a related topic: ndash; InnoDB Transaction Isolation Mode, their relationships with MVCC (Multi-version concurrency control), and how they affect I have written two articles over the past few mon

Recently, the mysqlinnodb storage engine has been optimized to convert the shared tablespace to an independent tablespace. I didn't think so much at the beginning, so I had to promote it in a short time, So I optimized it, Recently, the mysql innodb Storage engine was optimized to convert the shared tablespace into an independent tablespace. I didn't think so much at the beginning, so I had to promote it in a short time, So I optimized it, Recent

In the process of using MySQL, there are some questions about the concepts of MyISAM and InnoDB, and the difference between the two engines has always been a question in my mind. To solve this puzzle, we searched the network and found the following information: MyISAM is the default database engine for MySQL (before version 5.5), improved by the early ISAM (Indexed sequential access method: Indexed sequential access methods). Although performance i

MyISAM and memory using table-level locks (table-level locking) BdB with page locks (page-leve locking) or table-level locks, default to page locks InnoDB supports row-level locks (row-level locking) and table-level locks, which default to row-level locks Various lock features Table-level Lock: Low overhead, lock fast, no deadlock, high locking granularity, highest probability of conflict, minimum concurrency Row-level locks: large overhead, slow