mysql innodb

Mysql innodb Learning (1) the two most common storage engines in mysql are Myisam and innodb. There are many differences and comparisons between the two engines on the Internet, I will not explain it here. Here I will focus on the role of each

A friend of the Mysql InnoDB bufferpool blog asked this question and found the following explanations on the Internet, hoping to help him solve the problem of using www.2cto.com: I found that after bufferpool is used up, insert is complete and then

Configure bare devices for Linux UDEV and MySQL InnoDB shared tablespaces (1) UDEV basic udev can manage files stored in the/dev directory. Files are generated only after the device is connected. automatic deletion also allows you to add rules to

Mysql innodb lock classification I. innodb row lock classification record lock: record lock, that is, only one row of gap lock is locked: interval lock, lock only one interval (note that the interval here is an open interval, that is, the boundary

Configure the independent tablespace of MySQL Innodb to configure the database as an independent tablespace: 1. see [SQL] mysql> show variables like '% per_table % '; + rows + ------- + | Variable_name | Value | + ----------------------- + -------

[MySQL] InnoDB features-two writes today we will introduce the second feature of the InnoDB Storage engine-two writes (doublewrite). If the insert buffer is used to improve the write performance, therefore, the two writes sacrifice a little bit of

[MySQL] InnoDB row format AnalysisLike most row-based databases, InnoDB stores records in the row format. It provides two formats: Compact and Redundant.CompactThe Compact format is introduced only when MySQL5.0 is used. It is a new row format and

In practice, some colleagues often asked: what is the appropriate number of records in the MySQL Innodb table?Generally, the larger the table, the lower the performance. But how low is it? Is it a slow decline or a sharp decline? Is it a decline of 1

MySQL innodb Engine analysis (initialization), mysqlinnodb MySQL's storage engine works in the form of plug-ins. This should be a major feature of MySQL! According to the deep understanding of MySQL, the plug-ins of the storage engine in version 5

Shared table SpacesAll the table data of a database, the index file is placed in a file, the default file path for this shared tablespace is in the data directory. The default file name is ibdata1 , initialized to 10M .Because it is the default way,

Recently, in the project development process, encountered the database deadlock problem, in the process of solving the problem, the author of the MySQL InnoDB engine lock mechanism understanding gradually deepened. The case is as follows: The

There is an insert intent lock in the InnoDB. Specifically for insert, assuming that the gap has been locked by gap before insertion, insert will request an intent lock.So what is the purpose of this insert intent lock?1, in order to arouse waiting.

MySQL InnoDB in the transaction log Ib_logfileThe transaction log or the redo log, in MySQL by default in the Ib_logfile0,ib_logfile1 name exists, you can manually modify the parameters, adjustOpen a few sets of logs to serve the current MySQL

Starting with MySQL version 5.5 InnoDB is already the default table storage engineInnoDB1: Full acid support2: Row-level lock support3: Support MVCC4: Support for foreign keysMySQL Version 5.1Prior to MySQL version 5.1, InnoDB was included in the

Http://heylinux.com/archives/2367.htmlhttp://blog.csdn.net/ywh147/article/details/8996022Students who have used MySQL have just started to touch the MyISAM table engine, the database of this engine will create three files: Table structure, table

Objective: We all know the nature of transactions, the database in order to maintain these properties, especially consistency and isolation, the general use of lock this way. At the same time, the database is a high concurrency application,

This article is about MySQL database InnoDB storage engine redo log roaming00–undo LogThe Undo Log is to implement the atomicity of the transaction in the MySQL database InnoDB storage engine. Also use undo log to implement multiple version

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

Physically, the InnoDB table consists of a shared tablespace, a log file group (redo filegroup), and a table structure definition file. If Innodb_file_per_table is set to ON, a TABLE_NAME.IBD file is generated for each table, in which data, indexes,

What is an index An index is a data structure, usually a b-tree, Hash, that stores the values of a particular column (one or more columns) in a table. Its purpose is to help the database to obtain data efficiently, quickly find the specified