mysql innodb

Innodb_buffer_pool_sizeThe innodb_buffer_pool_size parameter is used to set the size of InnoDB's primary buffer (Innodb_buffer_pool), which is the most significant cache space for cached user tables and index data, and has the greatest impact on

MySQL corresponds to InnoDB versionMySQL 5.1 "InnoDB 1.0.XMySQL 5.5 "InnoDB 1.1.XMySQL 5.6 "InnoDB 1.2.XBackground thread1.Master ThreadResponsible for asynchronously flushing data from the buffer pool to disk to ensure consistency of data,

MysqlInnoDB Configuration DetailedInnodb_buffer_pool_size: This is the most important setting for InnoDB, which has a decisive impact on InnoDB performance. The default setting is only 8M, so the default database setting below InnoDB performance is

MySQL Memory structureInnoDB Primary index is clustered index, index and data common table space, for InnoDB, data is index, index is data. The biggest difference between the InnoDB cache mechanism and the MyISAM cache mechanism is that INNODB is

"Reference book: MySQL technology insider InnoDB Storage Engine" "References some blog content"The isolation of transactions is implemented by the locking mechanism, and the atomicity, consistency, and persistence of transactions are accomplished

MySQL InnoDB Engine table copies physical files for single-table or specified table replication, you can think of many ways to test 2 of them today: Modify the InnoDB engine's table to the MyISAM engine, and then copy the physical file

The lock in MySQL InnodbLock is a necessary means to resolve concurrency conflicts, concurrency in MySQL mainly refers to the simultaneous operation of multiple threads on the same database, where different threads may represent different

There are four transaction isolation levels for Mysqlinnodb: ( default is repeatable read REPEATABLE read)UNCOMMITTED Read Uncommit : The data was modified in another transaction but not yet committed, and in this transaction the SELECT statement

After work in the morning, MySQL server encountered a small problem, during the troubleshooting process to view the MySQL error log process found that several InnoDB tables could not be opened, using DESC to view the table structure hints table on

MySQL official manual read lock instructionsIf, in the same transaction, you query the data and insert/Update data related to this data, the usual SELECT statement will not give us enough protection. Because in the time period between the Select and

InnoDB Index Organization tableI. Index organization TABLE definitionIn the InnoDB storage engine, tables are organized according to the primary key order , which is called the Index Organization table (Index organized table IOT).In the InnoDB

This article describes the InnoDB cluster configuration and testing process under MySQL version 8, the core of which is the MySQL group replication feature, which simplifies the configuration of group replication by using MySQL shell while using

Yesterday, because of the character set conversion related errors, today want to verify the next UTF8 and gbk the gap between the respective space. This test, the absolute destruction of the three views, whether Chinese or Chinese + English, GBK and

1, Shared lock experimentSession1Build a table Lisa and insert data in Session1Mysql> CREATE table Lisa (name char (ten), age int (5));Mysql> INSERT into Lisa values (' Lisa ', ' 26 ');Add a shared lock to the age=26 lineMysql> set

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

Recommended Parameters: max_connections=800 key_buffer_size=512mquery_cache_size=128msort_buffer_size=64mtable_open_cache=512 Sort_buffer_size = 2MRead_buffer_size = 2MRead_rnd_buffer_size = 8MMyisam_sort_buffer_size = 64M

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MySQL lock processing analysis (InnoDB) Background MySQL/InnoDB lock analysis has always been a difficult topic. During my work, I often ask questions from my colleagues. At the same time, Weibo often receives MySQL lock-related private messages,

MySQL Plus Lock Processing analysis Original: http://hedengcheng.com/?p=7711 background 11.1 Mvcc:snapshot Read vs current Read 21.2 Cluster Index: Clustered Indexes 31.3 2pl:two-phase Locking 31.4 Isolation Level 42 A simple SQL Lock implementation

This article from: Ho Dengcheng's Technical BlogI. BACKGROUNDMysql/innodb's locking analysis has been a difficult topic. In the course of my work, my colleagues have often consulted on this issue. At the same time, the micro-blog also often receive