mysql innodb

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). In the purpose of

http://blog.csdn.net/dong976209075/article/details/8802778Experience Summary:After Python uses the MYSQLDB database, such as using multiple threads, each thread creates a DB link, and then each creates a cursor cursor, where the first thread reads a

MySQL study--mysql InnoDB Engine Backup tool One of the Xtrabackup (Install)Xtrabackup is a innodb to do data backup tools, Support Online hot backup (backup without affecting the data read and write), is a commercial backup tool InnoDB hotbackup a

The role of ibdata in mysql Innodb and the separation of ibdata In the mysql INNODB data state is used to store file data, while the table files in the folder of the database name are only structured. Be careful, you must be careful not to delete it.

Mysql InnoDB completely releases disk space, mysqlinnodb The Innodb database only marks deleted data and does not actually release the occupied disk space, which leads to the increasing number of InnoDB database files. To completely release the disk

For innodb independent tablespaces, delete cannot recycle the space occupied by the disk. You can use truncate (the principle is to delete or recreate it first; Directly alter table .... engine = innodb can be used to sort shards and reclaim some

This article is on the Mysql/innodb, optimistic lock, pessimistic lock, shared lock, exclusive lock, row lock, table lock, deadlock concept understanding, these are often encountered in the interview, such as database high concurrent requests, how

A deadlock occurs after MySQL InnoDB locks are unlocked.[Error] Deadlock found when trying to get lock; Try restarting transactionOne thing to keep in mind is this: InnoDB's row lock and unlock are for primary key indexing. If the query is based on

At present, this cluster application in its own Django demo environment, temporarily stable operation. Welcome to Dabigatran 620176501 to discuss the application of Mysql cluster. Core Architecture* MySQL 5.7 引入了 Group Replication 功能，

As we all know, the MyISAM engine uses a table lock, while the InnoDB minimum granularity is a row lock. In practice, however, we sometimes find that even if we are working with data that is not in the same row, a lock table will occur. Let's look

This paper will further explain the locking mechanism of INNODB through the process of solving the deadlock problem in a practical example.Recently, in the project development process, encountered the database deadlock problem, in the process of

In some cases, the online production environment often occurs with a deadlock in the database operation, which prevents the business personnel from operating. After the DBA's analysis, there was a deadlock in the insert operation and delete

On MySQL InnoDB cache policy:The InnoDB Buffer PoolInnodb holds a storage area called buffer pool to cache data and indexes in memory, knowing how Innodb Bufferpool works, and using it to read frequently accessed data, is an important aspect of

It is always customary to compare with Oracle database when learning MySQL. When learning the storage structure of MySQL InnoDB, it is also unavoidable to compare with Oracle. Oracle's data storage is table space, segments, blocks, chunks, data

Chat about MySQL InnoDB storage engine (i)Chat about MySQL's InnoDB storage Engine (ii)Chat about MySQL InnoDB storage engine (end)In this paper, we discuss the processing method of Phantom reading in InnoDB engine and the detection of deadlock and

Simple sorting of MySQL InnoDB Engine B + tree indexes, mysqlinnodb   Standard Source: http://www.cnblogs.com/wy123/p/7211742.html (The Source retained is not the right of original works. My work is far from reaching this level, just to link to the

Mysql Innodb Lock Mechanism and mysqlinnodb Lock MechanismLatch and lock Latch can be considered as a lock in an application. It can be called a latch (lightweight lock) because it requires a very short lock time. If the lock lasts for a long time,

Mysql-InnoDB storage engine Foreign key constraint -- (ForeignKeyConstraint) Mysql foreign key SQL foreign key constraints The foreign key in one table points to the primary key in another table. The foreign key constraint is used to prevent the

This article describes how to get started with the InnoDB engine of MySQL and provides a better summary of the storage structure of InnoDB. For more information, see MySQL development to this day, the InnoDB engine has been an absolute main force.

After the mysql innodb row lock is unlocked, the result is 1213 dead, like Deadlock found when. To solve this problem, remember that innodb row locks and locks are for primary key indexes. If the table is locked Based on the index during the query,