mysql innodb

InnoDB is the first engine on MySQL to provide a foreign key constraint, in addition to providing transaction processing, InnoDB also supports row locks, providing no lock reading consistent with Oracle, increasing the number of concurrent read

Problem Description:Morning received Zabbix alarm, prompt host:10.10.1.2, MySQL master and slave synchronization failed.Log on to the server to see the details.Shell >Mysqlmysql>show slave Status\gslave I/O thread:yesslave SQL thread:noslave

Before InnoDB lock, why start transactionInnoDB the release of a lock after a transaction commit/rollback, once the transaction commits/rolls back, the lock in the transaction is automatically freed, InnoDB automatically commits by default

Isolation level of the transaction:　　READ UNCOMMITTED (UNCOMMITTED)At this level, the changes in the transaction, even if not committed, are visible to other transactions, and the transaction can read uncommitted data.　　Read COMMITTED (submit

The parameter Innodb_fast_shutdown controls the InnoDB shutdown mode with three values:0: InnoDB performs slow shutdown, completes a full purge and change before closing Buffer Perge and flushes all dirty pages back to disk.    It may take a few

Overview In general, once the database structure has been designed, it cannot be easily changed because changes DDL (Data Definition Language) are expensive to operate, so you need to be cautious about database structure design. However, business

Add by Zhj: It seems that my understanding of MySQL has yet to be deepened, the water is still quite deep ah, MySQL to record lock, you can set the time-out through the innodb_lock_wait_timeout parameter,If the lock waits longer than this time, it

Concept:Locks are used to manage concurrent access to shared files. InnoDB locks the database at the row level. However, the InnoDB storage engine uses locks in many other places within the database, allowing concurrent access to different resources.

MySQL lock mechanism for different engines:MyISAM and memory with table-level lock (Table-level locking)BDB with page lock (page-leve locking) or table-level lock, default to page lockInnoDB supports row-level locks (row-level locking) and

InnoDB storage engine for online transaction processing, characterized by row lock design, support for foreign keys, and supports oricle-like non-locking read (the so-called non-locking read is if the database instance reads a row that is being

# for advice The change settings# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html# * * * Don't EDIT this FILE. It ' s a template which'll be copied to the# * * * default location during install, and would be replaced if you#

InnoDB and MyISAM are two of the most common data storage engines for MySQL. Databases such as Oracle and SQL Server have not been researched, so the following is only for MySQL.Data storage structure in one or two ways:Under MyISAM, every data

Http://www.bubuko.com/infodetail-1861798.html1 Various tree-shaped structuresOriginally not intended to start from the two-fork search tree, because there are too many related articles on the Internet, but considering the clear diagram of the

Transferred from: http://blog.csdn.net/wyzxg/article/details/7700394MySQL official website configuration description Address: http://dev.mysql.com/doc/refman/5.5/en/innodb-parameters.htmlOther references:"High performance MySQL"-8.4.5 innodb buffer

1.1.Log & CheckpointInnoDB transaction log refers to Redolog, which is called log , stored in the log file ib_logfile* inside. InnoDB There is another log of undo logs, but the undo log is stored in the shared tablespace (ibdata* file).Because Log

mysql ver 14.14 distrib 5.7.16, for linux-glibc2.5  (x86_64)  using  EditLine wrapper  #mysql版本  5.7.16connection id: 10042current database:  china9129current user: [email protected]ssl: not in usecurrent pager:  stdoutUsing outfile:  '

Some of the benefits of partitioning include:1), more data can be stored than a single disk or file system partition.2), for those data that has lost its meaning, it is often possible to delete those data by deleting the partitions associated with

1, Adaptive Hash Indexes definitionIf a table fits almost entirely in main memory, the fastest-to-perform queries on it's to use hash indexes. Has InnoDB a mechanism this monitors index searches made to the indexes defined for a table. IF InnoDB

Recently, I have been looking at Mysql concurrency control, transaction processing, and other knowledge to make some preparations. Concurrency Control aims to ensure data consistency when multiple connections modify the database. Currently, mysql

As we all know, the default engine of MySQL5.1.46 is Myisam. How can I enable the InnoDB engine? I encountered many errors when installing the database and enabling the InnoDB engine. As we all know, MySQL 5.1.46 uses the default engine Myisam. How