What is InnoDB and MyISAM in MySQL? - Stack Overflow
2010年9月29日 · InnoDB is a storage engine for MySQL, included as standard in all current binaries distributed by MySQL AB. Its main enhancement over other storage engines available for use with MySQL is ACID-compliant transaction support. MyISAM is the default storage engine for the MySQL relational database management system versions prior to 5.5 1.
When should you choose to use InnoDB in MySQL?
2014年4月8日 · The InnoDB storage engine in MySQL. InnoDB is a high-reliability and high-performance storage engine for MySQL. Key advantages of InnoDB include: Its design follows the ACID model, with transactions featuring commit, rollback, and crash-recovery capabilities to protect user data. Row-level locking (without escalation to coarser granularity ...
sql - How to enable INNODB in mysql - Stack Overflow
2011年1月21日 · If your InnoDB gets disabled after a mysql-server upgrade what you have to do Initially is to set plugin-load of at server startup using. [mysqld] plugin-load="myplugin_1=myplugin_1.so;myplugin_2=myplugin_2.so"; And then specify the pathname to the plugin_dir (plugin directory) it can be done by following changes in the my.cnf file.
mysql - How do I repair an InnoDB table? - Stack Overflow
2015年9月27日 · set-variable=innodb_force_recovery=6. Step 3. delete ib_logfile0 and ib_logfile1. Step 4. Start MySQL server. Step 5. Run this command: mysqlcheck --database db_name table_name -uroot -p. After you have successfully fixed the crashed innodb table, don't forget to remove #set-variable=innodb_force_recovery=6 from my.cnf and then restart MySQL ...
What's the difference between MyISAM and InnoDB? [duplicate]
2012年9月27日 · Those are the two biggest differences. Another big difference is concurrency. With MyISAM, a DML statement will obtain an exclusive lock on the table, and while that lock is held, no other session can perform a SELECT or a DML operation on the table. Those two specific engines you asked about (InnoDB and MyISAM) have different design goals.
mysql - When to use MyISAM and InnoDB? - Stack Overflow
2013年3月28日 · MyISAM is designed with the idea that your database is queried far more than its updated and as a result it performs very fast read operations. If your read to write (insert|update) ratio is less than 15% its better to use MyISAM. InnoDB uses row level locking, has commit, rollback, and crash-recovery capabilities to protect user data.
Howto: Clean a mysql InnoDB storage engine? - Stack Overflow
2018年2月17日 · Now, ibdata1 will still grow but only contain table metadata because each InnoDB table will exist outside of ibdata1. ibdata1 will no longer contain InnoDB data and indexes for other tables. For example, suppose you have an InnoDB table named mydb.mytable. If you look in /var/lib/mysql/mydb, you will see two files representing the table:
How to convert all tables from MyISAM into InnoDB?
2010年10月4日 · 1. Follow steps: Use MySql commands as follows, for converting to InnoDB (ALTER TABLE t1 ENGINE = InnoDB) or (ALTER TABLE t1 ENGINE = MyISAM) for MyISAM (You should do this for each individual tables, t1 is for the table name.). Write a script that loops on all tables and run the alter command.
mysql - How do I check my InnoDB settings? - Stack Overflow
2013年7月31日 · See the manual for the full list of possible InnoDB variables your setup may have. (Note that the manual shows the options for the latest version in each "release series". For example, the new innodb_flush_sync has just been added a few days ago, but it is already online in the 5.7 release series manual.) To dump them all, use:
innodb - recover mysql database from ibdata1 - Stack Overflow
If in the first step you incremented your innodb_force_recovery => 4, you need to set it below 4. As of 5.6.15, an innodb_force_recovery setting of 4 or greater places InnoDB in read-only mode. Start the mysqld server. Import your exported databases or tables. mysql -u root -p < /tmp/mysqldump-all.sql. Incremented your innodb_force_recovery => 1