MySQL从MyISAM转换成InnoDB错误与常用解决办法
由于一些程序的要求,需要MyISAM数据引擎或InnoDB,下面是具体的解决方法,经测试偶尔会出现一些问题。
原来自己用的是为了装的, 所以在设置database usage(如下图1)的时候按照discuz官方的建议,选的都是Non-Transactional Database Only(只支持MyISAM数据引擎的非事务数据库),用MyISAM数据库,还没涉及到需要InnoDB,因此打算直接不加载INNODB引擎。后来在做WordPress,一开始还不知道原来WordPress用的是InnoDB数据引擎,于是在原来的数据库里面就建了一个数据库,一开始也没发觉问题,安装,导入sql,都没问题,当时也没多想。直到这几天因为又要装多一个WordPress,用phpmyadmin访问数据库多一点,问题来了。老是一访问WordPress的数据库,就弹出错误提示“Mysqld-nt.exe应用程序错误:“0x005346c4”指令引用的“0x00786000”内存,该内存不能为读...”,然后就MySQL服务也停了,登陆不了,整个数据库都访问不了。
图1 设置数据库类型
纠结了挺久,也忘了是看到什么文章触发了灵感,反正后来才知道原来是数据引擎不同惹的祸。于是就想到重新运行次设置向导,把数据库类型改成支持InnoDB引擎的。马上行动,在向导里设置数据库类型(也就是图1的database usage)那里,设置成第二项,还在后面的InnoDB Tablespace Settings里把InnoDB数据文件设置放在D:\MySQL InnoDB Datafiles目录里。但是在最后execute执行的时候,却老是在Start Service那里出问题,如下图2。
图2 Start service出错

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

InnoDB is a storage engine that stores data in tables on disk, so our data will still exist even after shutdown and restart. The actual process of processing data occurs in memory, so the data in the disk needs to be loaded into the memory. If it is processing a write or modification request, the contents in the memory also need to be refreshed to the disk. And we know that the speed of reading and writing to disk is very slow, which is several orders of magnitude different from reading and writing in memory. So when we want to get certain records from the table, does the InnoDB storage engine need to read the records from the disk one by one? The method adopted by InnoDB is to divide the data into several pages, and use pages as the basic unit of interaction between disk and memory. The size of a page in InnoDB is generally 16

InnoDB is one of the database engines of MySQL. It is now the default storage engine of MySQL and one of the standards for binary releases by MySQL AB. InnoDB adopts a dual-track authorization system, one is GPL authorization and the other is proprietary software authorization. InnoDB is the preferred engine for transactional databases and supports transaction security tables (ACID); InnoDB supports row-level locks, which can support concurrency to the greatest extent. Row-level locks are implemented by the storage engine layer.

1. Mysql transaction isolation level These four isolation levels, when there are multiple transaction concurrency conflicts, some problems of dirty reading, non-repeatable reading, and phantom reading may occur, and innoDB solves them in the repeatable read isolation level mode. A problem of phantom reading, 2. What is phantom reading? Phantom reading means that in the same transaction, the results obtained when querying the same range twice before and after are inconsistent as shown in the figure. In the first transaction, we execute a range query. At this time, there is only one piece of data that meets the conditions. In the second transaction, it inserts a row of data and submits it. When the first transaction queries again, the result obtained is one more than the result of the first query. Data, note that the first and second queries of the first transaction are both in the same

1. Roll back and reinstall mysql. In order to avoid the trouble of importing this data from other places, first make a backup of the database file of the current library (/var/lib/mysql/location). Next, I uninstalled the Perconaserver 5.7 package, reinstalled the original 5.1.71 package, started the mysql service, and it prompted Unknown/unsupportedtabletype:innodb and could not start normally. 11050912:04:27InnoDB:Initializingbufferpool,size=384.0M11050912:04:27InnoDB:Complete

MySQL storage engine selection comparison: InnoDB, MyISAM and Memory performance index evaluation Introduction: In the MySQL database, the choice of storage engine plays a vital role in system performance and data integrity. MySQL provides a variety of storage engines, the most commonly used engines include InnoDB, MyISAM and Memory. This article will evaluate the performance indicators of these three storage engines and compare them through code examples. 1. InnoDB engine InnoDB is My

MySQL is a widely used database management system, and different storage engines have different impacts on database performance. MyISAM and InnoDB are the two most commonly used storage engines in MySQL. They have different characteristics and improper use may affect the performance of the database. This article will introduce how to use these two storage engines to optimize MySQL performance. 1. MyISAM storage engine MyISAM is the most commonly used storage engine for MySQL. Its advantages are fast speed and small storage space. MyISA

Tips and strategies to improve the read performance of MySQL storage engine: Comparative analysis of MyISAM and InnoDB Introduction: MySQL is one of the most commonly used open source relational database management systems, mainly used to store and manage large amounts of structured data. In applications, the read performance of the database is often very important, because read operations are the main type of operations in most applications. This article will focus on how to improve the read performance of the MySQL storage engine, focusing on a comparative analysis of MyISAM and InnoDB, two commonly used storage engines.

MySQL storage engine supporting GIS data: Spatial index optimization in InnoDB Abstract: In modern database applications, geographic information system (GIS) data plays an increasingly important role. GIS data processing is complex and dynamic, and traditional relational databases are not good at processing this type of data. However, MySQL provides a storage engine, InnoDB, that can optimize the processing of GIS data. This article will introduce how to use spatial indexes on the InnoDB storage engine to optimize GIS data.
