标签：24 版本 Windows cache file mysql MySQL size

例子：5.5------5.7.24

1. 下载新的MySQL，本机原有的是MySQL5.5，下载MySQL5.7.24链接https://downloads.mysql.com/archives/community/选择自己要安装的版本（mysql-5.7.24-winx64.zip）
2. 解压，下载完成后解压到自己想要的位置
3. 配置mysql.in,从原有的MySQL5.5的文件夹下复制mysql.ini，粘贴到解压的目录下，
   
4. 修改mysql.ini文件，

# MySQL Server Instance Configuration File
# ----------------------------------------------------------------------
# Generated by the MySQL Server Instance Configuration Wizard
#
#
# Installation Instructions
# ----------------------------------------------------------------------
#
# On Linux you can copy this file to /etc/my.cnf to set global options,
# mysql-data-dir/my.cnf to set server-specific options
# (@localstatedir@ for this installation) or to
# ~/.my.cnf to set user-specific options.
#
# On Windows you should keep this file in the installation directory 
# of your server (e.g. C:\Program Files\MySQL\MySQL Server X.Y). To
# make sure the server reads the config file use the startup option 
# "--defaults-file". 
#
# To run run the server from the command line, execute this in a 
# command line shell, e.g.
# mysqld --defaults-file="C:\Program Files\MySQL\MySQL Server X.Y\my.ini"
#
# To install the server as a Windows service manually, execute this in a 
# command line shell, e.g.
# mysqld --install MySQLXY --defaults-file="C:\Program Files\MySQL\MySQL Server X.Y\my.ini"
#
# And then execute this in a command line shell to start the server, e.g.
# net start MySQLXY
#
#
# Guildlines for editing this file
# ----------------------------------------------------------------------
#
# In this file, you can use all long options that the program supports.
# If you want to know the options a program supports, start the program
# with the "--help" option.
#
# More detailed information about the individual options can also be
# found in the manual.
#
#
# CLIENT SECTION
# ----------------------------------------------------------------------
#
# The following options will be read by MySQL client applications.
# Note that only client applications shipped by MySQL are guaranteed
# to read this section. If you want your own MySQL client program to
# honor these values, you need to specify it as an option during the
# MySQL client library initialization.
#
[client]
# 自己想要用哪个端口号就改那个，所有一致
port=3307

[mysql]

default-character-set=utf8


# SERVER SECTION
# ----------------------------------------------------------------------
#
# The following options will be read by the MySQL Server. Make sure that
# you have installed the server correctly (see above) so it reads this 
# file.
#
[mysqld]

# The TCP/IP Port the MySQL Server will listen on
# 和上面一致
port=3307


#Path to installation directory. All paths are usually resolved relative to this.
# 解压路径
basedir="G:/MySQL/mysql-5.7.24-winx64/"

#Path to the database root
# 解压路径这里写data，但是目录下不要自己新建
datadir="G:/MySQL/mysql-5.7.24-winx64/data/"

# The default character set that will be used when a new schema or table is
# created and no character set is defined
character-set-server=latin1

# The default storage engine that will be used when create new tables when
default-storage-engine=INNODB

# Set the SQL mode to strict
sql-mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"

# The maximum amount of concurrent sessions the MySQL server will
# allow. One of these connections will be reserved for a user with
# SUPER privileges to allow the administrator to login even if the
# connection limit has been reached.
max_connections=100
max_allowed_packet=500M

wait_timeout=288000 

interactive_timeout = 288000 
character-set-server=utf8
default-storage-engine=INNODB
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES


# Query cache is used to cache SELECT results and later return them
# without actual executing the same query once again. Having the query
# cache enabled may result in significant speed improvements, if your
# have a lot of identical queries and rarely changing tables. See the
# "Qcache_lowmem_prunes" status variable to check if the current value
# is high enough for your load.
# Note: In case your tables change very often or if your queries are
# textually different every time, the query cache may result in a
# slowdown instead of a performance improvement.
query_cache_size=0
 
# The number of open tables for all threads. Increasing this value
# increases the number of file descriptors that mysqld requires.
# Therefore you have to make sure to set the amount of open files
# allowed to at least 4096 in the variable "open-files-limit" in
# section [mysqld_safe]
table_open_cache=256
 
# Maximum size for internal (in-memory) temporary tables. If a table
# grows larger than this value, it is automatically converted to disk
# based table This limitation is for a single table. There can be many
# of them.
tmp_table_size=35M
 
 
# How many threads we should keep in a cache for reuse. When a client
# disconnects, the client's threads are put in the cache if there aren't
# more than thread_cache_size threads from before.  This greatly reduces
# the amount of thread creations needed if you have a lot of new
# connections. (Normally this doesn't give a notable performance
# improvement if you have a good thread implementation.)
thread_cache_size=8
 
#*** MyISAM Specific options
 
# The maximum size of the temporary file MySQL is allowed to use while
# recreating the index (during REPAIR, ALTER TABLE or LOAD DATA INFILE.
# If the file-size would be bigger than this, the index will be created
# through the key cache (which is slower).
myisam_max_sort_file_size=100G
 
# If the temporary file used for fast index creation would be bigger
# than using the key cache by the amount specified here, then prefer the
# key cache method.  This is mainly used to force long character keys in
# large tables to use the slower key cache method to create the index.
myisam_sort_buffer_size=69M
 
# Size of the Key Buffer, used to cache index blocks for MyISAM tables.
# Do not set it larger than 30% of your available memory, as some memory
# is also required by the OS to cache rows. Even if you're not using
# MyISAM tables, you should still set it to 8-64M as it will also be
# used for internal temporary disk tables.
key_buffer_size=55M
 
# Size of the buffer used for doing full table scans of MyISAM tables.
# Allocated per thread, if a full scan is needed.
read_buffer_size=64K
read_rnd_buffer_size=256K
 
# This buffer is allocated when MySQL needs to rebuild the index in
# REPAIR, OPTIMZE, ALTER table statements as well as in LOAD DATA INFILE
# into an empty table. It is allocated per thread so be careful with
# large settings.
sort_buffer_size=256K

1. 以管理员身份去运行命令行窗口
   
2. 进入mysql5.7的bin目录下
3. 安装mysql服务，指定该mysql服务名为mysql2,并根据my.ini文件进行安装，命令如下：

C:\Windows\system32>G:

G:\>cd G:\MySQL\mysql-5.7.24-winx64\bin

G:\MySQL\mysql-5.7.24-winx64\bin>mysqld install mysql5.7.24 
 
成功安装后会提示：
Service successfully installed.

去服务里面，可查看到此时多了一个mysql5.7.24服务

选中原先自己的MySQL服务，右键停止

8. 初始化数据库，在bin目录下执行如下命令

G:\MySQL\mysql-5.7.24-winx64\bin>mysqld --initialize

初始化成功后，命令行没有任何提示。但在mysql5.7文件夹中已自动生成了data目录

9. 打开注册表，找到HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mysql2,修改ImagePath参数，更正mysql5.7.24服务相关路径。

G:\MySQL\mysql-5.7.24-winx64\bin\mysqld mysql5.7.24

10. 重置root密码，
    在 bin 目录下输入 cmd管理员运行 mysqld --skip-grant-tables ，跳过权限检查启动 mysql。（此时这个界面没有返回值）再重新打开一个 bin 目录下的 cmd管理员命令行
    输入mysql命令，跳过安全检查，直接进入数据库

update user set password = password('新密码') where user = 'root' and host = 'localhost';

如果报错执行 flush privileges; 命令刷新权限表，再重新重置密码

11. 执行 flush privileges; 命令刷新权限表
12. 退出，成功

标签：24,版本,Windows,cache,file,mysql,MySQL,size
来源： https://blog.csdn.net/qq_46415567/article/details/116889223

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。