1. 操作系统
CentOS release 6.2 (Final)
2. 创建用户和组
[root@mymaster1 ~]# groupadd mysql
[root@mymaster1 ~]# useradd -r -g mysqlmysql
3. 解压安装包(解压到你想存储数据库数据的地方)
[root@mymaster1 ~]# cd /data
[root@mymaster1 data]# tar -xzvf /root/mysql_soft/mysql-5.6.19-linux-glibc2.5-x86_64.tar.gz
[root@mymaster1 data]# ln -s mysql-5.6.19-linux-glibc2.5-x86_64 mysql
4. 查看解压情况
[root@mymaster1 data]# ll
总用量 20
lrwxrwxrwx. 1 root root 34 6月 27 15:31 mysql -> mysql-5.6.19-linux-glibc2.5-x86_64
drwxr-xr-x. 13 rootroot 4096 6月 27 15:31 mysql-5.6.19-linux-glibc2.5-x86_64
5. 修改文件夹所属用户和组为mysql:
[root@mymaster1 data]# cd mysql
[root@mymaster1 mysql]# chown -R mysql:mysql .
6. 安装数据库,数据存放目录为/data/mysql/data
[root@mymaster1 mysql]#scripts/mysql_install_db --user=mysql --basedir=/data/mysql --datadir=/data/mysql/data
WARNING: The host'mymaster1.localdomain' could not be looked up with /data/mysql/bin/resolveip.
This probably means thatyour libc libraries are not 100 % compatible
with this binary MySQLversion. The MySQL daemon, mysqld, should work
normally with the exceptionthat host name resolving will not work.
This means that youshould use IP addresses instead of hostnames
when specifying MySQLprivileges !
当出现上面警告时,解决方法是:在/etc/hosts配置文件中增加IP地址和主机名的映射
如
[root@mymaster1 Packages]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
IP地址 mymaster1.localdomain
正确的提示信息如下:
[root@mymaster1 mysql]#scripts/mysql_install_db --user=mysql --basedir=/data/mysql --datadir=/data/mysql/data
Installing MySQL system tables...2014-06-2716:02:45 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated.Please use --explicit_defaults_for_timestamp server option (see documentationfor more details).
2014-06-27 16:02:45 2134 [Note] InnoDB:Using atomics to ref count buffer pool pages
2014-06-27 16:02:45 2134 [Note] InnoDB: TheInnoDB memory heap is disabled
2014-06-27 16:02:45 2134 [Note] InnoDB:Mutexes and rw_locks use GCC atomic builtins
2014-06-27 16:02:45 2134 [Note] InnoDB:Compressed tables use zlib 1.2.3
2014-06-27 16:02:45 2134 [Note] InnoDB:Using Linux native AIO
2014-06-27 16:02:45 2134 [Note] InnoDB:Using CPU crc32 instructions
2014-06-27 16:02:45 2134 [Note] InnoDB:Initializing buffer pool, size = 128.0M
2014-06-27 16:02:45 2134 [Note] InnoDB:Completed initialization of buffer pool
2014-06-27 16:02:45 2134 [Note] InnoDB: Thefirst specified data file ./ibdata1 did not exist: a new database to becreated!
2014-06-27 16:02:45 2134 [Note] InnoDB:Setting file ./ibdata1 size to 12 MB
2014-06-27 16:02:45 2134 [Note] InnoDB:Database physically writes the file full: wait...
2014-06-27 16:02:45 2134 [Note] InnoDB:Setting log file ./ib_logfile101 size to 48 MB
2014-06-27 16:02:46 2134 [Note] InnoDB:Setting log file ./ib_logfile1 size to 48 MB
2014-06-27 16:02:46 2134 [Note] InnoDB:Renaming log file ./ib_logfile101 to ./ib_logfile0
2014-06-27 16:02:46 2134 [Warning] InnoDB:New log files created, LSN=45781
2014-06-27 16:02:46 2134 [Note] InnoDB:Doublewrite buffer not found: creating new
2014-06-27 16:02:46 2134 [Note] InnoDB:Doublewrite buffer created
2014-06-27 16:02:46 2134 [Note] InnoDB: 128rollback segment(s) are active.
2014-06-27 16:02:46 2134 [Warning] InnoDB:Creating foreign key constraint system tables.
2014-06-27 16:02:46 2134 [Note] InnoDB:Foreign key constraint system tables created
2014-06-27 16:02:46 2134 [Note] InnoDB:Creating tablespace and datafile system tables.
2014-06-27 16:02:46 2134 [Note] InnoDB:Tablespace and datafile system tables created.
2014-06-27 16:02:46 2134 [Note] InnoDB:Waiting for purge to start
2014-06-27 16:02:46 2134 [Note] InnoDB:5.6.19 started; log sequence number 0
2014-06-27 16:02:47 2134 [Note] Binlog end
2014-06-27 16:02:47 2134 [Note] InnoDB: FTSoptimize thread exiting.
2014-06-27 16:02:47 2134 [Note] InnoDB:Starting shutdown...
2014-06-27 16:02:48 2134 [Note] InnoDB:Shutdown completed; log sequence number 1625977
OK
Filling help tables...2014-06-27 16:02:48 0[Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use--explicit_defaults_for_timestamp server option (see documentation for moredetails).
2014-06-27 16:02:48 2157 [Note] InnoDB:Using atomics to ref count buffer pool pages
2014-06-27 16:02:48 2157 [Note] InnoDB: TheInnoDB memory heap is disabled
2014-06-27 16:02:48 2157 [Note] InnoDB:Mutexes and rw_locks use GCC atomic builtins
2014-06-27 16:02:48 2157 [Note] InnoDB:Compressed tables use zlib 1.2.3
2014-06-27 16:02:48 2157 [Note] InnoDB:Using Linux native AIO
2014-06-27 16:02:48 2157 [Note] InnoDB:Using CPU crc32 instructions
2014-06-27 16:02:48 2157 [Note] InnoDB:Initializing buffer pool, size = 128.0M
2014-06-27 16:02:48 2157 [Note] InnoDB:Completed initialization of buffer pool
2014-06-27 16:02:48 2157 [Note] InnoDB:Highest supported file format is Barracuda.
2014-06-27 16:02:48 2157 [Note] InnoDB: 128rollback segment(s) are active.
2014-06-27 16:02:48 2157 [Note] InnoDB:Waiting for purge to start
2014-06-27 16:02:48 2157 [Note] InnoDB:5.6.19 started; log sequence number 1625977
2014-06-27 16:02:48 2157 [Note] Binlog end
2014-06-27 16:02:48 2157 [Note] InnoDB: FTSoptimize thread exiting.
2014-06-27 16:02:48 2157 [Note] InnoDB: Startingshutdown...
2014-06-27 16:02:50 2157 [Note] InnoDB:Shutdown completed; log sequence number 1625987
OK
To start mysqld at boot time you have tocopy
support-files/mysql.server to the rightplace for your system
PLEASE REMEMBER TO SET A PASSWORD FOR THEMySQL root USER !
To do so, start the server, then issue thefollowing commands:
/data/mysql/bin/mysqladmin -u root password 'new-password'
/data/mysql/bin/mysqladmin -u root -h mymaster1.localdomain password'new-password'
Alternatively you can run:
/data/mysql/bin/mysql_secure_installation
which will also give you the option ofremoving the test
databases and anonymous user created bydefault. This is
strongly recommended for productionservers.
See the manual for more instructions.
You can start the MySQL daemon with:
cd. ; /data/mysql/bin/mysqld_safe &
You can test the MySQL daemon withmysql-test-run.pl
cdmysql-test ; perl mysql-test-run.pl
Please report any problems athttp://bugs.mysql.com/
The latest information about MySQL isavailable on the web at
http://www.mysql.com
Support MySQL by buying support/licenses athttp://shop.mysql.com
New default config file was created as/data/mysql/my.cnf and
will be used by default by the server whenyou start it.
You may edit this file to change serversettings
7. 修改相关目录权限,提高安全性:
[root@mymaster1 mysql]# chown -R root .
[root@mymaster1 mysql]# chown -R mysql data
8. 配置MySQL服务为主机服务,即能用service mysql start启动服务
[root@mymaster1 mysql]# cpsupport-files/mysql.server /etc/init.d/mysql
[root@mymaster1 mysql]# vi /etc/init.d/mysql
把下面的
basedir=
datadir=
修改为
basedir=/data/mysql
datadir=/data/mysql/data
9. 启动数据库
[root@mymaster1 mysql]# service mysql start
Starting MySQL[确定]
10. 修改数据库root密码
[root@mymaster1 mysql]#/data/mysql/bin/mysqladmin -u root password 'wengjixi'
[root@mymaster1 mysql]#/data/mysql/bin/mysqladmin -u root -h mymaster1.localdomain password 'wengjixi'
11. 修改环境变量,把mysql执行文件路径添加到环境变量中
[root@mymaster1 mysql]# vi /etc/profile
PATH=$PATH:/data/mysql/bin
export PATH
[root@mymaster1 mysql]# source /etc/profile
12. 测试登录
[root@mymaster1 mysql]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or /g.
Your MySQL connection id is 5
Server version: 5.6.19 MySQL CommunityServer (GPL)
Copyright (c) 2000, 2014, Oracle and/or itsaffiliates. All rights reserved.
Oracle is a registered trademark of OracleCorporation and/or its
affiliates. Other names may be trademarksof their respective
owners.
Type 'help;' or '/h' for help. Type '/c' toclear the current input statement.
mysql>
mysql> show variables like '%data%';
+-------------------------------+------------------------+
| Variable_name | Value |
+-------------------------------+------------------------+
| character_set_database | latin1 |
| collation_database | latin1_swedish_ci |
| datadir | /data/mysql/data/

在數據庫優化中,應根據查詢需求選擇索引策略:1.當查詢涉及多個列且條件順序固定時,使用複合索引;2.當查詢涉及多個列但條件順序不固定時,使用多個單列索引。複合索引適用於優化多列查詢,單列索引則適合單列查詢。

要優化MySQL慢查詢,需使用slowquerylog和performance_schema:1.啟用slowquerylog並設置閾值,記錄慢查詢;2.利用performance_schema分析查詢執行細節,找出性能瓶頸並優化。

MySQL和SQL是開發者必備技能。 1.MySQL是開源的關係型數據庫管理系統,SQL是用於管理和操作數據庫的標準語言。 2.MySQL通過高效的數據存儲和檢索功能支持多種存儲引擎,SQL通過簡單語句完成複雜數據操作。 3.使用示例包括基本查詢和高級查詢,如按條件過濾和排序。 4.常見錯誤包括語法錯誤和性能問題,可通過檢查SQL語句和使用EXPLAIN命令優化。 5.性能優化技巧包括使用索引、避免全表掃描、優化JOIN操作和提升代碼可讀性。

MySQL異步主從復制通過binlog實現數據同步,提升讀性能和高可用性。 1)主服務器記錄變更到binlog;2)從服務器通過I/O線程讀取binlog;3)從服務器的SQL線程應用binlog同步數據。

MySQL是一個開源的關係型數據庫管理系統。 1)創建數據庫和表:使用CREATEDATABASE和CREATETABLE命令。 2)基本操作:INSERT、UPDATE、DELETE和SELECT。 3)高級操作:JOIN、子查詢和事務處理。 4)調試技巧:檢查語法、數據類型和權限。 5)優化建議:使用索引、避免SELECT*和使用事務。

MySQL的安裝和基本操作包括:1.下載並安裝MySQL,設置根用戶密碼;2.使用SQL命令創建數據庫和表,如CREATEDATABASE和CREATETABLE;3.執行CRUD操作,使用INSERT,SELECT,UPDATE,DELETE命令;4.創建索引和存儲過程以優化性能和實現複雜邏輯。通過這些步驟,你可以從零開始構建和管理MySQL數據庫。

InnoDBBufferPool通過將數據和索引頁加載到內存中來提升MySQL數據庫的性能。 1)數據頁加載到BufferPool中,減少磁盤I/O。 2)臟頁被標記並定期刷新到磁盤。 3)LRU算法管理數據頁淘汰。 4)預讀機制提前加載可能需要的數據頁。

MySQL適合初學者使用,因為它安裝簡單、功能強大且易於管理數據。 1.安裝和配置簡單,適用於多種操作系統。 2.支持基本操作如創建數據庫和表、插入、查詢、更新和刪除數據。 3.提供高級功能如JOIN操作和子查詢。 4.可以通過索引、查詢優化和分錶分區來提升性能。 5.支持備份、恢復和安全措施,確保數據的安全和一致性。


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