（转）mysql5.6.7多实例安装、配置的详细讲解分析及shell启动脚本的编写
一、mysql安装
1、下载mysql数据库源码包：
wget http://cdn.mysql.com/Downloads/MySQL-5.6/mysql-5.6.27.tar.gz
2、安装mysql环境安装和运行所依赖的库文件：
[root@mysqldb1 ~]# yum install gcc gcc-c++ ncurses ncurses-devel bison cmake -y
2.1、添加mysql系统用户：
[root@mysqldb1 ~]# useradd mysql -M -r -s /sbin/nologin
3、解压mysql源码包：
[root@mysqldb1 ~]# tar xf mysql-5.6.27.tar.gz
[root@mysqldb1 ~]# ls
anaconda-ks.cfg install.log install.log.syslog mysql-5.6.27 mysql-5.6.27.tar.gz
[root@mysqldb1 ~]# cd mysql-5.6.27
[root@mysqldb1 mysql-5.6.27]# ls
BUILD configure.cmake INSTALL-SOURCE mysql-test scripts tests
BUILD-CMAKE COPYING INSTALL-WIN-SOURCE mysys sql unittest
client dbug libevent mysys_ssl sql-bench VERSION
cmake Docs libmysql packaging sql-common vio
CMakeLists.txt Doxyfile-perfschema libmysqld plugin storage win
cmd-line-utils extra libservices README strings zlib
config.h.cmake include man regex support-files
4、配置mysql安装参数，并生成MakeFile及cmake编译时所需要配置文件文件：
[root@mysqldb1 mysql-5.6.27]# cmake . -DCMAKE_INSTALL_PREFIX=/usr/local/mysql5.6.27 \
-DMYSQL_DATADIR=/usr/local/mysql5.6.27/data \
-DMYSQL_UNIX_ADDR=/usr/local/mysql5.6.27/tmp/mysql.sock \
-DDEFAULT_CHARSET=utf8 \
-DDEFAULT_COLLATION=utf8_general_ci \
-DEXTRA_CHARSETS=gbk,gb2312,utf8,ascii \
-DENABLED_LOCAL_INFILE=ON \
-DWITH_INNOBASE_STORAGE_ENGINE=1 \
-DWITH_FEDERATED_STORAGE_ENGINE=1 \
-DWITH_BLACKHOLE_STORAGE_ENGINE=1 \
-DWITHOUT_EXAMPLE_STORAGE_ENGINE=1 \
-DWITH_FAST_MUTEXES=1 \
-DWITH_ZLIB=bundled \
-DENABLED_LOCAL_INFILE=1 \
-DWITH_READLINE=1 \
-DWITH_EMBEDDED_SERVER=1 \
-DWITH_DEBUG=0
4.1执行cmake后新增或修改过的文件如下所示：
[root@mysqldb1 mysql-5.6.27]# ll | grep root
-rw-r--r--. 1 root root 55401 Oct 18 20:57 CMakeCache.txt
drwxr-xr-x. 12 root root 4096 Oct 18 20:58 CMakeFiles
-rw-r--r--. 1 root root 7421 Oct 18 20:57 cmake_install.cmake
-rw-r--r--. 1 root root 4767 Oct 18 20:57 CPackConfig.cmake
-rw-r--r--. 1 root root 5662 Oct 18 20:57 CPackSourceConfig.cmake
-rw-r--r--. 1 root root 1607 Oct 18 20:57 CTestTestfile.cmake
-rw-r--r--. 1 root root 6628 Oct 18 20:57 info_macros.cmake
-rw-r--r--. 1 root root 6375 Oct 18 20:57 make_dist.cmake
-rw-r--r--. 1 root root 69001 Oct 18 20:57 Makefile
drwxr-xr-x. 2 root root 4096 Oct 18 20:57 source_downloads
-rw-r--r--. 1 root root 88 Oct 18 20:56 VERSION.dep
5、根据cmake生成的配置文件编译及安装mysql数据库
[root@mysqldb1 mysql-5.6.27]# make && make install
…… ……
5.1、除了 CMAKE_INSTALL_PREFIX 之外，CMake 所产生出来的 Makefile 也支援 DESTDIR。有下面两种使用方式：
cmake .
make install DESTDIR="/usr/local/mysql5.6.27"
或
export DESTDIR="/usr/local/mysql5.6.27"
make install
[root@mysqldb1 mysql-5.6.27]# echo $?
0
6、修改mysql配置文件：
[root@mysqldb1 mysql-5.6.27]# cd /usr/local/mysql5.6.27/
[root@mysqldb1 mysql5.6.27]# ls
bin COPYING data docs include INSTALL-BINARY lib man mysql-test README scripts share sql-bench support-files
[root@mysqldb1 mysql5.6.27]# cd support-files/
[root@mysqldb1 support-files]# ls
binary-configure magic my-default.cnf mysqld_multi.server mysql-log-rotate mysql.server
[root@mysqldb1 support-files]# cp my-default.cnf ../my.cnf
[root@mysqldb1 support-files]# cd ..
[root@mysqldb1 mysql5.6.27]# ls
bin COPYING data docs include INSTALL-BINARY lib man my.cnf mysql-test README scripts share sql-bench support-files
[root@mysqldb1 mysql5.6.27]# vim my.cnf
1 # For advice on how to change settings please see
2 # http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html
3 # *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
4 # *** default location during install, and will be replaced if you
5 # *** upgrade to a newer version of MySQL.
6
7 [mysqld]
8
9 # Remove leading # and set to the amount of RAM for the most important data
10 # cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
11 # innodb_buffer_pool_size = 128M
12
13 # Remove leading # to turn on a very important data integrity option: logging
14 # changes to the binary log between backups.
15 # log_bin
16
17 # These are commonly set, remove the # and set as required.
18 # basedir = .....
19 # datadir = .....
20 # port = .....
21 # server_id = .....
22 # socket = .....
23
24 # Remove leading # to set options mainly useful for reporting servers.
25 # The server defaults are faster for transactions and fast SELECTs.
26 # Adjust sizes as needed, experiment to find the optimal values.
27 # join_buffer_size = 128M
28 # sort_buffer_size = 2M
29 # read_rnd_buffer_size = 2M
30
31 sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
把my.cnf中的 18、19、20 改成以下内容：
18 basedir = /usr/local/mysql5.6.27
19 datadir = /usr/local/mysql5.6.27/data
20 port = 3306
7、修改mysql数据目录的用户使用权限：
[root@mysqldb1 mysql5.6.27]# chown mysql.mysql -R data/
8、执行mysql数据库数据字典安装文件脚本：
[root@mysqldb1 mysql5.6.27]# scripts/mysql_install_db --user=mysql --defaults-file=/usr/local/mysql5.6.27/my.cnf
PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
To do so, start the server, then issue the following commands:
#8.1、设置mysql用户的密码：
./bin/mysqladmin -u root password 'new-password'
./bin/mysqladmin -u root -h mysqldb1 password 'new-password'
Alternatively you can run:
#8.2、交互式设置mysql用户的密码：
./bin/mysql_secure_installation
which will also give you the option of removing the test
databases and anonymous user created by default. This is
strongly recommended for production servers.
See the manual for more instructions.
You can start the MySQL daemon with:
#8.3、启动mysql服务器：
cd . ; ./bin/mysqld_safe &
You can test the MySQL daemon with mysql-test-run.pl
#8.4执行mysql脚本测试mysql是否启动成功：
cd mysql-test ; perl mysql-test-run.pl
Please report any problems at http://bugs.mysql.com/
The latest information about MySQL is available on the web at
http://www.mysql.com
Support MySQL by buying support/licenses at http://shop.mysql.com
WARNING: Found existing config file ./my.cnf on the system.
Because this file might be in use, it was not replaced,
but was used in bootstrap (unless you used --defaults-file)
and when you later start the server.
The new default config file was created as ./my-new.cnf,
please compare it with your file and take the changes you need.
WARNING: Default config file /etc/my.cnf exists on the system
This file will be read by default by the MySQL server
If you do not want to use this, either remove it, or use the
--defaults-file argument to mysqld_safe when starting the server
9、启动mysql服务
[root@mysqldb1 mysql5.6.27]# bin/mysqld_safe --defaults-file=/usr/local/mysql5.6.27/my.cnf --user=mysql >/dev/null &
[1] 41074
9.1、测试MySQL服务是否启动
[root@mysqldb1 mysql5.6.27]# lsof -i :3306
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
mysqld 41201 mysql 10u IPv6 100814 0t0 TCP *:mysql (LISTEN)
[root@mysqldb1 mysql5.6.27]# netstat -tulnp | grep 3306
tcp 0 0 :::3306 :::* LISTEN 41201/mysqld
10、设置MySQL用户密码
10.1、交互式设置：
[root@mysqldb1 mysql5.6.27]# ./bin/mysql_secure_installation
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL
SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!
In order to log into MySQL to secure it, we'll need the current
password for the root user. If you've just installed MySQL, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.
Enter current password for root (enter for none):
OK, successfully used password, moving on...
Setting the root password ensures that nobody can log into the MySQL
root user without the proper authorisation.
Set root password? [Y/n] y #是否设置root用户密码
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
... Success!
By default, a MySQL installation has an anonymous user, allowing anyone
to log into MySQL without having to have a user account created for
them. This is intended only for testing, and to make the installation
go a bit smoother. You should remove them before moving into a
production environment.
Remove anonymous users? [Y/n] y #是否删除mysql匿名用户
... Success!
Normally, root should only be allowed to connect from 'localhost'. This
ensures that someone cannot guess at the root password from the network.
Disallow root login remotely? [Y/n] n #是否容许mysql管理员root用户远程登录
... skipping.
By default, MySQL comes with a database named 'test' that anyone can
access. This is also intended only for testing, and should be removed
before moving into a production environment.
Remove test database and access to it? [Y/n] y #是否移除test数据库
- Dropping test database...
... Success!
- Removing privileges on test database...
... Success!
Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.
Reload privilege tables now? [Y/n] y #是否重新加载权限表，相当于flush privileges;
... Success!
All done! If you've completed all of the above steps, your MySQL
installation should now be secure.
Thanks for using MySQL!
Cleaning up...
10.2、用非交互式命令mysqladmin管理工具修改密码
[root@mysqldb1 mysql5.6.27]# ./bin/mysqladmin -u root -p123456 password '654321'
Warning: Using a password on the command line interface can be insecure.
11、把mysql的相关命令添加到环境变量里：
[root@mysqldb1 mysql5.6.27]# echo PATH=/usr/local/mysql5.6.27/bin/:$PATH >> /etc/profile
[root@mysqldb1 mysql5.6.27]# source /etc/profile
12、用mysql客户端命令登录mysql服务器
[root@mysqldb1 mysql5.6.27]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 13
Server version: 5.6.27 Source distribution
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show databases; #显示root用户可以管理的数据库管理系统中有数据库
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
+--------------------+
3 rows in set (0.08 sec)
mysql> use mysql; #切换进入mysql数据库
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> show tables; #查看mysql数据库中有多少数据表文件
+---------------------------+
| Tables_in_mysql |
+---------------------------+
| columns_priv |
| db |
| event |
| func |
| general_log |
| help_category |
| help_keyword |
| help_relation |
| help_topic |
| innodb_index_stats |
| innodb_table_stats |
| ndb_binlog_index |
| plugin |
| proc |
| procs_priv |
| proxies_priv |
| servers |
| slave_master_info |
| slave_relay_log_info |
| slave_worker_info |
| slow_log |
| tables_priv |
| time_zone |
| time_zone_leap_second |
| time_zone_name |
| time_zone_transition |
| time_zone_transition_type |
| user |
+---------------------------+
28 rows in set (0.00 sec)
mysql> select host,user,password from user; #查看数据库的中用户
+-----------+------+-------------------------------------------+
| host | user | password |
+-----------+------+-------------------------------------------+
| localhost | root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| mysqldb1 | root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| 127.0.0.1 | root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| ::1 | root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
+-----------+------+-------------------------------------------+
4 rows in set (0.00 sec)
13、制作开机自启动服务：
13.1、#把安装路劲下的support-files/mysql.server文件到改名为/etc/init.d/mysqld
[root@mysqldb1 mysql5.6.27]# cd support-files/
[root@mysqldb1 support-files]# cp mysql.server /etc/init.d/mysqld
13.2、查看mysqld是否具有执行权限：
[root@mysqldb1 support-files]# ll /etc/init.d/mysqld
-rwxr-xr-x. 1 root root 10916 Oct 18 23:04 /etc/init.d/mysqld
13.3、给mysql服务添加开机自启动：
[root@mysqldb1 support-files]# chkconfig --add mysqld
13.4、查看mysql服务运行级别：
[root@mysqldb1 support-files]# chkconfig --list mysqld
mysqld 0:off 1:off 2:on 3:on 4:on 5:on 6:off
13.5、修改mysql运行级别：
[root@mysqldb1 support-files]# chkconfig --level 24 mysqld off
[root@mysqldb1 support-files]# chkconfig --list mysqld
mysqld 0:off 1:off 2:off 3:on 4:off 5:on 6:off
13.6、返回上级目录并把目录下mysql配置文件my.cnf复制到 /etc目录下，并重新启动mysql服务：
[root@mysqldb1 support-files]# cd ..
[root@mysqldb1 mysql5.6.27]# cp my.cnf /etc/my.cnf
cp: overwrite `/etc/my.cnf'? y
[root@mysqldb1 mysql5.6.27]# service mysqld restart #重启mysql服务
Shutting down MySQL.. [ OK ]
Starting MySQL.. [ OK ]
[1]+ Done bin/mysqld_safe --defaults-file=/usr/local/mysql5.6.27/my.cnf --user=mysql > /dev/null
14、用管理员账户登录mysql并修改mysql用户密码：
这种方式必须是先用root帐户登入mysql，然后执行：
mysql> use mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> UPDATE user SET password=PASSWORD('123456') WHERE user='root';
Query OK, 1 row affected (0.00 sec)
Rows matched: 4 Changed: 1 Warnings: 0
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> select user,host,password from user;
+------+-----------+-------------------------------------------+
| user | host | password |
+------+-----------+-------------------------------------------+
| root | localhost | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| root | mysqldb1 | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| root | 127.0.0.1 | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
| root | ::1 | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
+------+-----------+-------------------------------------------+
4 rows in set (0.00 sec)
二、mysql多实例实现：
1、mysql多实例的原理
mysql多实例，简单的说，就是在一台服务器上开启多个不同的mysql服务端口（如3306，3307），运行多个mysql服务进程。这些服务进程通过不同的socket监听不同的服务端口，来提供各自的服务。
这些mysql实例共用一套mysql安装程序，使用不同的my.cnf配置文件、启动程序、数据文件。在提供服务时，mysql多实例在逻辑上看来是各自独立的，各个实例之间根据配置文件的设定值，来取得服务器的相关硬件资源。
2、mysql多实例的特点
2.1 有效的利用服务器资源
当单个服务器资源有剩余时，可以充分利用剩余的服务器资源来提供更多的服务。
2.2 节约服务器资源
当公司资金紧张，但是数据库需要各自提供独立服务，而且需要主从同步等技术时，使用多实例就最好了。
2.3 出现资源互相抢占问题
当某个实例服务并发很高或者有慢查询时，会消耗服务器更多的内存、CPU、磁盘IO等资源，这时就会导致服务器上的其它实例提供访问的质量下降，出现服务器资源互相抢占的现象。
3、mysql多实例应用场景
3.1 资金紧张型公司的选择
当公司业务访问量不太大，又舍不得花钱，但同时又希望不同业务的数据库服务各自独立，而且需要主从同步进行等技术提供备份或读写分离服务时，使用多实例是最好不过的。
3.2 并发访问不是特别大的业务
当公司业务访问量不太大，服务器资源基本闲置的比较多，这是就很适合多实例的应用。如果对SQL语句优化的好，多实例是一个很值得使用的技术。即使并发很大，只要合理分配好系统资源，也不会有太大问题。
4、mysql5.5多实例部署方法
4.1 mysql5.5多实例部署方法
mysql5.5多实例部署方法一个是通过多个配置文件启动多个不同进程的方法，第二个是使用官方自带的mysqld_multi来实现。
第一种方法我们可以把各个实例的配置文件分开，管理比较方便。第二种方法就是把多个实例都放到一个配置文件中，这个管理不是很方便。所以在此我们选择第一种方法，而且以下实验我们全部是在此方法下进行的。
4.2 mysql5.5的安装及配置
要配置mysql5.5多实例，我们首先要安装mysql5.5，mysql5.5安装完毕后，我们不要启动mysql，因为此时mysql是单实例的。
5、使用多个配置文件启动多个不同进程：
这种架构是使用多个配置文件启动不同的进程来实现多实例，这种方式的优势逻辑简单，配置简单，缺点是管理起来不太方便，但相对独立，使mysql的耦合度降低了许多。
[root@mysqldb1 mysql]# mkdir -p /mysqldata/330{6,7,8}/
5.1、配置端口号为3306的mysql实例
5.1.1、配置3306的my.cnf文件
[root@mysqldb1 mysql5.6.27]# vim /mysqldata/3306/my.cnf
[client]
port = 3306
socket = /mysqldata/3306/mysql.sock
[mysqld]
datadir=/mysqldata/3306/
skip-name-resolve
lower_case_table_names=1
innodb_file_per_table=1
port = 3306
socket = /mysqldata/3306/mysql.sock
back_log = 50
max_connections = 300
max_connect_errors = 1000
table_open_cache = 2048
max_allowed_packet = 16M
binlog_cache_size = 2M
max_heap_table_size = 32M
sort_buffer_size = 2M
join_buffer_size = 2M
thread_cache_size = 64
thread_concurrency = 8
query_cache_size = 64M
query_cache_limit = 2M
ft_min_word_len = 4
default-storage-engine = innodb
thread_stack = 192K
transaction_isolation = REPEATABLE-READ
tmp_table_size = 32M
log-bin=mysql-bin
binlog_format=mixed
slow_query_log
long_query_time = 1
server-id = 1
key_buffer_size = 8M
read_buffer_size = 2M
read_rnd_buffer_size = 2M
bulk_insert_buffer_size = 32M
myisam_sort_buffer_size = 64M
myisam_max_sort_file_size = 10G
myisam_repair_threads = 1
myisam_recover
innodb_additional_mem_pool_size = 8M
innodb_buffer_pool_size = 100M
innodb_data_file_path = ibdata1:10M:autoextend
innodb_file_io_threads = 8
innodb_thread_concurrency = 16
innodb_flush_log_at_trx_commit = 1
innodb_log_buffer_size = 8M
innodb_log_file_size = 256M
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 60
innodb_lock_wait_timeout = 120
[mysqldump]
quick
max_allowed_packet = 128M
[mysql]
no-auto-rehash
prompt=\\u@\\d \\R:\\m>
[myisamchk]
key_buffer_size = 256M
sort_buffer_size = 256M
read_buffer = 8M
write_buffer = 8M
[mysqlhotcopy]
interactive-timeout
[mysqld_safe]
open-files-limit = 1024
5.1.2、启动端口号为3306的实例并设置密码：
#安装端口号为3306的mysql实例：
[root@mysqldb1 mysql5.6.27]# /usr/local/mysql5.6.27/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql5.6.27 --datadir=/mysqldata/3306 --defaults-file=/mysqldata/3306/my.cnf
#启动端口号为3306的mysql实例：
[root@mysqldb1 mysqldata]# /usr/local/mysql5.6.27/bin/mysqld_safe --defaults-file=/mysqldata/3306/my.cnf 2>&1 > /dev/null &
[2] 5846
#给端口号为3306的mysql实例设置密码：
[root@mysqldb1 mysql5.6.27]# /usr/local/mysql5.6.27/bin/mysqladmin -uroot password '123456' -S /mysqldata/3306/mysql.sock
Warning: Using a password on the command line interface can be insecure.
#登陆端口号为3306的mysql实例服务器：
[root@mysqldb1 mysql5.6.27]# mysql -uroot -p123456 -S /mysqldata/3306/mysql.sock
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.6.27-log Source distribution
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
5.1.3设置mysql的脚本启动文件：
[root@mysqldb1 mysql5.6.27]# vim /mysqldata/3306/mysqld
#!/bin/bash
mysql_port=3306
mysql_username="root"
mysql_password="123456"
function_start_mysql()
{
printf "Starting MySQL...\n"
/bin/sh /usr/local/mysql5.6.27/bin/mysqld_safe --defaults-file=/mysqldata/${mysql_port}/my.cnf 2>&1 > /dev/null &
}
function_stop_mysql()
{
printf "Stoping MySQL...\n"
/usr/local/mysql5.6.27/bin/mysqladmin -u ${mysql_username} -p${mysql_password} -S /mysqldata/${mysql_port}/mysql.sock shutdown
}
function_restart_mysql()
{
printf "Restarting MySQL...\n"
function_stop_mysql
function_start_mysql
}
function_kill_mysql()
{
kill -9 $(ps -ef | grep 'bin/mysqld_safe' | grep ${mysql_port} | awk '{printf $2}')
kill -9 $(ps -ef | grep 'libexec/mysqld' | grep ${mysql_port} | awk '{printf $2}')
}
case $1 in
start)
function_start_mysql;;
stop)
function_stop_mysql;;
kill)
function_kill_mysql;;
restart)
function_stop_mysql
function_start_mysql;;
*)
echo "Usage: /mysqldata/${mysql_port}/mysqld {start|stop|restart|kill}";;
esac
5.1.4、测试启动进程：
#启动端口号为3306的mysql
[root@mysqldb1 mysql5.6.27]# /mysqldata/3306/mysqld start
Starting MySQL...
[root@mysqldb1 mysql5.6.27]# netstat -tulnp | grep 3306
tcp 0 0 :::3306 :::* LISTEN 46977/mysqld
#重启端口号为3306的mysql
[root@mysqldb1 mysql5.6.27]# /mysqldata/3306/mysqld restart
Stoping MySQL...
Warning: Using a password on the command line interface can be insecure.
Starting MySQL...
[root@mysqldb1 mysql5.6.27]# netstat -tulnp | grep 3306
tcp 0 0 :::3306 :::* LISTEN 47669/mysqld
#停止端口号为3306的mysql
[root@mysqldb1 mysql5.6.27]# /mysqldata/3306/mysqld stop
Stoping MySQL...
Warning: Using a password on the command line interface can be insecure.
[root@mysqldb1 mysql5.6.27]# netstat -tulnp | grep 3306
5.2、配置端口号为3307、3308的mysql实例：
5.2.1、复制目录/mysqldata/3306下的配置文件my.cnf和启动脚本分别到 /mysqldata/3307 和 /mysqldata/3308 目录下
[root@mysqldb1 mysqldata]# cd /mysqldata/3306
[root@mysqldb1 3306]# cp my.cnf mysqld ../3307/
[root@mysqldb1 3306]# cp my.cnf mysqld ../3308/
5.2.3、分别修改端口号为3307、3308的配置文件和启动文件
[root@mysqldb1 3307]# cd ../3308
[root@mysqldb1 3308]# sed -i 's/3306/3308/g' mysqld
[root@mysqldb1 3308]# sed -i 's/3306/3308/g' my.cnf
[root@mysqldb1 3308]# sed -i 's/3306/3307/g' ../3307/my.cnf
[root@mysqldb1 3308]# sed -i 's/3306/3307/g' ../3307/mysqld
5.2.4、分别安装端口号为3307、3308的mysql实例数据库
#初始化端口号为3307的实例数据库：
[root@mysqldb1 3308]# /usr/local/mysql5.6.27/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql5.6.27 --datadir=/mysqldata/3307 --defaults-file=/mysqldata/3307/my.cnf
#初始化端口号为3308的实例数据库：
[root@mysqldb1 3308]# /usr/local/mysql5.6.27/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql5.6.27 --datadir=/mysqldata/3308 --defaults-file=/mysqldata/3308/my.cnf
5.2.5、分别启动端口号为3307、3308的mysql实例数据库
#启动端口号为3307的实例：
[root@mysqldb1 3308]# /usr/local/mysql5.6.27/bin/mysqld_safe --defaults-file=/mysqldata/3307/my.cnf 2>&1 >/dev/null &
[1] 47969
#启动端口号为3308的实例：
[root@mysqldb1 3308]# /usr/local/mysql5.6.27/bin/mysqld_safe --defaults-file=/mysqldata/3308/my.cnf 2>&1 >/dev/null &
[2] 48654
#查看mysql实例的启动情况：
[root@mysqldb1 3308]# netstat -tulnp | grep 330
tcp 0 0 :::3307 :::* LISTEN 48632/mysqld
tcp 0 0 :::3308 :::* LISTEN 49317/mysqld
5.2.6、分别修改端口号为3307、3308的mysql实例的管理员密码
#修改端口号为3307实例的管理员root用户的密码：
[root@mysqldb1 3308]# /usr/local/mysql5.6.27/bin/mysqladmin -uroot password '123456' -S /mysqldata/3307/mysql.sock
Warning: Using a password on the command line interface can be insecure.
#修改端口号为3308实例的管理员root用户的密码：
[root@mysqldb1 3308]# /usr/local/mysql5.6.27/bin/mysqladmin -uroot password '123456' -S /mysqldata/3308/mysql.sock
Warning: Using a password on the command line interface can be insecure.
5.2.7、分别使用mysql客户端登陆命令登陆端口号为3307、3308的mysql实例服务器
#登陆端口号为3307的mysql实例服务器：
[root@mysqldb1 3308]# mysql -uroot -p123456 -S /mysqldata/3307/mysql.sock
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.6.27-log Source distribution
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
4 rows in set (0.00 sec)
#在端口号为3307的mysql实例中登陆端口号为3308的mysql实例服务器：
mysql> system mysql -uroot -p123456 -S /mysqldata/3308/mysql.sock
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.6.27-log Source distribution
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
4 rows in set (0.00 sec)
mysql> quit
Bye
mysql> quit
Bye
5.2.8、分别使用mysql启动脚本测试端口号为3307、3308的mysql实例服务器
5.2.8.1、杀掉刚刚启动的mysql多例进程：
[root@mysqldb1 3308]# pkill mysqld
[root@mysqldb1 3308]# netstat -tulnp | grep 330
[1]- Done /usr/local/mysql5.6.27/bin/mysqld_safe --defaults-file=/mysqldata/3307/my.cnf 2>&1 > /dev/null
[2]+ Done /usr/local/mysql5.6.27/bin/mysqld_safe --defaults-file=/mysqldata/3308/my.cnf 2>&1 > /dev/null
[root@mysqldb1 3308]# netstat -tulnp | grep 330
5.2.8.2、测试端口号为3307的服务器登陆脚本：
#启动端口号为3307的mysql
[root@mysqldb1 3308]# /mysqldata/3307/mysqld start
Starting MySQL...
[root@mysqldb1 3308]# netstat -tulnp | grep 3307
tcp 0 0 :::3307 :::* LISTEN 50710/mysqld
#重启端口号为3307的mysql
[root@mysqldb1 3308]# /mysqldata/3307/mysqld restart
Stoping MySQL...
Warning: Using a password on the command line interface can be insecure.
Starting MySQL...
[root@mysqldb1 3308]# netstat -tulnp | grep 3307
tcp 0 0 :::3307 :::* LISTEN 51403/mysqld
#停止端口号为3307的mysql
[root@mysqldb1 3308]# /mysqldata/3307/mysqld stop
Stoping MySQL...
Warning: Using a password on the command line interface can be insecure.
[root@mysqldb1 3308]# netstat -tulnp | grep 3307
5.2.8.3、测试端口号为3308的服务器登陆脚本：
#启动端口号为3308的mysql
[root@mysqldb1 3308]# /mysqldata/3308/mysqld start
Starting MySQL...
[root@mysqldb1 3308]# netstat -tulnp | grep 3308
tcp 0 0 :::3308 :::* LISTEN 52104/mysqld
#重启端口号为3308的mysql
[root@mysqldb1 3308]# netstat -tulnp | grep 3308
tcp 0 0 :::3308 :::* LISTEN 52104/mysqld
[root@mysqldb1 3308]# /mysqldata/3308/mysqld restart
Stoping MySQL...
Warning: Using a password on the command line interface can be insecure.
Starting MySQL...
[root@mysqldb1 3308]# netstat -tulnp | grep 3308
tcp 0 0 :::3308 :::* LISTEN 52797/mysqld
#停止端口号为3308的mysql
[root@mysqldb1 3308]# /mysqldata/3308/mysqld stop
Stoping MySQL...
Warning: Using a password on the command line interface can be insecure.
[root@mysqldb1 3308]# netstat -tulnp | grep 3308
5.2.9、分别启动端口号为3306、3307、3308的实例
[root@mysqldb1 ~]# for mport in 3306 3307 3308 ; do /mysqldata/$mport/mysqld start;done
Starting MySQL...
Starting MySQL...
Starting MySQL...
[root@mysqldb1 ~]# netstat -tulnp | grep 330
tcp 0 0 :::3307 :::* LISTEN 12459/mysqld
tcp 0 0 :::3308 :::* LISTEN 12441/mysqld
tcp 0 0 :::3306 :::* LISTEN 12460/mysqld
5.2.10、分别重启端口号为3306、3307、3308的实例
[root@mysqldb1 ~]# for mport in 3306 3307 3308 ; do /mysqldata/$mport/mysqld restart; sleep 1 ;done
Stoping MySQL...
Warning: Using a password on the command line interface can be insecure.
Starting MySQL...
Stoping MySQL...
Warning: Using a password on the command line interface can be insecure.
Starting MySQL...
Stoping MySQL...
Warning: Using a password on the command line interface can be insecure.
Starting MySQL...
[root@mysqldb1 ~]# netstat -tulnp | grep 330
tcp 0 0 :::3307 :::* LISTEN 12884/mysqld
tcp 0 0 :::3308 :::* LISTEN 13070/mysqld
5.2.11、分别停止端口号为3306、3307、3308的实例
[root@mysqldb1 ~]# for mport in 3306 3307 3308 ; do /mysqldata/$mport/mysqld stop; sleep 1 ;done
Stoping MySQL...
Warning: Using a password on the command line interface can be insecure.
Stoping MySQL...
Warning: Using a password on the command line interface can be insecure.
Stoping MySQL...
Warning: Using a password on the command line interface can be insecure.
[root@mysqldb1 ~]# netstat -tulnp | grep 330
6、第二种通过官方自带的mysqld_multi来实现多实例实战
6.1、创建目录
[root@mysqldb1 ~]# /mysqlmulti/330{6,7,8}/
[root@mysqldb1 ~]# /mysqldata/
[root@mysqldb1 mysqlmulti]# mkdir conf
6.2、编辑配置文件
[root@mysqldb1 mysqlmulti]# vim conf/my.cnf
[mysqld_multi]
mysqld = /usr/local/mysql5.6.27/bin/mysqld_safe
mysqladmin = /usr/local/mysql5.6.27/bin/mysqladmin
user = root
password = 123456
[mysqld1]
socket = /mysqlmulti/3306/mysql.sock
port = 3306
pid-file = /mysqlmulti/3306/mysql3306.pid
datadir = /mysqlmulti/3306
user = mysql
skip-name-resolve
lower_case_table_names=1
innodb_file_per_table=1
back_log = 50
max_connections = 300
max_connect_errors = 1000
table_open_cache = 2048
max_allowed_packet = 16M
binlog_cache_size = 2M
max_heap_table_size = 64M
sort_buffer_size = 2M
join_buffer_size = 2M
thread_cache_size = 64
thread_concurrency = 8
query_cache_size = 64M
query_cache_limit = 2M
ft_min_word_len = 4
default-storage-engine = innodb
thread_stack = 192K
transaction_isolation = REPEATABLE-READ
tmp_table_size = 64M
log-bin=mysql-bin
binlog_format=mixed
slow_query_log
long_query_time = 1
server-id = 1
key_buffer_size = 8M
read_buffer_size = 2M
read_rnd_buffer_size = 2M
bulk_insert_buffer_size = 64M
myisam_sort_buffer_size = 128M
myisam_max_sort_file_size = 10G
myisam_repair_threads = 1
myisam_recover
innodb_additional_mem_pool_size = 16M
innodb_buffer_pool_size = 200M
innodb_data_file_path = ibdata1:10M:autoextend
innodb_file_io_threads = 8
innodb_thread_concurrency = 16
innodb_flush_log_at_trx_commit = 1
innodb_log_buffer_size = 16M
innodb_log_file_size = 512M
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 60
innodb_lock_wait_timeout = 120
[mysqld2]
socket = /mysqlmulti/3307/mysql.sock
port = 3307
pid-file = /mysqlmulti/3307/mysql3307.pid
datadir = /mysqlmulti/3307
user = mysql
skip-name-resolve
lower_case_table_names=1
innodb_file_per_table=1
back_log = 50
max_connections = 300
max_connect_errors = 1000
table_open_cache = 2048
max_allowed_packet = 16M
binlog_cache_size = 2M
max_heap_table_size = 64M
sort_buffer_size = 2M
join_buffer_size = 2M
thread_cache_size = 64
thread_concurrency = 8
query_cache_size = 64M
query_cache_limit = 2M
ft_min_word_len = 4
default-storage-engine = innodb
thread_stack = 192K
transaction_isolation = REPEATABLE-READ
tmp_table_size = 64M
log-bin=mysql-bin
binlog_format=mixed
slow_query_log
long_query_time = 1
server-id = 1
key_buffer_size = 8M
read_buffer_size = 2M
read_rnd_buffer_size = 2M
bulk_insert_buffer_size = 64M
myisam_sort_buffer_size = 128M
myisam_max_sort_file_size = 10G
myisam_repair_threads = 1
myisam_recover
innodb_additional_mem_pool_size = 16M
innodb_buffer_pool_size = 200M
innodb_data_file_path = ibdata1:10M:autoextend
innodb_file_io_threads = 8
innodb_thread_concurrency = 16
innodb_flush_log_at_trx_commit = 1
innodb_log_buffer_size = 16M
innodb_log_file_size = 512M
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 60
innodb_lock_wait_timeout = 120
[mysqld3]
socket = /mysqlmulti/3308/mysql.sock
port = 3308
pid-file = /mysqlmulti/3308/mysql3308.pid
datadir = /mysqlmulti/3308
user = mysql
skip-name-resolve
lower_case_table_names=1
innodb_file_per_table=1
back_log = 50
max_connections = 300
max_connect_errors = 1000
table_open_cache = 2048
max_allowed_packet = 16M
binlog_cache_size = 2M
max_heap_table_size = 64M
sort_buffer_size = 2M
join_buffer_size = 2M
thread_cache_size = 64
thread_concurrency = 8
query_cache_size = 64M
query_cache_limit = 2M
ft_min_word_len = 4
default-storage-engine = innodb
thread_stack = 192K
transaction_isolation = REPEATABLE-READ
tmp_table_size = 64M
log-bin=mysql-bin
binlog_format=mixed
slow_query_log
long_query_time = 1
server-id = 1
key_buffer_size = 8M
read_buffer_size = 2M
read_rnd_buffer_size = 2M
bulk_insert_buffer_size = 64M
myisam_sort_buffer_size = 128M
myisam_max_sort_file_size = 10G
myisam_repair_threads = 1
myisam_recover
innodb_additional_mem_pool_size = 16M
innodb_buffer_pool_size = 200M
innodb_data_file_path = ibdata1:10M:autoextend
innodb_file_io_threads = 8
innodb_thread_concurrency = 16
innodb_flush_log_at_trx_commit = 1
innodb_log_buffer_size = 16M
innodb_log_file_size = 512M
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 60
innodb_lock_wait_timeout = 120
[mysqldump]
quick
max_allowed_packet = 256M
[mysql]
no-auto-rehash
prompt=\\u@\\d \\R:\\m>
[myisamchk]
key_buffer_size = 512M
sort_buffer_size = 512M
read_buffer = 8M
write_buffer = 8M
[mysqlhotcopy]
interactive-timeout
[mysqld_safe]
open-files-limit = 8192
6.3、初始化端口为3306、3307、3308的mysql数据库
[root@mysqldb1 mysqlmulti]# /usr/local/mysql5.6.27/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql5.6.27 --datadir=/mysqlmulti/3306
[root@mysqldb1 mysqlmulti]# /usr/local/mysql5.6.27/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql5.6.27 --datadir=/mysqlmulti/3307
[root@mysqldb1 mysqlmulti]# /usr/local/mysql5.6.27/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql5.6.27 --datadir=/mysqlmulti/3308
6.4、启动测试启动多实例数据库
[root@mysqldb1 mysqlmulti]# /usr/local/mysql5.6.27/bin/mysqld_multi --defaults-file=/mysqlmulti/conf/my.cnf --user=mysql start 1-3
[root@mysqldb1 mysqlmulti]# netstat -tulnp | grep 330
tcp 0 0 :::3307 :::* LISTEN 47763/mysqld
tcp 0 0 :::3308 :::* LISTEN 47699/mysqld
tcp 0 0 :::3306 :::* LISTEN 47764/mysqld
6.5、停止mysql多实例数据库
[root@mysqldb1 mysqlmulti]# pkill mysql
[root@mysqldb1 mysqlmulti]# netstat -tulnp | grep 330
6.6、编写启动、停止、重启的控制脚本
[root@mysqldb1 mysqlmulti]# vim mysqld_multi
#!/bin/bash
basedir=/usr/local/mysql5.6.27
bindir=/usr/local/mysql5.6.27/bin
cfgfile=/mysqlmulti/conf/my.cnf
if test -x $bindir/mysqld_multi
then
my_multi="$bindir/mysqld_multi";
else
echo "Can't execute $bindir/mysqld_multi from dir $basedir";
exit;
fi
echo $my_multi
function startmulti(){
echo "Starting multi mysqld ......"
"$my_multi" --defaults-file=$cfgfile start $2
sleep 5
echo "Started multi mysqld ......"
}
function stopmulti(){
echo "Stopping multi mysqld ......"
ps -ef | /bin/grep /bin/mysqld | /bin/grep -v grep | /bin/awk '{print $2}' | /usr/bin/xargs kill -s 9
echo "Stopped multi mysqld ......"
}
function restartmulti(){
stopmulti
startmulti $2
}
case "$1" in
'start' )
startmulti $2
;;
'stop' )
stopmulti
;;
'restart' )
restartmulti $2
;;
*)
echo "Usage: $0 {start|stop|restart}" >&2
;;
esac
6.7、给启动脚本授可执行权限
[root@mysqldb1 mysqlmulti]# chmod +x mysqld_multi
[root@mysqldb1 mysqlmulti]# ll ./
total 20
drwxr-xr-x. 5 mysql mysql 4096 Oct 19 11:42 3306
drwxr-xr-x. 5 mysql mysql 4096 Oct 19 11:42 3307
drwxr-xr-x. 5 mysql mysql 4096 Oct 19 11:42 3308
drwxr-xr-x. 2 root root 4096 Oct 19 09:34 conf
-rwxr-xr-x. 1 root root 888 Oct 19 11:43 mysqld_multi
6.8、测试脚本是否正常
6.8.1、启动mysql多个实例
[root@mysqldb1 mysqlmulti]# ./mysqld_multi start 1-3
/usr/local/mysql5.6.27/bin/mysqld_multi
Starting multi mysqld ......
Started multi mysqld ......
[root@mysqldb1 mysqlmulti]# netstat -tlnpu | grep 330
tcp 0 0 :::3307 :::* LISTEN 5127/mysqld
tcp 0 0 :::3308 :::* LISTEN 5126/mysqld
tcp 0 0 :::3306 :::* LISTEN 5102/mysqld
6.8.2、重启mysql多个实例
[root@mysqldb1 mysqlmulti]# ./mysqld_multi restart 1-3
/usr/local/mysql5.6.27/bin/mysqld_multi
Stopping multi mysqld ......
Stopped multi mysqld ......
Starting multi mysqld ......
Started multi mysqld ......
[root@mysqldb1 mysqlmulti]# netstat -tlnpu | grep 330
tcp 0 0 :::3307 :::* LISTEN 7993/mysqld
tcp 0 0 :::3308 :::* LISTEN 7999/mysqld
tcp 0 0 :::3306 :::* LISTEN 7959/mysqld
6.8.3、关闭mysql实例
[root@mysqldb1 mysqlmulti]# ./mysqld_multi stop
/usr/local/mysql5.6.27/bin/mysqld_multi
Stopping multi mysqld ......
Stopped multi mysqld ......
[root@mysqldb1 mysqlmulti]# netstat -tlnpu | grep 330
6.8.4、单配置文件mysql用户密码密码：
1、启动mysql多实例
[root@mysqldb1 ~]# /mysqlmulti/mysqld_multi start 1-3
2、修改每个实例的管理员密码
[root@mysqldb1 ~]# for mport in 3306 3307 3308 ; do /usr/local/mysql5.6.27/bin/mysqladmin -uroot password '123456' -S /mysqlmulti/$mport/mysql.sock ; done
Warning: Using a password on the command line interface can be insecure.
Warning: Using a password on the command line interface can be insecure.
Warning: Using a password on the command line interface can be insecure.
3、使用命令登陆mysql各个实例进程
#使用命令登陆端口号为3306的mysql实例
[root@mysqldb1 ~]# mysql -uroot -p123456 -S /mysqlmulti/3306/mysql.sock
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.6.27-log Source distribution
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
#查看端口号为3306的mysql实例的状态信息。
mysql> status
--------------
mysql Ver 14.14 Distrib 5.6.27, for Linux (x86_64) using EditLine wrapper
Connection id: 5
Current database:
Current user: root@localhost
SSL: Not in use
Current pager: stdout
Using outfile: ''
Using delimiter: ;
Server version: 5.6.27-log Source distribution
Protocol version: 10
Connection: Localhost via UNIX socket
Server characterset: utf8
Db characterset: utf8
Client characterset: utf8
Conn. characterset: utf8
UNIX socket: /mysqlmulti/3306/mysql.sock
Uptime: 13 min 27 sec
Threads: 1 Questions: 47 Slow queries: 0 Opens: 87 Flush tables: 1 Open tables: 80 Queries per second avg: 0.058
--------------
#在端口号为3306的mysql实例中登陆端口号为3307的mysql实例服务器，其中system是在不离开mysql服务器的同时能够执行linux外部命令的函数。
mysql> system mysql -uroot -p123456 -S /mysqlmulti/3307/mysql.sock
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.6.27-log Source distribution
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
#端口号为3307的mysql实例的状态信息。
mysql> status
--------------
mysql Ver 14.14 Distrib 5.6.27, for Linux (x86_64) using EditLine wrapper
Connection id: 3
Current database:
Current user: root@localhost
SSL: Not in use
Current pager: stdout
Using outfile: ''
Using delimiter: ;
Server version: 5.6.27-log Source distribution
Protocol version: 10
Connection: Localhost via UNIX socket
Server characterset: utf8
Db characterset: utf8
Client characterset: utf8
Conn. characterset: utf8
UNIX socket: /mysqlmulti/3307/mysql.sock
Uptime: 14 min 25 sec
Threads: 1 Questions: 16 Slow queries: 0 Opens: 70 Flush tables: 1 Open tables: 63 Queries per second avg: 0.018
--------------
#登陆端口号为3308的mysql实例
mysql> system mysql -uroot -p123456 -S /mysqlmulti/3308/mysql.sock
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.27-log Source distribution
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
#端口号为3307的mysql实例的状态信息。
mysql> status
--------------
mysql Ver 14.14 Distrib 5.6.27, for Linux (x86_64) using EditLine wrapper
Connection id: 2
Current database:
Current user: root@localhost
SSL: Not in use
Current pager: stdout
Using outfile: ''
Using delimiter: ;
Server version: 5.6.27-log Source distribution
Protocol version: 10
Connection: Localhost via UNIX socket
Server characterset: utf8
Db characterset: utf8
Client characterset: utf8
Conn. characterset: utf8
UNIX socket: /mysqlmulti/3308/mysql.sock
Uptime: 15 min 5 sec
Threads: 1 Questions: 10 Slow queries: 0 Opens: 70 Flush tables: 1 Open tables: 63 Queries per second avg: 0.011
--------------
#逐级退出mysql客户端实例
mysql> quit
Bye
mysql> quit
Bye
mysql> quit
Bye
mysqladmin 优雅关闭mysql
本文出自 “放牛娃” 博客，请务必保留此出处http://fangniuwa.blog.51cto.com/10209030/1757998
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