11、修改my.cnf文件
#vi /etc/my.cnf
将下面内容复制替换当前的my.cnf文件中的内容
[client]
no-beep
socket=/software/mysql/mysql.sock
# pipe
# socket=0.0
port=3306
[mysql]
default-character-set=utf8
[mysqld]
basedir=/software/mysql
datadir=/data/mysql
port=3306
pid-file=/software/mysql/mysqld.pid
#skip-grant-tables
skip-name-resolve
socket=/software/mysql/mysql.sock
character-set-server=utf8
default-storage-engine=INNODB
explicit_defaults_for_timestamp=true
# Server Id.
server-id=1
max_connections=2000
query_cache_size=0
table_open_cache=2000
tmp_table_size=246M
thread_cache_size=300
#限定用于每个数据库线程的栈大小。默认设置足以满足大多数应用
thread_stack=192k
key_buffer_size=512M
read_buffer_size=4M
read_rnd_buffer_size=32M
innodb_data_home_dir=/data/mysql
innodb_flush_log_at_trx_commit=0
innodb_log_buffer_size=16M
innodb_buffer_pool_size=256M
innodb_log_file_size=128M
innodb_thread_concurrency=128
innodb_autoextend_increment=1000
innodb_buffer_pool_instances=8
innodb_concurrency_tickets=5000
innodb_old_blocks_time=1000
innodb_open_files=300
innodb_stats_on_metadata=0
innodb_file_per_table=1
innodb_checksum_algorithm=0
back_log=80
flush_time=0
join_buffer_size=128M
max_allowed_packet=1024M
max_connect_errors=2000
open_files_limit=4161
query_cache_type=0
sort_buffer_size=32M
table_definition_cache=1400
binlog_row_event_max_size=8K
sync_master_info=10000
sync_relay_log=10000
sync_relay_log_info=10000
#批量插入数据缓存大小，可以有效提高插入效率，默认为8M
bulk_insert_buffer_size=64M
interactive_timeout=120
wait_timeout=120
log-bin-trust-function-creators=1
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
#
# include all files from the config directory
#
!includedir /etc/my.cnf.d
保存退出
12、启动mysql
#/etc/init.d/mysqld start
新版本的安装包会报错，错误内容如下：
Starting MySQL.Logging to '/data/mysql/SZY.err'.
2018-07-02T10:09:03.779928Z mysqld_safe The file /usr/local/mysql/bin/mysqld
does not exist or is not executable. Please cd to the mysql installation
directory and restart this script from there as follows:
See http://dev.mysql.com/doc/mysql/en/mysqld-safe.html for more information
ERROR! The server quit without updating PID file (/software/mysql/mysqld.pid).
因为新版本的mysql安全启动安装包只认/usr/local/mysql这个路径。
解决办法：
方法1、建立软连接
例 #cd /usr/local/mysql
#ln -s /sofware/mysql/bin/myslqd mysqld
方法2、修改mysqld_safe文件(有强迫症的同学建议这种，我用的这种)
# vim /software/mysql/bin/mysqld_safe
将所有的/usr/local/mysql改为/software/mysql
保存退出。(可以将这个文件拷出来再修改然后替换)
13、登录mysql
#/software/mysql/bin/mysql -u root –p
14、输入临时密码。临时密码就是第8条root@localhost:后面的内容
15、修改mysql的登录密码
>mysql set password=password('root');
>mysql grant all privileges on *.* to root@'%' identified by 'root';
>mysql flush privileges;
16、完成，此时mysql的登录名root 登录密码root
