Mysql5.6新特性: 1.優化器的改進:主要體現在索引條件pushdown以及多範圍的讀取數據，可降低過載。
2,InnoDB的改進:MySQL InnoDB 存儲引擎團隊主要提供了 NoSQL 的訪問接口，可通過 Memcached 的 API 直接訪問 InnoDB 的表。
3，更好的複製:改進數據完整性和高可用性及性能方面大大提升。
安裝環境， 一臺Centos6.5 推薦二進制安裝。 本文已經經過測試，作爲生產庫來說沒有問題。每個公司需求不同可以稍稍改動，本文使用的是mysql-5.6.25-linux-glibc2.5-x86_64.tar.gz
如版本不同可以更改腳本的109 和110行替換mysql安裝包名稱。
2.開始安裝，安裝時把安裝包放在root和腳本放在root下即可。
腳本如下:
[root@centos4 ~]# cat install-mysql.sh
###### 二進制自動安裝數據庫腳本root密碼MANAGER將腳本和安裝包放在/root目錄即可###############
######數據庫目錄/usr/local/mysql############
######數據目錄/data/mysql############
######日誌目錄/log/mysql############
######端口號默認3306其餘參數按需自行修改############
##################
#author：zhangbin
##################
#!/bin/bash
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/opt/bin:/opt/sbin:~/bin
export PATH
# Check if user is root
if [ $(id -u) != "0" ]; then
echo "Error: You must be root to run this script, please use root to install"
exit 1
fi
clear
echo "========================================================================="
echo "A tool to auto-compile & install MySQL 5.6.25 on Redhat/CentOS Linux "
echo "========================================================================="
cur_dir=$(pwd)
#set mysql root password
echo "==========================="
mysqlrootpwd="MANAGER"
echo -e "Please input the root password of mysql:"
read -p "(Default password: MANAGER):" mysqlrootpwd
if [ "$mysqlrootpwd" = "" ]; then
mysqlrootpwd="MANAGER"
fi
echo "==========================="
echo "MySQL root password:$mysqlrootpwd"
echo "==========================="
#which MySQL Version do you want to install?
echo "==========================="
isinstallmysql56="n"
echo "Install MySQL 5.6.25,Please input y"
read -p "(Please input y , n):" isinstallmysql56
case "$isinstallmysql56" in
y|Y|Yes|YES|yes|yES|yEs|YeS|yeS)
echo "You will install MySQL 5.6.25"
isinstallmysql56="y"
;;
*)
echo "INPUT error,You will exit install MySQL 5.6.25"
isinstallmysql56="n"
exit
esac
get_char()
{
SAVEDSTTY=`stty -g`
stty -echo
stty cbreak
#dd if=/dev/tty bs=1 count=1 2> /dev/null
stty -raw
stty echo
stty $SAVEDSTTY
}
echo ""
echo "Press any key to start...or Press Ctrl+c to cancel"
char=`get_char`
# Initialize the installation related content.
function InitInstall()
{
cat /etc/issue
uname -a
MemTotal=`free -m | grep Mem | awk '{print $2}'`
echo -e "\n Memory is: ${MemTotal} MB "
#Set timezone
#rm -rf /etc/localtime
#ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
#Delete Old Mysql program
rpm -qa|grep mysql
rpm -e mysql
#yum -y remove mysql-server mysql mysql-libs
#yum -y remove php-mysql
#yum -y install yum-fastestmirror
#yum -y update
#Disable SeLinux
if [ -s /etc/selinux/config ]; then
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
fi
setenforce 0
}
#Installation of depend on and optimization options.
function InstallDependsAndOpt()
{
cd $cur_dir
cat >>/etc/security/limits.conf<<EOF
* soft nproc 65535
* hard nproc 65535
* soft nofile 65535
* hard nofile 65535
EOF
echo "fs.file-max=65535" >> /etc/sysctl.conf
}
#Install MySQL
function InstallMySQL56()
{
echo "============================Install MySQL 5.6.22=================================="
cd $cur_dir
#Backup old my.cnf
#rm -f /etc/my.cnf
if [ -s /etc/my.cnf ]; then
mv /etc/my.cnf /etc/my.cnf.`date +%Y%m%d%H%M%S`.bak
fi
#mysql directory configuration
groupadd mysql -g 512
useradd -u 512 -g mysql -s /sbin/nologin -d /home/mysql mysql
tar xvf /root/mysql-5.6.25-linux-glibc2.5-x86_64.tar.gz
mv /root/mysql-5.6.25-linux-glibc2.5-x86_64 /usr/local/mysql
mkdir -p /data/mysql
mkdir -p /log/mysql
chown -R mysql:mysql /data/mysql
chown -R mysql:mysql /usr/local/mysql
chown -R mysql:mysql /log
#edit /etc/my.cnf
SERVERID=`ifconfig eth0 | grep "inet addr" | awk '{ print $2}'| awk -F. '{ print $3$4}'`
cat >>/etc/my.cnf<<EOF
[client]
port= 3306
socket= /tmp/mysql.sock
default-character-set=utf8
[mysql]
default-character-set=utf8
[mysqld]
port= 3306
socket= /tmp/mysql.sock
basedir= /usr/local/mysql
datadir= /data/mysql
open_files_limit = 3072
back_log = 103
max_connections = 800
max_connect_errors = 100000
table_open_cache = 512
external-locking = FALSE
max_allowed_packet = 32M
sort_buffer_size = 2M
join_buffer_size = 2M
thread_cache_size = 51
query_cache_size = 32M
tmp_table_size = 96M
max_heap_table_size = 96M
slow_query_log = 1
slow_query_log_file = /log/mysql/slow.log
log-error = /log/mysql/error.log
long_query_time = 1
server-id = $SERVERID
log-bin = mysql-bin
sync_binlog = 1
binlog_cache_size = 4M
max_binlog_cache_size = 4096M
max_binlog_size = 1024M
expire_logs_days = 60
key_buffer_size = 32M
read_buffer_size = 1M
read_rnd_buffer_size = 16M
bulk_insert_buffer_size = 64M
character-set-server=utf8
default-storage-engine = InnoDB
binlog_format = row
innodb_buffer_pool_dump_at_shutdown = 1
innodb_buffer_pool_load_at_startup = 1
binlog_rows_query_log_events = 1
explicit_defaults_for_timestamp = 1
#log_slave_updates=1
#gtid_mode=on
#enforce_gtid_consistency=1
#innodb_write_io_threads = 8
#innodb_read_io_threads = 8
#innodb_thread_concurrency = 0
transaction_isolation = REPEATABLE-READ
innodb_additional_mem_pool_size = 16M
innodb_buffer_pool_size = 512M
#innodb_data_home_dir =
innodb_data_file_path = ibdata1:1024M:autoextend
innodb_flush_log_at_trx_commit = 1
innodb_log_buffer_size = 16M
innodb_log_file_size = 512M
innodb_log_files_in_group = 2
innodb_max_dirty_pages_pct = 50
innodb_file_per_table = 1
innodb_locks_unsafe_for_binlog = 0
wait_timeout = 14400
interactive_timeout = 14400
skip-name-resolve
[mysqldump]
quick
max_allowed_packet = 32M
EOF
/usr/local/mysql/scripts/mysql_install_db --basedir=/usr/local/mysql --datadir=/data/mysql --defaults-file=/etc/my.cnf --user=mysql
cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
chmod 700 /etc/init.d/mysqld
chkconfig --add mysqld
chkconfig --level 2345 mysqld on
cat >> /etc/ld.so.conf.d/mysql-x86_64.conf<<EOF
/usr/local/mysql/lib
EOF
ldconfig
if [ -d "/proc/vz" ];then
ulimit -s unlimited
fi
/etc/init.d/mysqld start
cat >> /etc/profile <<EOF
export PATH=$PATH:/usr/local/mysql/bin
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/mysql/lib
EOF
source /etc/profile
/usr/local/mysql/bin/mysqladmin -u root password $mysqlrootpwd
cat > /tmp/mysql_sec_script<<EOF
use mysql;
delete from mysql.user where user!='root' or host!='localhost';
grant all privileges on *.* to 'sys_admin'@'%' identified by 'MANAGER';
flush privileges;
EOF
/usr/local/mysql/bin/mysql -u root -p$mysqlrootpwd -h localhost < /tmp/mysql_sec_script
#rm -f /tmp/mysql_sec_script
/etc/init.d/mysqld restart
echo "============================MySQL 5.6.25 install completed========================="
}
function CheckInstall()
{
echo "===================================== Check install ==================================="
clear
ismysql=""
echo "Checking..."
if [ -s /usr/local/mysql/bin/mysql ] && [ -s /usr/local/mysql/bin/mysqld_safe ] && [ -s /etc/my.cnf ]; then
echo "MySQL: OK"
ismysql="ok"
else
echo "Error: /usr/local/mysql not found!!!MySQL install failed."
fi
if [ "$ismysql" = "ok" ]; then
echo "Install MySQL 5.6.25 completed! enjoy it."
echo "========================================================================="
netstat -ntl
else
echo "Sorry,Failed to install MySQL!"
echo "You can tail /root/mysql-install.log from your server."
fi
}
#The installation log
InitInstall 2>&1 | tee /root/mysql-install.log
CheckAndDownloadFiles 2>&1 | tee -a /root/mysql-install.log
InstallDependsAndOpt 2>&1 | tee -a /root/mysql-install.log
InstallMySQL56 2>&1 | tee -a /root/mysql-install.log
CheckInstall 2>&1 | tee -a /root/mysql-install.log
3.執行完畢輸入:
[root@centos4 ~]# source /etc/profile
啓動：
[root@centos4 ~]# /etc/init.d/mysqld start
4.解決無法遠程連接數據庫的出現1045 access denied for user 'root'@localhhost' using password yes
5.在mysql中執行
在mysql命令行中執行
SET PASSWORD FOR'root'@'localhost' = PASSWORD('123456');
GRANT ALL PRIVILEGES ON *.* TO 'root' @'%' IDENTIFIED BY '123456' WITH GRANT OPTION;
flush privileges;
若以上方法不好使則:
use mysql;
UPDATE user SETPassword=PASSWORD('123456') where USER='root';
flush privileges;