rpm -qa | egrep   "mysql|mariadb"
yum remove  mysql*
yum remove  mariadb-libs-*

vim /etc/security/limits.conf
# 修改
* soft nofile 65535
* hard nofile 65535

useradd  -r -s /usr/sbin/nologin mysql

mkdir -p /home/mysql_data
chown -R mysql:mysql /home/mysql_data

yum install -y jemalloc perl-Data-Dumper  perl-Test-Harness perl-Test-Simple openssl098e

tar xf Percona-Server-5.6.31-rel77.0-Linux.x86_64.ssl101.tar.gz -C /opt/
ln -sv /opt/Percona-Server-5.6.31-rel77.0-Linux.x86_64.ssl101 /opt/mysql
chown -R mysql:mysql /opt/Percona-Server* /opt/mysql

cat >>  /etc/my.cnf << EOF
# --------------------------- Start -----------------------
#my.cnf
[client]
port            = 3306
socket          = /tmp/mysql.sock

[mysql]
prompt="\u@\h \D [\d] \n-->"
# pager="less -i -n -S"
# tee=/home/mysql_data/query.log
# no-auto-rehash # 不使用自动补全
auto-rehash  


[mysqld]
user = mysql
basedir = /opt/mysql
datadir = /home/mysql_data
port = 3306
socket = /tmp/mysql.sock
# bind_address = 0.0.0.0

# 线程池
thread_handling=pool-of-threads
thread_pool_size=50  
# timeout
interactive_timeout = 3000
wait_timeout = 3000

# character set
character-set-server = utf8

open_files_limit = 65535
max_connections = 1000
max_connect_errors = 100000

#logs
log-output=file
slow_query_log = 1
slow_query_log_file = /home/mysql_data/slow.log
log-error = /home/mysql_data/error.log
log_warnings = 2
pid-file = /home/mysql_data/mysql.pid
long_query_time = 1
#log-slow-admin-statements = 1
#log-queries-not-using-indexes = 1
log-slow-slave-statements = 1

# binlog
binlog_format = mixed
server-id = 1
log-bin = mybinlog
binlog_cache_size = 4M
max_binlog_size = 512M
innodb_log_files_in_group = 2
max_binlog_cache_size = 512M
sync_binlog = 1
expire_logs_days = 10
skip_name_resolve = 1
# for 5.6
explicit_defaults_for_timestamp = 1

# buffers & cache
table_open_cache = 2048
table_definition_cache = 2048
table_open_cache = 2048
max_heap_table_size = 96M
sort_buffer_size = 2M
join_buffer_size = 2M
thread_cache_size = 256
query_cache_size = 0
query_cache_type = 0
query_cache_limit = 256K
query_cache_min_res_unit = 512
thread_stack = 192K
tmp_table_size = 96M
key_buffer_size = 8M
read_buffer_size = 2M
read_rnd_buffer_size = 16M
bulk_insert_buffer_size = 32M

# myisam
myisam_sort_buffer_size = 128M
myisam_max_sort_file_size = 1G
myisam_repair_threads = 1

# innodb
# 注意修改 buffer pool大小 
innodb_buffer_pool_size = 1G
innodb_buffer_pool_instances = 1
innodb_data_file_path = ibdata1:1G:autoextend
innodb_flush_log_at_trx_commit = 1
innodb_log_buffer_size = 64M
innodb_log_file_size = 256M
innodb_max_dirty_pages_pct = 50
innodb_file_per_table = 1
innodb_rollback_on_timeout
innodb_status_file = 1
innodb_io_capacity = 2000
transaction_isolation = READ-COMMITTED
innodb_flush_method = O_DIRECT
# --------------------------- End -----------------------
EOF

/opt/mysql/scripts/mysql_install_db --user=mysql --basedir=/opt/mysql --datadir=/home/mysql_data --defaults-file=/etc/my.cnf

cp /opt/mysql/support-files/mysql.server /etc/init.d/mysqld

vim /etc/init.d/mysqld
# 修改 46 47 行
basedir=/opt/mysql
datadir=/home/mysql_data

chmod +x /etc/init.d/mysqld
chkconfig --add mysqld
chkconfig mysqld on

vim  /etc/profile.d/mysql.sh
export PATH=/opt/mysql/bin:$PATH

source /etc/profile.d/mysql.sh
# 导出头文件
cat >> /etc/ld.so.conf.d/mysql.conf <<EOF
/opt/mysql/lib
EOF

ldconfig

chown -R mysql:mysql /opt/mysql /home/mysql_data /opt/Percona-Server*
/etc/init.d/mysqld start # 启动数据库
/etc/init.d/mysqld stop  # 停止数据库