yum  -y install bzip2 wget
yum  -y install gcc gcc-c++
wget https://mirrors.linyaohong.com/src/jemalloc/jemalloc-5.1.0.tar.bz2
tar xjf jemalloc-5.1.0.tar.bz2
cd  jemalloc-5.1.0
./configure
make && make install
ln -s /usr/local/lib/libjemalloc.so.2 /usr/lib64/libjemalloc.so.1
[ -z "`grep /usr/local/lib /etc/ld.so.conf.d/*.conf`" -a -z "`grep /usr/local/lib /etc/ld.so.conf`" ] && echo '/usr/local/lib' > /etc/ld.so.conf.d/local.conf
ldconfig

wget https://mirrors.linyaohong.com/src/mysql/mysql-5.7.27-linux-glibc2.12-x86_64.tar.gz
tar zxf mysql-5.7.27-linux-glibc2.12-x86_64.tar.gz
id -u mysql >/dev/null 2>&1
[ $? -ne 0 ] && useradd -M -s /sbin/nologin mysql
[ ! -d /data/mysql ] && mkdir -p /data/mysql