LNMP 安装内存优化Jemalloc TCmalloc 到底要不要安装

Posted 2023-05-10

参考技术A 应该是手机的剩余空间不多了造成的，可以先进行下空间清理
可以使用腾讯手机管家这类清理软件来进行清理
通过对手机上的垃圾和缓存进行全面的扫描之后进行一键清理
之后卸载一些不常用的软件并清理下卸载残留来释放手机空间本回答被提问者采纳

mysql-5.7.21 二进制安装 | Jemalloc内存优化 | 备份恢复｜修改密码

简介

######数据库目录/usr/local/mysql############
######数据目录/data/mysql############
######慢日志目录/data/slowlog############
######端口号默认3306其余参数按需自行修改############

安装脚本

#!/bin/bash
cd /usr/local/src/
if [ ! -f  mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz  ]; then
wget https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz
yum install -y autoconf automake imake libxml2-devel expat-devel cmake gcc gcc-c++ libaio libaio-devel bzr bison libtool ncurses-devel
fi

# 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

cd     /usr/local/src

if [ ! -f  jemalloc-5.0.1.tar.bz2  ]; then

yum install  bzip2 -y
wget       https://github.com/jemalloc/jemalloc/releases/download/5.0.1/jemalloc-5.0.1.tar.bz2
tar     -xjvf     jemalloc-5.0.1.tar.bz2

cd jemalloc-5.0.1/
./configure  -prefix=/usr/local/jemalloc    --libdir=/usr/local/lib
make  && make install

echo  /usr/local/lib >> /etc/ld.so.conf
ldconfig
fi

cp /usr/local/lib/libjemalloc.so            /usr/lib

echo "========================================================================="
echo "A tool to auto-compile & install MySQL 5.7.21 on Redhat/CentOS Linux "
echo "========================================================================="
cur_dir=$(pwd)
#set mysql root password
    echo "==========================="
    mysqlrootpwd="123456"
    echo -e "Please input the root password of mysql:"
    read -p "(Default password: 123456):" mysqlrootpwd
    if [ "$mysqlrootpwd" = "" ]; then
        mysqlrootpwd="123456"
    fi
    echo "==========================="
    echo "MySQL root password:$mysqlrootpwd"
    echo "==========================="
#which MySQL Version do you want to install?
echo "==========================="
    isinstallmysql57="n"
    echo "Install MySQL 5.7.21,Please input y"
    read -p "(Please input y , n):" isinstallmysql57
    case "$isinstallmysql57" in
    y|Y|Yes|YES|yes|yES|yEs|YeS|yeS)
    echo "You will install MySQL 5.7.21"
    isinstallmysql57="y"
    ;;
    *)
    echo "INPUT error,You will exit install MySQL 5.7.21"
    isinstallmysql57="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
    #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
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_max_tw_buckets = 4096
net.ipv4.tcp_max_syn_backlog = 4096
" >> /etc/sysctl.conf

sysctl -p
}
#Install MySQL
function InstallMySQL57()
{
echo "============================Install MySQL 5.7.21=================================="
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

echo "============================MySQL 5.7.21 installing…………========================="

#mysql directory configuration
cd /usr/local/src
tar  xvf   mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz
mv mysql-5.7.21-linux-glibc2.12-x86_64   /usr/local/mysql
groupadd mysql -g 512
useradd -u 512 -g mysql -s /sbin/nologin -d /home/mysql mysql
mkdir -p /data/mysql
mkdir -p /data/slowlog
chown -R mysql:mysql /data/mysql
chown -R mysql:mysql /usr/local/mysql
chown -R mysql:mysql /data/slowlog

#edit /etc/my.cnf
SERVERID=`ifconfig eth0 | grep "inet" | 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]
no-auto-rehash
default-character-set=utf8
[mysqld]
port=3306
bind-address = 0.0.0.0
character-set-server=utf8
socket=/tmp/mysql.sock
pid-file=/data/mysql/mysqld.pid
basedir=/usr/local/mysql
datadir=/data/mysql
explicit_defaults_for_timestamp=true
lower_case_table_names=1
back_log=103
max_connections=3000
max_connect_errors=100000
table_open_cache=512
external-locking=FALSE
max_allowed_packet=32M
sort_buffer_size=16M
join_buffer_size=2M
thread_cache_size=51
query_cache_size=32M
#query_cache_limit=4M
transaction_isolation=REPEATABLE-READ
tmp_table_size=96M
max_heap_table_size=96M
###***slowqueryparameters
long_query_time=1
slow_query_log = 1
slow_query_log_file=/data/slowlog/slow.log
###***binlogparameters
log-bin=mysql-bin
binlog_cache_size=4M
max_binlog_cache_size=4096M
max_binlog_size=1024M
binlog_format=MIXED
expire_logs_days=7
###***relay-logparameters
#relay-log=/data/3307/relay-bin
#relay-log-info-file=/data/3307/relay-log.info
#master-info-repository=table
#relay-log-info-repository=table
#relay-log-recovery=1
#***MyISAMparameters
key_buffer_size=16M
read_buffer_size=1M
read_rnd_buffer_size=16M
bulk_insert_buffer_size=1M
#skip-name-resolve
###***master-slavereplicationparameters
server-id=$SERVERID
#slave-skip-errors=all

#***Innodbstorageengineparameters
innodb_buffer_pool_size=2G            #  操作系统内存的70%-80%最佳。
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=2
innodb_max_dirty_pages_pct=75
innodb_buffer_pool_dump_pct=50
innodb_lock_wait_timeout=50
innodb_file_per_table=OFF

[mysqldump]
quick
max_allowed_packet=32M

[myisamchk]
key_buffer=16M
sort_buffer_size=16M
read_buffer=8M
write_buffer=8M
[mysqld_safe]
malloc-lib=/usr/lib/libjemalloc.so
open-files-limit=8192
log-error=/data/mysql/error.log
pid-file=/data/mysql/mysqld.pid
EOF

/usr/local/mysql/bin/mysqld     --defaults-file=/etc/my.cnf     --user=mysql --datadir=/data/mysql   --basedir=/usr/local/mysql  --initialize-insecure

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

/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$mysqlrootpwd -h localhost < /tmp/mysql_sec_script
rm -f /tmp/mysql_sec_script
#/etc/init.d/mysqld restart
echo "============================MySQL 5.7.21 install completed========================="
}
function CheckInstall()
{
echo "===================================== Check install ==================================="
clear
ismysql=""
echo "Checking..."
if [ -s /usr/local/mysql/bin/mysql ] && [ -s /usr/local/mysql/bin/mysqld_safe ] && [ -s /etc/my.cnf ]; then
  echo "MySQL: OK"
  ismysql="ok"
  else
  echo "Error: /usr/local/mysql not found!!!MySQL install failed."
fi
if [ "$ismysql" = "ok" ]; then

echo "Install MySQL 5.7.21 completed! enjoy it."
echo "========================================================================="

netstat -lntup
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
InstallDependsAndOpt 2>&1 | tee -a /root/mysql-install.log
InstallMySQL57 > /dev/null
CheckInstall 2>&1 | tee -a /root/mysql-install.log

备份

mysqldump  -uroot -p123456 -B  ultrax        --single-transaction  --master-data=2  > ultrax.sql

-A  全备份
-B  备份库（表结构和数据）
--single-transaction    预防锁   数据一致性   确保本次会话(dump)时，不会看到其他会话已经提交了的数据。
--master-data=2     注释记录复制信息
                       =1      记录change  master to 语句

查看ＳＱＬ

egrep -v "#|\*|--|^$"    ultrax.sql

恢复

mysql  -uroot -p123456        < /root/ultrax.sql

修改密码

[mysqld]
skip-grant-tables

./mysqladmin -uroot -p password

update user set password=password(‘root‘) where user=‘root‘;

update user set authentication_string=PASSWORD(‘123456‘)  where user=‘root‘;