scvmm 发表于 2018-10-3 11:34:18

MySQL 优化(memcache)

  MySQL调优(mamcache)

[*]  架构
  Web+memcache
  Memcached
  Mysql

[*]  搭建lamp架构
  yum install http* php* mysql* -y
  添加网站
  /etc/init.d/httpd start
  修改网页配置
  vim read.php
  $memcachehost = '192.168.5.16';
  $conn=mysql_connect("192.168.5.15","root","123456");
  vim write.php
  $memcachehost = '192.168.5.16';
  $conn=mysql_connect("192.168.5.15","root","123456");
  安装memcache客户端
  tar xf memcache-2.2.7.tgz -C /usr/src/
  cd memcache-2.2.7/
  ls(没有configure的解决方法)
  phpize(-bash:phpize: command not found 的解决方法:yum install php-devel)
  ./configure --enable-memcache--with-php-config=/usr/bin/php-config
  make && make install
  vim /etc/php.ini(查找PHP调用模块的存放目录)
  extension_dir = "/usr/lib/php/modules
  ls /usr/lib/php/modules(查看PHP可以调用哪些模块)
  dbase.so memcache.sophpcups.so
  vim /etc/php.ini
  extension_dir ="/usr/lib/php/modules"(该行下加入)
  extension=memcache.so(让PHP调用memcache模块)

  /etc/init.d/httpd>  php –m(查看PHP调用哪些模块,等价于访问这个页面)
  必须有memcache 和mysql模块

[*]  安装MySQL
  yum install mysql* -y
  /etc/init.d/mysqld start
  建数据库
  # mysql
  mysql> create database db1;
  mysql> use db1;
  mysql> create table T1(IDint)engine=innodb;

  mysql> grant all on *.* to'root'@'192.168.5.14'>  mysql> flush privileges;
  mysql> exit
  生成数据
  seq 1 19999999 >/tmp/big
  # mysql
  mysql> use db1;
  mysql> load data infile '/tmp/big'into table T1;
  mysql> exit
  远程测试
  mysql -h 192.168.5.15 -u root -p123456

[*]  安memcached服务端
  tar xf libevent-2.0.22-stable.tar.gz -C/usr/src/
  cd libevent-2.0.22-stable/
  ./configure--prefix=/usr/local/libevent && make&& make install
  tar xf memcached-1.4.22.tar.gz -C/usr/src/
  ./configure--prefix=/usr/local/memcached --with-libevent=/usr/local/libevent/
  开启memcached
  /usr/local/memcached//bin/memcached -uroot -p 11211 -l 192.168.5.16 -P /var/run/memcached.pid -m 128m -c 2048 –d
  -u 运行memcache服务的用户
  -P 端口号
  -l 监听地址
  -p(大) 指定pid放到哪个文件中
  -m 从内存上划分多少容量来缓存数据
  -c并发是多少
  -d 以后台执行

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