使用Google的Tcmalloc加速MySQL
1. 下载mysql的源码包，进行编译安装（略）2. 下载安装google-perftools
wget https://lnamp-web-server.googlecode.com/files/google-perftools-1.7.tar.gz
wget http://ftp.twaren.net/Unix/NonGNU//libunwind/libunwind-0.99.tar.gz
3. 64位的系统需要安装libunwind软件包
tar zxvf libunwind-0.99.tar.gz
cd libunwind-0.99
CFLAGS=-fPIC ./configure --enable-shared
make CFLAGS=-fPIC
make CFLAGS=-fPIC install
4. 安装google-perftools软件包
tar zxvf google-perftools-1.7.tar.gz
cd google-perftools-1.7
mkdir /work/tc
./configure --prefix=/work/tc --disable-cpu-profiler --disable-heap-profiler--disable-heap-checker --disable-debugalloc --enable-minimal
make && make install
5. 复制动态链接库到系统目录
cp /work/tc/lib/libtcmalloc_minimal.so.0.1.0 /usr/local/lib
ln -s /usr/local/lib/libtcmalloc_minimal.so.0.1.0/usr/local/lib/libtcmalloc.so
ln -s /usr/local/lib/libtcmalloc_minimal.so.0.1.0/usr/local/lib/libtcmalloc.so.0
ln -s /usr/local/lib/libtcmalloc_minimal.so.0.1.0/usr/local/lib/libtcmalloc.so.0.1.0
6. 调整mysqld_safe配置文件
vim /work/mysql5.5/bin/mysqld_safe 在此行文件的后面添加：
# executing mysqld_safe
exportLD_PRELOAD="/usr/local/lib/libtcmalloc.so"
7. 重启mysql
/etc/init.d/mysql restart 8. 验证
# lsof-n | greptcmalloc
mysqld 17895 mysqlmem REG 253,0 962769 534587 /usr/local/lib/libtcmalloc_minimal.so.0.1.0
#
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