达梦使用jemalloc内存分配器

下载和安装jemalloc内存分配器

wget https://github.com/jemalloc/jemalloc/archive/5.2.1.tar.gz

tar -xzvf 5.2.1.tar.gz

cd jemalloc-5.2.1/

yum -y install autogen autoconf

yum install -y gcc gcc-c++

./autogen.sh

./configure --prefix=/usr/lib

make -j 8

make install

通过上述命令安装完成之后。找到libjemalloc.so文件路径

 

在达梦启动脚本加入jemalloc库文件

export LD_PRELOAD="/usr/lib/lib/libjemalloc.so"

重启数据库生效 通过进程号查看内存库是否更换完毕，这里通过root用户重启没生效，切换dmdba用户重启之后才生效

pmap -x -p $(pgrep -f dmserver) | grep jemalloc

附：还可以通过RPM包安装jemalloc 

文件：jemalloc-5.2.1-2.el8.rpm  链接: https://pan.baidu.com/s/1fx6gpsXZvvdRicxtLx6ZzA 提取码: s6tg

rpm -i jemalloc-5.2.1-2.el8.x86_64.rpm

[root@localhost /dm8]$ rpm -qa | grep jemalloc

jemalloc-5.2.1-2.el8.x86_64

[root@localhost /dm8]$ rpm -ql jemalloc-5.2.1-2.el8.x86_64

/usr/bin/jemalloc.sh

/usr/lib/.build-id

/usr/lib/.build-id/16

/usr/lib/.build-id/16/0e34e6e44392d63f4532d5c21f3285f4f011d9

/usr/lib64/libjemalloc.so.2

/usr/share/doc/jemalloc

/usr/share/doc/jemalloc/COPYING

/usr/share/doc/jemalloc/README

/usr/share/doc/jemalloc/VERSION

/usr/share/doc/jemalloc/jemalloc.html