4、阿里云服务器安装Redis

1、安装gcc

yum install cpp  
yum install binutils
yum install glibc-kernheaders
yum install glibc-common
yum install glibc-devel
yum install gcc
yum install make 

2、安装Redis

Redis官网地址

$ wget http://download.redis.io/releases/redis-5.0.0.tar.gz
$ tar xzf redis-5.0.0.tar.gz
$ cd redis-5.0.0
$ make

# 启动redis
src/redis-server

# 查询Redis进程
ps -ef | grep redis
# 结束Redis进程
kill -9 pid

注意启动报错：

• 警告：

WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.

# 解决
echo 511 >/proc/sys/net/core/somaxconn
echo "net.core.somaxconn = 551" > /etc/sysctl.conf

 Warning: no config file specified, using the default config. In order to specify a config file use src/redis-server /path/to/redis.conf

echo vm.overcommit_memory=1 >> /etc/sysctl.conf

• 警告：

 WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.

#解决
echo 1 > /proc/sys/vm/overcommit_memory
echo "vm.overcommit_memory=1" >> /etc/sysctl.conf

• 警告：

 WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.

# 解决
echo never > /sys/kernel/mm/transparent_hugepage/enabled

if test -f /sys/kernel/mm/transparent_hugepage/enabled; then
   echo never > /sys/kernel/mm/transparent_hugepage/enabled
fi
if test -f /sys/kernel/mm/transparent_hugepage/defrag; then
   echo never > /sys/kernel/mm/transparent_hugepage/defrag
fi