How to install redis extension in liunx php
Liunx PHP installation redis extension method: 1. Check the redis version; 2. Download the installation package through the wget command and decompress the installation package through "tar zxf"; 3. Execute "cd redis-4.0.8/src make" to install redis.
The operating environment of this tutorial: linux5.9.8 system, redis version 4.0.8, DELL G3 computer
linux installation redis
#linux Installing redis is very simple and is introduced on the official website.
Install redis:
1. First check the redis version and find the version you want to download: https://www. php.cn/link/136929a11b983e70981aaa17550ba1b2
2. Install redis
#2.1 下载安装包 wget http://download.redis.io/releases/redis-4.0.8.tar.gz #2.2 解压 tar zxf redis-4.0.8.tar.gz
1 is the downloaded installation Package, 2 is the unzipped folder. Remember this file directory, I decompressed it under /root, and I will use the files in this redis directory for subsequent startup
#2.3编译 cd redis-4.0.8/src make
#2.4 新建redis文件夹 mkdir /usr/local/redis
#2.5移动文件 cd redis-4.0.8/src mv redis-server /usr/local/redis mv redis-benchmark /usr/local/redis mv redis-cli /usr/local/redis cd ../ mv redis.conf /usr/local/redis
#2.6 启动redis cd /usr/local/redis ./redis-server #这个是以默认配置开启，配置文件redis.conf 开机自启要用到。
Possible warnings:
WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
vim /etc/sysctl.conf
net.core.somaxconn = 511
Save and exit
Then: sysctl -p
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.
Newline add: vm.overcommit_memory=1
Exit after saving
sysctl -pWARNING 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.
Solution:
Newline add: if test -f /sys/kernel/mm/transparent_hugepage/enabled; then
echo never > /sys/kernel/mm/transparent_hugepage/enabled
fi
Exit after saving
reboot
Generally, a new server will have these three warnings when it first installs redis and then starts it.
#2.7 连接redis，进行测试 ./redis-cli set pandent 2018 get pandent
The setting and retrieval are normal, indicating that redis has been installed successfully. 
Recommended study: "
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