redis install ubuntu 20.04 with wordpress php redis mysql configuration

Redis installation on ubuntu 20.04

 

1st step: update & install redis server form ubuntu repository

sudo apt update && sudo apt install redis-server

 

2nd redis server configuration

edit

sudo nano /etc/redis/redis.conf

 

change:

: supervised no // change here

supervised systemd

then it runs as a service

bind local or remote address

bind 127.0.0.1 ::1

maxmemory 256mb
maxmemory-policy allkeys-lru

step 3 restart reload  redis

systemctl restart redis

systemctl status redis

check port redis running or not

sudo netstat -lnp | grep redis

to check ports

redis-cli

send ping then it returns pong.

php 7 install redis extension

How to use redis wordpress

installing and configuring Redis, >> installing a PHP extension, >>Redis Object Cache plugin.

#1 Installing php redis extension

#2 by Enable Redis object cache in w3 Total cache

Performance (w3tc)>> General settings>> page cache>>

1. Disc basic
2. Disc enhance
3. Php Apcu
4. Redis  (it will available once you load redis PHP extension)

 

#3 Edit wp-config.php file  (no need redis plugin installed)

define(‘WP_CACHE’, true);
define(‘WP_CACHE_KEY_SALT’, ‘yoursite.com’);

Note: object-cache.php (generated by any plugin) should be ar wp-content directory.

#2nd way  install redis object cache plugin

 

if root access then try this command. shared hosting servers may not offer this.

redis-cli monitor

Verify if Redis working with redis-cli monitor


redis-cli monitor

When you run this command, you will see the real-time output of Redis serving cached queries. If you don’t see anything, visit your website and reload a page.

Go to the terminal and access Redis CLI using redis-cli and the KEYS *

Retrieving All Existing Keys

It may ruin performance when it is executed against large databases.

> KEYS *
1) "title:1"
2) "title:2"
3) "title"
4) "author:2"
5) "author"
6) "author:1"

using redis and mysql together

Redis is an in-memory databases,  faster as compare to query the data from hdd MYSQL. also read mysql buffer pool cache

how to use redis with mysql database in Apache nginx

redis php extension from github (predis library from github), or wordpress directory

mysql smart plugin,

like memcached plugin for mysql

InnoDB memcached plugin ( daemon_memcached ) provides an integrated memcached daemon.

 

 

Reinstall Uninstall & install redis on Ubuntu 20.4

sudo apt-get remove

sudo apt-get purge redis-server

//pyrhe removes config files

 

apt install redis-server

check status

service redis-server status

root@-s-4vcpu-8gb-blr1-01:~# service redis-server status
● redis-server.service – Advanced key-value store
Loaded: loaded (/lib/systemd/system/redis-server.service; enabled; vendor preset: enabled)
Active: active (running) sin

 

ps aux | grep redis

edit redis configuration file

restart

service redis-server start

MySQL and Redis drivers

Installing Redis from source

2.working with redis configuration file

3.Create Redis systemd Unit File

save the file by CTRL+X and type and hit enter.

4.Creating User /group /directories and permissions

sudo adduser –system —group –no-create-home redis &&  mkdir /var/lib/redis && chown redis:redis /var/lib/redis && chmod 770 /var/lib/redis

start

sudo systemctl start redis

stop

sudo systemctl stop redis

restart

sudo systemctl restart redis

Enable Redis on every Bootup

 

APcu vs Memcached vs Redis

enable memcached plugin with mysql

how to use memcached with wordpress

#1 install memcached ubuntu / debian family

#1.1 configuring memcached  conf memory limit

memory allocation

Locate the -m parameter.
value to MB or GB based on DB size frequently accessed data.

256MB for low end servers 512MB 1Gb as per need.

 

#2 install php -memcached extension from github

#4 install w3tc