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    You are at:Home»Caching Server»How To Install Memcached on Ubuntu 20.04

    How To Install Memcached on Ubuntu 20.04

    By RahulAugust 18, 20203 Mins Read

    Memcached is a distributed memory object caching system which stored data in memory on key-value basis. It is very useful for optimizing dynamic websites and enabled speed by caching objects in memory.

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    This article will help you to install Memcached with PHP Memcache PECL extension on Ubuntu 20.04 systems.

    Prerequisites

    You must have shell access to your Ubuntu 20.04 system with sudo privileged account.

    Login to your system and complete this tutorial.

    Step 1 – Installing Memcached on Ubuntu

    First of all, update Apt package cache on your system then install Memcached service on your system. Execute below commands from command prompt.

    sudo apt update 
    sudo apt install memcached 
    

    Step 2 – Configure Memcached

    You can find the details information about Memcache configuration here. For initial level configuration check for the following settings under Memcache configuration file /etc/memcached.conf.

    • -d => Run Memcached in deamon mode. You can use this option to configure your Memcached server to run as service.
    • -m => Define the maximum number of Memory can be used by Memcached deamon. (default: 64 MB)
    • -p => Defind port for Memcached to listen on. (default: 11211)
    • -l => Define the IP address to Memcached listen on. Set 0.0.0.0 to listen on all IPs(enterfaces) configured on system.

    After making changes, restart the Memcached service.

    sudo systemctl restart memcached 
    

    Step 3 – Verify Memcache Setup

    Use the following command to check and verify that Memcached service is running properly on your system. This will show you the current statstics of your Memcached server. So the values may be differ that below results.

    echo "stats settings" | nc localhost 11211 
    

    Output:

    STAT maxbytes 134217728
    STAT maxconns 1024
    STAT tcpport 11211
    STAT udpport 11211
    STAT inter 127.0.0.1
    STAT verbosity 0
    STAT oldest 0
    STAT evictions on
    STAT domain_socket NULL
    STAT umask 700
    STAT growth_factor 1.25
    STAT chunk_size 48
    STAT num_threads 4
    STAT num_threads_per_udp 4
    STAT stat_key_prefix :
    STAT detail_enabled no
    STAT reqs_per_event 20
    STAT cas_enabled yes
    STAT tcp_backlog 1024
    STAT binding_protocol auto-negotiate
    STAT auth_enabled_sasl no
    STAT item_size_max 1048576
    STAT maxconns_fast no
    STAT hashpower_init 0
    STAT slab_reassign no
    STAT slab_automove 0
    STAT lru_crawler no
    STAT lru_crawler_sleep 100
    STAT lru_crawler_tocrawl 0
    STAT tail_repair_time 0
    STAT flush_enabled yes
    STAT hash_algorithm jenkins
    STAT lru_maintainer_thread no
    STAT hot_lru_pct 32
    STAT warm_lru_pct 32
    STAT expirezero_does_not_evict no
    END
    

    Step 4 – Installing Memcache/Memcached PHP Module

    Now install latest PHP from ppa:ondrej/php PPA on your Ubuntu system. If you have already installed PHP on your system, just skip PHP installation commands below.

    sudo add-apt-repository ppa:ondrej/php 
    sudo apt update 
    sudo apt install -y php php-dev php-pear libapache2-mod-php 
    

    Now install PHP Memcached module on your system. The below command will also do the required configuration.

    sudo apt install -y php-memcached php-memcache 
    

    After completing the installation, you must restart the Apache service.

    sudo systemctl restart apache2 
    

    Check if Memcache php extension is enabled and working properly. Create a info.php file under the document root of your domain with following code:

    /var/www/html/info.php

    1
    2
    3
    <?php
      phpinfo();
    ?>

    Now access info.php on the web interface and search for Memcache, You will get the result like below.

    https://server-ip/info.php

    How to Install Memcached on Ubuntu 20.04

    Conclusion

    In this tutorial, you have learned to install Memcached service along with PHP extension on your Ubuntu 20.04 system.

    memcache memcached
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