Install Memcached on Fedora 29/28, CentOS/RHEL 7.5/6.10 - Comment Page: 1

Updated on November 4, 2018 by JR 45 comments

Memcached is a high-performance, distributed memory object caching system, generic in nature, but originally intended for use in speeding up dynamic web applications by alleviating database load. Memcached is a very useful also in other cases, than only dynamic web applications. [inttf_post_ad1] This guide explains howto install Memcached 1.5.10/1.4.17/1.4.36 stable version of distributed memory object caching system on Fedora 29/28/27/26 and CentOS / Red Hat (RHEL) 7.5/6.10. Fedora 29/28/27/26, CentOS 7/6 and Red Hat (RHEL) 7/6 has Memcached on default repos, so extra repositories is not needed. 1. Install Memcached 1.5.10/1.4.17/1.4.36 on Fedora 29/28/27/26, CentOS/Red Hat...

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45 comments on “Install Memcached on Fedora 29/28, CentOS/RHEL 7.5/6.10 - Comment Page: 1”

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CharlesHSauer
1st June 2010, 3:38 am

The above instructions work fine for me with Fedora 12. Fedora 13 wasn’t working. /usr/lib/php/modules/memcache.so was missing. Copying that file from Fedora 12 installation seems to work, but I wonder why it was missing. rpm -ql memcached doesn’t show memcache.so.
Reply
JR
1st June 2010, 8:51 am
Hi Charles,

I verified again that the this guide is working also with Fedora 13.

If you want install Memcache PHP module then you need to install following package:
```
yum install php-pecl-memcache
```
Then you get /usr/lib/php/modules/memcache.so file right place.

I added this also on end of this guide. :)
Reply
jvc
26th September 2010, 7:17 am

Nice site…and nice work ..
Keep up…..
Reply
JOGLOHosting
8th January 2011, 5:26 pm

Hi,
thank for this nice tutorial for installing memcached, i’d to know what the best memory size for memcached on vps with 512MB of ram?
Reply
- JR
  10th January 2011, 9:32 am
  
  Of course, it depends on the intended use and the fact that whatever else the server is running, but maybe about 64-192 MB is good for memcached.
  Reply
jeff
22nd February 2011, 6:53 pm

no response from: rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-5.rpm

site appears to be dead
Reply
- JR
  24th February 2011, 10:13 am
  
  Hi jeff,
  
  For me it’s working normally…maybe it was down when you try to install it. So please try again.
  Reply
arod
5th March 2011, 7:22 am

Thanks!
Reply
onel0ve
11th March 2011, 7:01 pm

cant installl
—> Package perl-common-sense.i386 0:3.0-1.el5.rf set to be updated
–> Finished Dependency Resolution
perl-AnyEvent-5.240-1.el5.rf.noarch from rpmforge has depsolving problems
–> Missing Dependency: perl(Net::SSLeay) >= 1.33 is needed by package perl-AnyEvent-5.240-1.el5.rf.noarch (rpmforge)
Error: Missing Dependency: perl(Net::SSLeay) >= 1.33 is needed by package perl-AnyEvent-5.240-1.el5.rf.noarch (rpmforge)
You could try using –skip-broken to work around the problem
You could try running: package-cleanup –problems
package-cleanup –dupes
rpm -Va –nofiles –nodigest
Reply
- JR
  18th March 2011, 9:55 am
  Hi onel0ve,
  
  It seems that the problem is caused by rpmforge repo packages.
  
  Could you first post output of following command:
```
yum repolist
```
  Reply
HaYsSeN
4th April 2011, 2:03 pm

Hi Jeff,
Thanks a lot, the installation is done, class Memcache work fine but the class Memcached is not working, i get the message : Fatal error: Class ‘Memcached’ not found !
have you any idea about that
Reply
- JR
  5th April 2011, 8:36 am
  Hi HaYsSeN,
  
  If you want to install class Memcached then you need to install php-pecl-memcached package too:
```
yum install php-pecl-memcached
```
  I added this to guide too.
  Reply
Phoenix
14th January 2012, 8:07 am

Hi. Loved this very clear instruction.

I already have Memcached 1.2.0 installed:

> memcached -h memcached 1.2.0 -p port number to listen on -s unix socket path to listen on (disables network support) ....

I have the usual CentOS Base, EPEL, and even the REMI repositories installed now.

> yum repolist Loaded plugins: fastestmirror, priorities Loading mirror speeds from cached hostfile * epel: fedora-epel.mirror.lstn.net * remi: rpms.famillecollet.com repo id repo name status addons CentOS-5 - Addons enabled : 0 base CentOS-5 - Base enabled : 3,566 centosplus CentOS-5 - Plus enabled : 57 contrib CentOS-5 - Contrib enabled : 0 epel Extra Packages for Enterprise Linux 5 - enabled : 6,851 extras CentOS-5 - Extras enabled : 266 remi Les RPM de remi pour Enterprise Linux 5 enabled : 641 updates CentOS-5 - Updates enabled : 569 repolist: 11,950

But when I do a:

yum --enablerepo=remi update memcached

It somehow updates it to “1.4.5”. So I restart memcached with “service memcached restart”.

> service memcached restart Stopping memcached: [FAILED] Starting memcached: [ OK ]

Then when I do “memcached -h” again, I still see 1.2.0.

What am I missing?

Thanks.
Reply
- JR
  14th January 2012, 11:21 am
  Hi Phoenix,
  
  Nice to see you here!
  
  Could you post output of following command:
```
rpm -qa memcached
```
  Thanks.
  Reply
Santi Saez
7th February 2012, 4:11 pm

Actually EPEL for RHEL installs and outdated version of memcached (1.4.5, released 2 years ago), I suggest using at least memcached 1.4.10. Starting this release there is a big performance and scalability improvements, see developer notes.

Using PowerStack repository you can easily run latest memcached stable version in your CentOS boxes (4, 5 and 6 releases supported, i686 + x86_64), last LAMP stack stable versions and other key packages like: nginx, HAproxy, node.js, redis, Varnish, etc.

All code + .spec files are available on GitHub, check out the wiki page for installation instructions:

http://powerstack.org
Reply
- JR
  8th February 2012, 12:47 pm
  
  Hi Santi Saez,
  
  Thanks for sharing.
  
  I have to admit that I am not yet convinced quality of this repository. Then I believe this, when the repo has been in existence for a year or two and have still actively updated packages… ;)
  Reply
Hogie
9th February 2012, 11:09 pm

Hey JR! Thought you could get rid of me once my nginx was setup I bet, didn’t you :) Just kidding.

If I want to have nginx and memcached on a different server, do I need to install memcached on both servers for them to talk properly? I am currently setting my virtual host on nginx to send items to memcached on a proxy server, and if it fails to launch php on the live server. – http://pastebin.com/zZ3VAePi

I am receiving a 404 like this, but if i switch it back to just php it works fine. Is that virtual host correct? Am I receiving the 404 because the memcached server is not working properly?
Reply
- JR
  10th February 2012, 3:24 pm
  Hi again Hogie! :)
  
  First, you don’t need memcached on both servers.
  
  Your virtual host should look like following (if you want cache PHP requests):
```
    location ~ \.php$ {
            set $memcached_key $uri;
            memcached_pass     xxx.xxx.xxx.xxx:11211;
            default_type       text/html;
            error_page         404 = @cache_miss;
    }

    location @cache_miss {
        include /etc/nginx/fastcgi_params;
        fastcgi_pass  127.0.0.1:9000;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME /var/www/site1.xxx.ca/public_html$fastcgi_script_name;
    }
```
  Do you open 11211 port on another server firewall?
  
  You can test connection to another server with following command:
```
echo stats | nc xxx.xxx.xxx.xxx 11211
```
  Reply
  - Hogie
    10th February 2012, 4:23 pm
    
    That was what I had above, but I noticed I had commented out the “error_page 404 = @cache_miss:” for some reason. Guess I just needed a little push in the right direction :)
    
    Thanks again JR! You are amazing with helping and always so quick.
    Reply
flo
27th February 2012, 1:57 am

hi ! i tryed to install this on my centos 5.5 …while 5 hours and it was so simply ….. thanks a lot from a newbee
Reply
Ivaldo
13th March 2012, 5:37 am

I have installed everything on Centos 5.7 but in the last step:
===========
Install Memcached Module and PHP
yum install php php-pecl-memcached
===========
i got this message:
===========
Loaded plugins: fastestmirror, priorities
Loading mirror speeds from cached hostfile
* atomic: www5.atomicorp.com
* epel: mirrors.servercentral.net
* rpmforge: ftp-stud.fht-esslingen.de
1167 packages excluded due to repository priority protections
Setting up Install Process
Resolving Dependencies
–> Running transaction check
—> Package php-pecl-memcached.x86_64 0:1.0.0-1.el5 set to be updated
–> Processing Dependency: php-zend-abi = 20050922 for package: php-pecl-memcached
–> Finished Dependency Resolution
php-pecl-memcached-1.0.0-1.el5.x86_64 from epel has depsolving problems
–> Missing Dependency: php-zend-abi = 20050922 is needed by package php-pecl-memcached-1.0.0-1.el5.x86_64 (epel)
Error: Missing Dependency: php-zend-abi = 20050922 is needed by package php-pecl-memcached-1.0.0-1.el5.x86_64 (epel)
You could try using –skip-broken to work around the problem
You could try running: package-cleanup –problems
package-cleanup –dupes
rpm -Va –nofiles –nodigest

How do I fix it?
Reply
- JR
  13th March 2012, 7:50 am
  Hi Ivaldo,
  
  Could you post output of following command:
```
rpm -qa php\* |sort
```
  Reply
  - Ivaldo
    15th March 2012, 3:57 am
    
    Here is the results JR
    
    [[email protected] /etc/yum.repos.d]# rpm -qa php\* |sort
    php-5.3.3-3.el6_2.6.x86_64
    php-cli-5.3.3-3.el6_2.6.x86_64
    php-common-5.3.3-3.el6_2.6.x86_64
    php-pear-1.9.4-4.el6.noarch
    php-pecl-memcache-3.0.5-3.el6.x86_64
    Reply
  - Ivaldo
    15th March 2012, 4:02 am
    
    I did every steps again, and now I got:
    
    Loaded plugins: fastestmirror, priorities
    Loading mirror speeds from cached hostfile
    * remi: remi-mirror.dedipower.com
    87 packages excluded due to repository priority protections
    Setting up Install Process
    Resolving Dependencies
    –> Running transaction check
    —> Package php-pecl-memcached.x86_64 0:2.0.1-1.el6.remi will be installed
    –> Processing Dependency: php-pecl-igbinary(x86-64) for package: php-pecl-memcached-2.0.1-1.el6.remi.x86_64
    –> Processing Dependency: libmemcached.so.9()(64bit) for package: php-pecl-memcached-2.0.1-1.el6.remi.x86_64
    –> Running transaction check
    —> Package php-pecl-igbinary.x86_64 0:1.1.1-3.el6.remi will be installed
    —> Package php-pecl-memcached.x86_64 0:2.0.1-1.el6.remi will be installed
    –> Processing Dependency: libmemcached.so.9()(64bit) for package: php-pecl-memcached-2.0.1-1.el6.remi.x86_64
    –> Finished Dependency Resolution
    Error: Package: php-pecl-memcached-2.0.1-1.el6.remi.x86_64 (remi)
    Requires: libmemcached.so.9()(64bit)
    You could try using –skip-broken to work around the problem
    You could try running: rpm -Va –nofiles –nodigest
    
    and after rpm -qa php\* |sort
    
    I got:
    
    php-5.3.3-3.el6_2.6.x86_64
    php-cli-5.3.3-3.el6_2.6.x86_64
    php-common-5.3.3-3.el6_2.6.x86_64
    php-pear-1.9.4-4.el6.noarch
    php-pecl-memcache-3.0.5-3.el6.x86_64
    Reply
    - JR
      15th March 2012, 7:29 pm
      
      You could try maybe update your PHP (to latest 5.3.10) from remi repo and then try to install it again?
      Reply
krs
11th April 2012, 7:15 pm

Hi Jr,

Thanks for this post :)

Basically I installed and followed the instructions but when I try to access if class_exists from PHP it’s returning a false. (No info is visible either in phpinfo )

Here’s some data you that might help you:

[[email protected] /]# rpm -qa php\* |sort php-5.1.6-32.el5 php-cli-5.1.6-32.el5 php-common-5.1.6-32.el5 php-devel-5.1.6-32.el5 php-pear-1.4.9-8.el5 php-pecl-memcache-2.2.6-1.el5 php-pecl-memcached-1.0.0-1.el5

The even stranger thing is that I installed PHP using xampp and it states it is the 5.3.8 even in phpinfo (I hope this makes sense – if not sorry but I’m new to this)

I also noticed you where asking for this before:

[[email protected] /]# yum repolist Loaded plugins: fastestmirror, protectbase, security Loading mirror speeds from cached hostfile * base: centos.fastbull.org * epel: ftp.ps.pl * extras: centos.fastbull.org * rpmforge: fr2.rpmfind.net * updates: swissmirror.silyus.net 0 packages excluded due to repository protections repo id repo name status base CentOS-5 - Base 2,725 epel Extra Packages for Enterprise Linux 5 - i386 5,675 extras CentOS-5 - Extras 276 rpmforge RHEL 5 - RPMforge.net - dag 11,352 updates CentOS-5 - Updates 214 repolist: 20,242

Thanks in advance :)
Reply
- JR
  12th April 2012, 8:19 am
  
  Hi krs,
  
  You have pecl-memcache(d) installed for PHP 5.1.6, but you run xampp installed PHP, so I recommend you to update/install your PHP to 5.3.10 version with memcache and memcached modules.
  Reply
  - krs
    12th April 2012, 1:27 pm
    
    Thanks for your assistance :)
    
    I followed the instructions there … (I had the rpms updated already but made sure they are updated once more).
    
    Unfortunately same issue :(
    
    Here’s something weird … I tried
    
    php -r "print 'Exists:' . (int) class_exists('Memcache'). ' ';"
    
    and gave me a ‘1’ which is great … but when I access the same command from a page it gives me a false …
    Reply
    - JR
      12th April 2012, 2:01 pm
      
      Are you using same PHP on your web pages?
      
      Could you check your php (-v|-i) on command line and phpinfo() output on web page? Are you using same PHP installation and do you see Memcache module?
      Reply
      - krs
        12th April 2012, 4:09 pm
        
        bang!! You’re right … I had 2 installations of PHP …
        
        Note for beginners: Do not use xampp installation if you need memcached.
        
        Worked wonders JR :)
        
        Rock n roll ;)
        Reply
        
        JR
        13th April 2012, 10:37 am
        
        Excellent to hear that you got it working! :)
        Reply
Zazan Pratama
28th May 2012, 10:40 pm

Hi JR,
I’ve succesfully installed memcached, I also enabled APC. Can I use memcached and APC together?
I have 2GB VPS with 3 virtual servers. And I use wordpress.
Do I still need the backend plugins for memcached and APC?
Currently I am also using WP Super Cache. So I have WP Super Cache as plugin, and APC + memcached as PHP extension.
Did I do is correct? Please help me.
Thanks,
Reply

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45 comments on “Install Memcached on Fedora 29/28, CentOS/RHEL 7.5/6.10 - Comment Page: 1”

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