Memcached is an in-memory key-value store for small chunks of arbitrary data (strings, objects). It is commonly used as a cache to speed access to frequently used data.

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23
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5answers
27k views

Can a pool of memcache daemons be used to share sessions more efficiently?

We are moving from a 1 webserver setup to a two webserver setup and I need to start sharing PHP sessions between the two load balanced machines. We already have memcached installed (and started) and ...
66
votes
10answers
55k views

memcache vs memcached?

I want to use memcached http://www.danga.com/memcached/ I have installed it through yum install memcached But now I need to connect to PHP, and there is an extension named memcache and one named ...
26
votes
2answers
70k views

What does “<service_name> dead but subsys locked” mean?

I'm trying to run memcached on a centos box and it runs for a while, but then ends up in this state: memcached dead but subsys locked netstat shows this: tcp 0 0 :::11211 ...
3
votes
1answer
792 views

Memcached - one large instance vs many smaller

I will be adding a memcached server to my web app to offload lots of db requests. I'll be mostly caching different small id-name pairs (memberid-membername, blogid-blogname, etc) and expect total ...
4
votes
3answers
5k views

Yum install php-pecl-memcached - No package found (Have epel-release-6-8.noarch.rpm)

I believed I've downloaded and updated the EPEL rpm but I can't install php-pecl-memcached.. I'm very new to this, any help is appreciated. #rpm -Uvh epel-release-6-8.noarch.rpm warning: epel-release-...
38
votes
5answers
33k views

Which PHP (opcode) cache one should use and why?

I keep hearing about some PHP (opcode) caches like - APC, XCache, Memcache, eAccelerator, etc. But I couldn't ever figure out how to go about choosing one. Apart from performance benefit, which a ...
18
votes
3answers
32k views

How to increase the amount of memory memcache uses?

I am currently on a Xeon 7550 server running Redhat x86_64 es5 with 32gb RAM. I have memcache installed and the only step remaining in the configuration is to set how much memory it uses. I had done ...
9
votes
3answers
39k views

Memcache basic configuration

I have installed memcache for a Drupal site with the memcached pecl extension. It's all running fine but I'm still struggling with the configuration settings. For instance , following advice on ...
6
votes
3answers
8k views

Multiple Memcached server /etc/init.d startup script that works?

I install memcached server via source and can get standard start up script installed for 1 memcached server instance, but trying several scripts via google, can't find one that works to manager auto ...
1
vote
3answers
2k views

What would cause Memcached to Hang for 2+ seconds?

I'm going nuts trying to scale memcached. From their site: Memcached operations are almost all O(1). Connecting to it and issuing a get or stat command should never lag. If connecting lags, you ...
6
votes
1answer
11k views

How is memcache distributed?

I've got memcache running on 5 web servers all of which are on the host list in php and which are load balanced on the front end. So since memcached is supposed to be distributed the php client will ...
0
votes
2answers
2k views

Problems installing memcached

I am trying to follow the instructions here to install Memcached on a CentOS machine, and I'm not having much luck. The instructions say to first enable rpmforge repository as follows: rpm -Uhv http:...
-1
votes
2answers
5k views

Uninstall all instances of memcached

My host asked me to: " You will need to remove all instances of memcached that you have installed. " How would i go about doing this? I am on CentOS
3
votes
1answer
1k views

Does a growing number of TIME_WAIT connections affect server performance?

I have 2 servers, both running RHEL 6, one for Apache 2.2 and one for memcached (memcached-1.4.4-3). I noticed an increase in the number of TIME_WAIT connections on the Apache server netstat -n | ...
0
votes
2answers
23k views

Connecting to memcached “what port to use?” (php)

I've installed memcached perfectly and i can created a new instance but i don't understand if I'm connection to the right port... I always get a false return from get(key) Here is my code, $sql =...
-1
votes
1answer
1k views

Forward localhost memcached server on port 12111 to domain.com memcached server

My customers are running many scripts that uses memcached, but all of them are using localhost as a address. My localhost server is now out of RAM, because it's doing many other things like WWW and ...