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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120 views

Memcached memory consumption?

Server info: cPanel / 4GB The conf file as below: #Memory a user -m 128 # default port -p 11211 # user to run daemon nobody/apache/www-data -u nobody # only listen locally -l 127.0.0.1 Does it ...
3
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1answer
99 views

Nginx with Memcached module

I'm running Wordpress website with "W3 Total cache plugin" for Memcached on Nginx. I know that there is a Nginx module available for Memcached and I'm wondering what's the preferred/recommended method ...
1
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1answer
475 views

Nginx, PHP-FPM and Memcached

I have Wordpress installation running on two web servers powered by Nginx. I configured Memcached on both servers and I'm using W3 total cache plugin for Memcached: What's the recommended solution ...
3
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1answer
174 views

Does a RewriteCond that checks for the existence of a file cause high IO latency?

I am setting up an apache configuration to check for the existence of a file. If the file exists, then the server will redirect to a maintenance page. If not, the application will get served up ...
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0answers
217 views

Redis mass insert vs Memcached [closed]

I was trying to decide what to pick for a project , redis or memcached and while collecting cons i saw something on redis page about mass-insert http://redis.io/topics/mass-insert , it looks like it's ...
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3answers
243 views

Memcached Lagging

Let me preface this by saying that this is a followup question to this topic. That was "solved" by switching from Solaris (SmartOS) to Ubuntu for the memcached server. Now we've multiplied load by ...
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2answers
1k views

Troubles with memcache.so

I've been asked to launch a site that someone else built. It is a Wordpress shop site that needs Memcached to run, and I've been having troubles getting Memcached and the memcache php plugin working ...
1
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1answer
2k views

error while installing the libmemcached

I get this while installing libmemcached root@server [/libmemcached]# make make all-am make[1]: Entering directory `/libmemcached' if /bin/sh ./libtool --tag=CXX --mode=compile g++ -DHAVE_CONFIG_H ...
2
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1answer
124 views

difference between slab, page and chunk in memcached

what is the difference between slab, page and chunk in memcached? If we set -m 128, then how many slab, page, chunk we have? What is the benefit of slab?
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1answer
82 views

MediaWiki Multi Site + Memcached

I have multiple mediawiki installations, and I'm wondering if it's safe to allow them to all use the same memcached server. Are there any "gotchas" involved?
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3answers
804 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 ...
2
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0answers
183 views

Enyim Memcached Client Caching same item on multiple servers

We have a memecached cluster of 5 servers. When we reviewed the cache keys it shows that the same item is showing up across 4-5 servers in the cluster. As I understand it, Enyim's default key hash ...
0
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1answer
187 views

Memcached logrotate file not being installed. Bug with memcached 1.4.2?

My memcached logs are getting huge (in excess of 5GB). This isn't a huge problem in itself. I can easily remove them. I've sourced the problem to the memcached 1.4.2 package not installing a ...
0
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1answer
96 views

Server performance worsened after a hardware upgrade: how should I reconfigure the server? [closed]

I'm running a site on an Ubuntu/Apache/Django/PostgreSQL stack. We upgraded our server recently from 1 processor with 2 Gb total RAM (with 0.5 Gb of that RAM assigned to memcached) to a new server ...
0
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1answer
144 views

Can a slow database cause a web app to hold up a memcache connection?

I have a php application that uses memcache and a back-end database At times we see high "current connections" in memcache and can't determine why. Why php "misses" from memcache and needs to go ...
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1answer
193 views

how can I effect DNS Caching on PHP/Memcache application

In a very high loaded Ubuntu/PHP web server I found that the PHP line: $memcache->connect("int-aws_ec2.memcached.myapp.net",11211); sometimes takes ~5 secs. Replacing the url with the ip address ...
4
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1answer
306 views

How does php know what memcached node to look for its data in?

I am new to the world of Memcached clusters If I have a php web application that is using memcache - how does it does its hash and decide what node to check for a particular value to avoid having to ...
3
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1answer
145 views

Memcached on same servers as websites

I have a website that runs on 4 loadbalanced servers. These are Windows servers, each with 16 GB of memory. I need to move to a shared cache, so I was thinking of Memcached. However, budgetary reasons ...
0
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1answer
145 views

How to use Memcached

I read a bit about memcached but struggling to understand how exactly we use it. Is it a kind of server/application that we have to install on our machine? Is it a script that we have to include in ...
0
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1answer
257 views

Memcached and Django - When Ajax action is performed, ALL css and js is missing

I've got Django running and caching into Memcached. I have some ajax actions on a page and when those actions are performed, and the browser refreshd, the CSS and JS files are no where to be found. ...
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0answers
278 views

Memcached and repcached not replicating 2 master servers

I have memcached-1.2.8-repcached-2.2 installed on memcached on centos. They install went great and when i start memcached i get: replication: connect (peer=192.168.1.2:11212) replication: marugoto ...
4
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1answer
7k views

nginx with Memcache Vs Varnish

I was wondering if anyone has any comments / benchmarks / suggestions on Varnish Vs Memcache when used to serve content (usually 2-5kb JS file depending on the parameters in request; thousands of diff ...
2
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2answers
2k views

Memcached and php error

I have install memcached and when I try a script test like this one : $memcache = new Memcache; $memcache->connect('127.0.0.1', 11211); echo $memcache->getVersion(); I recive the nest error : ...
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2answers
701 views

Timeouts somewhere on our stack (haproxy, nginx, rails, memcached)

We have some timeouts that are driving me crazy, under virtually no load (probably a couple people hitting the servers per minute). We use nginx to redirect non-SSL to SSL, terminate the SSL, and ...
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1answer
1k views

Optimizing Web Server(apache2+nginx+memcached+eaccelerator) for high-loaded heavy application

I have a server with (Apache2 + nginx as reverse proxy, memcached cache and eaccelerator). The application is Magento - it is very heavy, due to high modularity and a lot of php files(5000-10000+). ...
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6answers
2k views

Dividing memcached between sites?

If I end up having 4 or 5 medium sites on one server, I want to be sure that each one that requires memcached has at least an allotted space. Is there a simple way to do this? The only ways that come ...
2
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3answers
2k views

memcached not restarting properly start-stop-daemon: warning: failed to kill 8175: No such process

im having some really weird and annoying issue with memcached. im running ubuntu server 10.04lts on a linode instance. i am using fabric with a django project and part of the fabric script allows the ...
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1answer
71 views

Should memcached be installed before or after cpanel?

I want to install memcached. I want to know if I should install cpanel first, or after the memcached installation
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0answers
264 views

repcached broken sync - memcached high avalaibility

I have been using repcached (memcached-1.2.8-repcached-2.2)to store php sessions in order to have a highly available memcached. Everything runs perfect, I can restart a daemon without losing sessions. ...
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1answer
146 views

Tips setting up nginx as proxy for php and node frameworks

We have a current, soon-to-be legacy PHP app installed in production, served with apache. Working fine. Currently trying to add in new Node.js alpha stack, which we're planning to install alongside ...
0
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1answer
1k views

Memcache Master and slaves

I'm using memcached-1.4.5-1.el5 & memcache-2.2.6 as php extension and memcached-1.2.8-repcached-2.2.1 for replication. The above packages are installed on 4 servers. How can I do the following? ...
0
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1answer
317 views

Connection errors when trying to use Memcache

I'm new to 'Memcache' but I've installed it and I think its' running, so far have I done the following correct? mkdir memcache wget http://pecl.php.net/get/memcache-3.0.6.tgz tar -xvfz ...
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2answers
2k views

Memcached: can connect but impossible to set value

I installed memcached on Debian squeeze using the package memcached. The memcached instance starts with 384 MB. Then I try to connect: jcisio@cecile:~$ telnet 127.0.0.1 11211 Trying 127.0.0.1... ...
2
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2answers
12k 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 ...
0
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2answers
2k views

Cannot load Memcached in PHP on Gentoo

I am using Gentoo Base System release 2.0.3, apache-2.2.21-r1, php 5.3.8-pl0 and memcached-1.4.5. I have done the following: emerge dev-php/pecl-memcache emerge dev-php/pecl-memcached emerge ...
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3answers
148 views

Would Memcached help in this scenario?

I work for a large internet site where people can share large pieces of text with each other. We store most information in InnoDB databases, but the actual pieces of text are stored somewhere in text ...
0
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2answers
260 views

Protecting direct access to port 11211 via a browser (memcached)

When I recently discovered about accessing ports via your browser at a domain level. Example, I accessed my domain at port 11211, I got an output of this: ERROR ERROR ERROR ERROR ERROR ERROR ERROR ...
0
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0answers
187 views

Memcached won't start as a service

I've installed memcached on my centos 5.2 box and it runs ok if I start it manually but I'm struggling to set it up as a service. After a long pause I just got this error: service memcached status ...
0
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2answers
1k 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 ...
3
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3answers
789 views

Copy MySQL to RAM as a poor man's memcached replacement?

What about this idea: I've got a 4GB MySQL database, with few UPDATEs. On system startup I copy it to RAM and run it from there. Every couple of hours or even on UPDATES, I dump it to disk. ...as ...
4
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2answers
1k views

Are there any drawbacks to running memcached on a Unix domain socket instead of the network (assuming one server)?

I’m setting up a Django website to use memcached to cache its pages. (The content of each page won’t change very often at all, so I’m hoping that most of the site will be served from memcached most ...
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1answer
3k views

Memcached Cluster - better to have 3 smaller instances or 2 mediums ones?

Currently I have 2 small servers in an memcached cluster. We are approaching out limits with them and need to grow. What are the pros/cons or going adding another small instance compared with having 2 ...
0
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2answers
757 views

How do I get php-memcached extension to work with SASL on RHEL6

I have RHEL6.1 with php. I've installed libmemcached-1.0.2 from src.rpm and compiled php-memcached 2.0.0b2. If I try to setSaslAuthData('user','pass') and write something to memcached (Couchbase ...
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1answer
599 views

increasing memcached limit size

I am having issues with the limit size of my memcached: How do I increase the limit_maxbytes? as the bytes_written is more than the limit_maxbytes?
0
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2answers
543 views

Better performance with memcached cluster or local memcaches?

I have a small cluster of servers balancing a Java web app. Currently I have 3 memcached servers caching data and all web apps shares all 3 memcached instances. I often get strange slowdowns and ...
0
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1answer
429 views

top on memcached server shows 110% cpu (memcached process) and 55% idle on cpu(s)

I tested on AWS ubuntu 10.04 memcached 1.4.2 When testing with memslap (different concurrent users numbers and different instance types (8G and 1.7G memory) Top shows 110% cpu on the memcached ...
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1answer
274 views

Memcached server: Is it a good practice to point two server urls to the same server?

I have a system where there are connections to a memcache server from several different files and servers. I would like to stay with one server but keep the option of increasing the number of ...
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1answer
765 views

How does upstream works in nginx (memcached_pass)?

Does nginx go to the next host in upstream block, if previous host not available or doesn't exist? upstream cache_cluster { 127.0.0.1:9000; //something on this port 127.0.0.1:11211; ...
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2answers
475 views

Memcached has to start by nobody? How to start it?

How to start the daemon by nobody? Do I have to start as nobody? I have only one box. So how many ports can I give to the daemon?
0
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2answers
838 views

How to optimize TCP / IP stack in Linux? [closed]

Currently I noticed there are about 15K open connections to localhost. It is mainly connecting to Memcached. I am clueless where I should start to optimize TCP/IP stack. Memcached support UDP, but ...